Abstract:
An apparatus and method of modular manufacturing process for a transmitter, receiver and/or transceiver is disclosed. The modular process assembles an array of optoelectronic devices to an array header to form an optoelectronic array package. Once the optoelectronic array package is assembled, it is tested and verified the functionality and alignment between the optoelectronic devices and optical fibers. The optoelectronic array package is subsequently coupled to an optical lens array to form an array optical subassembly. After the array optical subassembly is tested, it is coupled to an optical fiber connector to form an optical module. The optical module is then tested to verify its functionality and alignment.

Description:
FIELD OF THE INVENTION  
       [0001]     The present invention relates to the field of network communications. More specifically, the present invention relates to a secured access to restricted information over the networks.  
       BACKGROUND  
       [0002]     The piracy and illegal copying of software and other digital media has become extremely pervasive and currently results in billions of dollars in lost revenue for media and software owners worldwide. This problem is compounded by the advent of faster and more technologically advanced computers, the development of inexpensive mass storage media (i.e. CDs, DVDs), as well as copying devices such as CD writers, which aid in various aspects of digital piracy.  
         [0003]     Each technological breakthrough seemingly results in a new and better way to illegally copy intellectual property belonging to another. Examples of digital piracy include: the copying of proprietary software to sell to others, the installing of a single proprietary software package on several different systems, placing a copy of proprietary software on the Internet, or even downloading copyrighted images from the Internet.  
         [0004]     While digital piracy is fairly common among many end users who have lawfully purchased the software, large-scale piracy typically occurs at a reseller level. For instance, a reseller may duplicate and distribute multiple copies of a software program, a digital audio file or a digital video file to different customers. These counterfeit versions are sometimes passed on to unsuspecting customers. Hardware distributors have been known to preload different systems using a single software package. In such instances, customers are either not provided with original manuals, diskettes and/or compact discs (CDs) or are simply supplied with pirated copies of the same.  
         [0005]     Numerous methods to combat the rampant problem of digital piracy have been devised. One of the methods is the used of trialware to restrict usage of a software product. Trialware may be implemented by either programming an expiration date or a usage counter into a software program. Such a scheme limits the use of a software product to a particular duration or a number of trial times, respectively, after which the protected application cart no longer be launched. Users are then forced to either purchase the full version of the product or to quit using it altogether.  
         [0006]     Hardware keys are another type of anti-piracy device that is commonly used to prevent illegal use of software. Hardware keys are devices that are plugged into selected ports of a computer. Once the software is executed, it then detects the presence of a hardware key in a similar manner to detecting other hardware devices (such as a printer, monitor or a mouse). Programming the software such that it only operates when an appropriate hardware key is attached prevents illegal use of the software. As the number of hardware keys distributed to end users correspond to the number of seat licenses purchased, the software will not work when installed on another system without the requisite hardware key.  
         [0007]     Another common anti-piracy technique is to require the entry of a certain registration key that is supplied by the software company before the software can be installed. Traditionally, the registration keys are given only with the original software package, although some are issued electronically. Unfortunately, there is nothing to prevent the holder of the registration key from installing the software on multiple systems. In addition, many of the electronic registration keys are based on the user&#39;s personal information (i.e. such as the user&#39;s name), therefore, some backers have developed programs to calculate registration keys for random names.  
         [0008]     Unfortunately, as with the use of the registration key, all of the above anti-piracy systems (and many others) are easily circumvented by hackers. A common method of combating these anti-piracy techniques is to disassemble the coding of the Application Programming Interface (API) to assembly language and, thereafter, decompile the assembly language into programming language. With the knowledge gained from the program flow, the hacker can easily re-write the program or set certain conditions within the program itself, such that it bypasses all the anti-piracy authentication algorithms.  
         [0009]     In view of the foregoing, it is extremely desirable to have an anti-piracy system that cannot be easily re-programmed or bypassed by computer hackers or other digital pirates. It is also desirable to have an anti-piracy system that cart be integrated with existing mass storage devices.  
       SUMMARY OF THE INVENTION  
       [0010]     According to one aspect of the present invention, a method of SAKE is provided in which SAKE is coupled to a host or client system and SAKE obtains user&#39;s biometric identity information through its biometric sensor. User&#39;s biometric identity information, such as fingerprints, is verified according to the biometric templates stored in an internal memory unit of SAKE. Various initialization information including public key associated with the user is retrieved from the internal memory unit of SAKE and the initialization information is provided to an information provider or Internet Service Provider (“ISP”) via a computer network such as Internet, through the host system. Upon verifying the initialization information, a network communication is established between SAKE and the information provider. When SAKE obtains information from the information provider, the information is encrypted and stored in a flash memory within SAKE.  
         [0011]     Additional features and benefits of the present invention will become apparent from the detailed description, figures and claims set forth below.  
     
    
     BRIEF DESCRIPTION OF THE DRAWINGS  
       [0012]     The present invention will be understood more fully from the detailed description given below and from the accompanying drawings of various embodiments of the invention, which, however, should not be taken to limit the invention to the specific embodiments, but are for explanation and understanding only.  
         [0013]      FIG. 1  illustrates a schematic of an authentication system to verify a password from a host in accordance with one embodiment of the present invention.  
         [0014]      FIG. 2  illustrates a schematic of an authentication system to verify a password from a host in accordance with a further embodiment of the present invention.  
         [0015]      FIG. 3  illustrates a schematic of an authentication system to verify a password from a host in accordance with another embodiment of the present invention.  
         [0016]      FIG. 4  illustrates a schematic of an authentication system to verify a password from a host in accordance with yet another embodiment of the present invention.  
         [0017]      FIG. 5  illustrates a method for authenticating a password from a host in accordance with one embodiment of the present invention.  
         [0018]      FIG. 6  illustrates a schematic of a computer system using an anti-piracy file manager in accordance with a further embodiment of the present invention;  
         [0019]      FIG. 7  illustrates a schematic of an authentication system for receiving data from a web server in accordance with another embodiment of the present invention.  
         [0020]      FIG. 8  illustrates a network configuration in accordance with one embodiment of the invention.  
         [0021]      FIG. 9  is a block diagram illustrating a SAKE device in accordance with one embodiment of the present invention.  
         [0022]      FIG. 10  is a flow chart illustrating a method of providing data access control over a network in accordance with one embodiment of the present invention.  
     
    
     DETAILED DESCRIPTION  
       [0023]     An apparatus and method for providing data access control over Internet are discussed.  
         [0024]     In the following description, for purposes of explanation, numerous specific details are set forth to provide a thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that these specific details may not be required to practice the present invention. In other instances, well-known circuits and devices are shown in block diagram form to avoid obscuring the present invention.  
         [0025]     It is understood that the present invention may contain transistor circuits that are readily manufacturable using well-known art, such as for example CMOS (“complementary metal-oxide semiconductor) technology, or other semiconductor manufacturing processes. In addition, the present invention may be implemented with other manufacturing processes for making digital devices.  
         [0026]      FIG. 1  illustrates an authentication system  10  to verify a password  12  from a host  14  in accordance with one embodiment of the present invention. Authentication system  10  includes a first storage unit  16 , a read-only memory (ROM) unit  18  and a microcontroller  20 . Microcontroller  20  is coupled to host  14 , first storage unit  16 , ROM unit  18  and a second storage unit  22 . Microcontroller  20  is preferably coupled to host  14  through a Universal Serial Bus (USB) controller.  
         [0027]     In other embodiments of the present invention, ROM unit  18  may be formed as part of microcontroller  20 . Furthermore, both first storage unit  16  and second storage unit  22  may be one of a number of mass storage devices, including hard drives, floppy disks, or removable flash memory devices, such as the ThumbDrive manufactured by Trek 2000. In addition, the two storage units may be utilized in one physical structure to form a single mass storage device. The mass storage device may also be placed with microcontroller  20  to form a single chip.  
         [0028]     First storage unit  16  stores an authentication sequence  24 , which is used to verify password  12 . An authentication algorithm  26  to authenticate password  12  with authentication sequence  24  is programmed onto ROM twit  18 . In addition, ROM unit  18  preferably comprises a shutdown algorithm  28 . Because these algorithms and other data are hard coded, the contents of ROM unit  18  cannot be decompiled or altered. Upon receiving password  12 , microcontroller  20  loads and executes authentication algorithm  26  to verify password  12  with authentication sequence  24 . Access to second storage unit  22   s  permitted only if password  12  is verified.  
         [0029]     Password  12  may be entered by a user or a software program executed by host  14  after receiving a query from microcontroller  20 . Because authentication algorithm  26  is hard coded onto ROM unit  18 , copying or decompiling and changing the software program resident on host  14  does not breach the copy protection provided by the present invention. It will be apparent to one skilled in the art that password  12  may be a private string of characters, a sequence of communication protocols or some other security protocol known only to an authorized user. In addition, password  12  and authentication sequence  24  may form part of a biometric authentication process by using a user&#39;s fingerprints, iris, face, or voice as authentication means.  
         [0030]     Password  12  may also be programmed into the software running on host  14  and recognizable only by authentication algorithm  26  and therefore not known to an end user. As described above, authentication algorithm  26  is preferably implemented on hardware or firmware (such as ROM unit  18 ) so that it is tamper resistant; that is, authentication algorithm  26  will be either extremely difficult to reverse engineer or extract data from, and therefore extremely difficult to bypass.  
         [0031]     Shutdown algorithm  28  is preferably implemented as a deterrent against brute force attacks by shutting down the entire system if a series of incorrect passwords is received by microcontroller  20 . An authentication system programmer may define the maximum number of incorrect passwords allowed before the system shuts down. Shutdown algorithm  28  may also be programmed to not accept anymore password entries or a specified amount of time. By using shutdown algorithm  28 , trial and error methods used by brute force application programs to identify password  12  would become an extremely tedious process for hackers. The algorithm would therefore deter potential hackers from even attempting to identify password  12 .  
         [0032]     Second storage unit  22  is used to store programs and/or files, which are required for a program on host  12  to run. Examples of such files include executable programs such as a software installer), digital audio files, digital video files, image files, text files, and library files. Microcontroller  20  allows access to second storage unit  22  from host  14  only if the correct password  12  has been received by microcontroller  20 .  
         [0033]     Although illustrated in this embodiment as separate entities, it should be evident to a person skilled in the art that microcontroller  20 , first storage unit  16 , ROM unit  18  and second storage unit  22  may be combined in a number of ways. For example, microcontroller  20 , first storage unit  16 , ROM unit  18  and second storage unit  22  may be implemented on a single semiconductor chip. In an alternative embodiment, microcontroller  20  and ROM unit  18  may be implemented on a chip that is separate from the storage units.  
         [0034]     The present invention therefore has great flexibility of design that may easily be altered depending on a user&#39;s requirements. For example, on one hand, the use of multiple chips may allow different vendors to manufacture different parts of the authentication system. On the other hand, fabricating the present invention onto fewer hips (or a single chip) may be less expensive and provide better performance. In addition, if ROM unit  18  and microcontroller  20  are located on the same chip, it may be more difficult to separate the ROM to read the data stored.  
         [0035]      FIG. 2  illustrates an authentication system  50  to verify a password  52  from a host  54  in accordance with a further embodiment of the present invention. Authentication system  50  comprises a first storage unit  56 , a ROM unit  58  and a microcontroller  60 . Microcontroller  60  is coupled to host  54 , first storage unit  56 , ROM unit  58  and an encoder  62 . Encoder  62  is further coupled to a second storage unit  64 . First storage unit  5  stores an authentication sequence  66 , which is used to verify password  52 . An authentication algorithm  68  to authenticate password  52  is programmed onto ROM unit  58 . ROM unit  58  preferably includes a shutdown algorithm  70 .  
         [0036]     Upon receiving password  52 , microcontroller  60  loads and executes authentication algorithm  68  to verify password  52  with authentication sequence  66 . Access to second storage unit  64  is permitted only if password  52  is verified. Shutdown algorithm  70  preferably shuts down the entire system if a series of wrong passwords is received by microcontroller  60 . An authentication system programmer determines the maximum number of incorrect password attempts allowed.  
         [0037]     Data to be read from or written onto second storage unit  64  is first decrypted or encrypted respectively by encoder  62 . Many different encryption schemes may be used by encoder  62 , including International Data Encryption Algorithm (IDEA), Data Encryption Standard (DES) encryption. Triple Data Encryption Standard (3-DES) encryption, and Pretty Good Privacy (PGP). By encrypting the contents of a second storage unit  64 , a hacker will not be able to make sense of the contents even if he manages to read the contents bypassing microcontroller  60  (for example, by using a probe)/After password  52  has been authenticated, a decoder (not illustrated) may be used to decrypt the contents of second storage unit  64 .  
         [0038]     Alternatively, the data stored in second storage unit  64  may be protected by hash coding. In addition, authentication sequence  66  is preferably encrypted or hashed as well prevent hackers from unraveling authentication sequence  66 . This may be accomplished without requiring an additional encoder if first storage unit  56  is located thin second storage unit  64 .  
         [0039]      FIG. 3  illustrates a schematic of an authentication system  100  to verify a password  102  from a host  104  in accordance with another embodiment of the present invention. Authentication system  100  comprises a ROM unit  106  and a microcontroller  108 . Microcontroller  108  is coupled to host  104 , ROM unit  106  and an encoder  110 . Encoder  110  is further coupled to a storage unit  112 . An authentication algorithm  114  to authenticate password  102  is programmed onto ROM unit  106 . An authentication sequence  116  to verify password  102  is hard code into authentication algorithm  114 . ROM unit  106  preferably comprises a shutdown algorithm  118 .  
         [0040]     As described in previous embodiments, upon receiving password  102 , microcontroller  108  loads and executes authentication algorithm  114  to verify password with authentication sequence  116 . Access to storage unit  112  is permitted only if sword  102  is verified. Shutdown algorithm  118  is preferably used to shut down the entire system if a series of incorrect passwords is received by microcontroller  108 .  
         [0041]     By hard coding authentication sequence  116  directly into authentication algorithm  114 , possibly in multiple places, modification of authentication sequence  116  becomes substantially more difficult. In order to change a hard code authentication sequence, not only is recompilation necessary (if using a compiled language), but also sufficient understanding of the implementation is required to ensure that the change will not cause program failure. Such a measure makes it difficult for a hacker to re-program authentication system  100 .  
         [0042]      FIG. 4  illustrates an authentication system  150  to verify password  152  from a host  154  in accordance with another embodiment of the present invention. Authentication system  150  comprises a read-only memory (ROM) unit  156  and a microcontroller  158 . Microcontroller  158  is coupled to host  154 , ROM unite  156  and an encoder  160 . Encoder  160  is further coupled to a storage unit  162 . Data to be read from written onto storage unit  162  is first decrypted or encrypted respectively by encoder  160 . Alternatively, hash coding may be employed to protect the data stored in storage unit  162 .  
         [0043]     Storage unit  162  is made up of two types of data storage areas: a public storage area  164  and a private storage area  166 . An authentication sequence  168 , which is used to verify password  152 , is stored in private storage area  166 . An authentication algorithm  170  to authenticate password  152  is programmed onto ROM unit  156 . ROM unit  156  also contains a shutdown algorithm  172 . Public storage area  164  and private storage area  166  may be created by under-declaring the memory size available on storage unit  162 .  
         [0044]     Take for example a storage unit with physical addresses ranging from 000 to 1000, if only physical addresses 000 to 500 are declared to an operating system (OS) such as Windows, on host  154 , the OS will not be aware of the presence of physical addresses 501 to 1000. Under such circumstances, data stored within physical addresses 000 to 500 will be accessible to any user. This area is known as a public storage area. Conversely, undeclared physical addresses 501 to 1000 form a private storage area since these tresses are only be available to microcontroller  158  and cart only be accessed by an authorized user or software program.  
         [0045]     Under non-secure operating conditions, any user may instruct host  154  to read data from or write data onto public storage area  164 . However, if a user wishes to access private storage area  166 , the user or the software program must first enter password  152 , which is then sent to microcontroller  158  for authentication. Upon receiving password  152 , microcontroller  158  executes authentication algorithm  170  to verify password  152  with authentication sequence  168 . Access to private storage area  166  is permitted only if password  152  is verified. Shutdown algorithm  172  shuts down the entire system if a series of incorrect passwords is received by microcontroller  158 .  
         [0046]      FIG. 5  illustrates a method  200  for authenticating a password from a host in accordance with one embodiment of the present invention. An authentication sequence is first provided in a block  202  and preferably stored in a first storage unit. Also provided, in another block  204 , is an authentication algorithm, which is stored in a ROM unit. After receiving a prompt from the host, a password is entered in by a user or by a software program. The password is then received in a block  206  by a microcontroller that executes an authentication algorithm to verify the password with the authentication sequence in a decision block  208 .  
         [0047]     If the password is verified in decision block  208 , access to a private area, such as second storage unit in the above-described embodiments, will be permitted in a block  210 . The user is then able to read from or write onto the second storage unit, which is preferably encrypted. If the password is not verified in decision block  208 , the user will be denied access to the second storage unit and method  200  will end in a block  212 . Alternatively, if the password is incorrect, the user may be given additional chances to enter the right password. However, system is preferably shut down if a series of incorrect passwords is received by the microcontroller.  
         [0048]      FIG. 6  illustrates a schematic of a computer system  250  using an anti-piracy file manager  252  in accordance with a further embodiment of the present invention. Anti-piracy file manager  252  is coupled to an anti-piracy authentication engine  254  and a storage unit  256 . Anti-piracy manager  252  answers requests from a number of software programs  258  that request different authentication schemes from anti-piracy authentication engine  254 . Access to storage unit  256  is guarded by an authentication system  260 . In this exemplary system, the flexibility of the present invention allows for authentication of many different types of software programs at the same time through anti-piracy file manager  252 .  
         [0049]      FIG. 7  illustrates a schematic of an authentication system  300  for receiving data from a web server  302  in accordance with another embodiment of the present invention. Authentication system  300  is coupled to a host  304 , which is connected to web server  302 , typically by using either a dial-up or a broadband connection. Host  304  is coupled to authentication system  300 , preferably, via a USB connector. Examples of host  304  include a personal computer (PC), a personal digital assistant (PDA), a Wireless Application Protocol-enabled (WAP-enabled) mobile phone, and a tablet.  
         [0050]     To retrieve data from web server  302 , a password received by host  304  is verified by authentication system  300 . The password is typically entered by a user or by software the host, if the password is entered by the user, the authentication system may also be configured to accept a biometrics password, such as a fingerprint or a retina scan. If the verification is successful, authentication system  300  sends a request through host  304  for access to web sewer  302 . Upon receiving the request, web server  302  grants access to a web page having the secured data. The data may be in the form of a music file or an online book or a software program. Because the authentication algorithm in authentication system  300  is hard coded, an unauthorized user will not be able to circumvent or change the verification scheme in authentication system  300  and, hence, will be unable to access the data on web server  302 .  
         [0051]     In another embodiment of the present invention, the password is embedded in the data to be retrieved from the Internet. Host  304  sends a request for the data to web server  302 . Upon receiving the request, web server  302  sends the password embedded in the quested data to authentication system  300  for verification. If the verification is successful, authentication system  300  allows host  304  to access the data, upon where it may be displayed or executed. In a preferred embodiment, the data from web server  302  is encrypted. Decryption of the data is carried out in authentication system  300  before in host  304  or storage in authentication system  300 .  
         [0052]     Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention. Furthermore, certain terminology has been used for the purposes of descriptive clarity, and not to limit the present invention. The embodiments and preferred features described above should be considered exemplary, with the invention being defined by the appended claims.  
         [0000]     Overview of Storage Anti-Piracy Key Encryption Device (“SAKE”)  
         [0053]     According to one aspect of the present invention, a method of SAKE is provided in which SAKE is coupled to a host or client system and SAKE obtains user&#39;s biometric identity information through its biometric sensor. User&#39;s biometric identity information, such as fingerprints, is verified according to the biometric templates stored in an internal memory unit of SAKE. Various initialization information including public key associated with the user is retrieved from the internal memory unit of SAKE and the initialization information is provided to an information provider or Internet Service Provider (“ISP”) via a computer network such as Internet, through the host system. Upon verifying the initialization information, a network communication is established between SAKE and the information provider. When SAKE obtains information from the information provider, the information is encrypted and stored in a flash memory within SAKE.  
         [0054]     In one embodiment, SAKE is a storage and anti-piracy device that includes onboard biometric verification capability. SAKE has universal connectivity capabilities, such as USB connectors. High-speed data transfer and large memory capacity are other advantages of SAKE. For example, SAKE may have the memory capacity of one gigabytes and have an access speed up to one gigabit per second. A more detailed discussion of SAKE will be discussed later.  
         [0055]      FIG. 8  illustrates a network configuration  800  in accordance with one embodiment of the invention. Network configuration  800  includes multiple SAKEs  802 , host systems, Internet  810 , and various information providers, content providers and/or ISPs. The host systems, in one aspect, includes personal computer (“PC”)  804 , laptop  805 , personal digital assistant (“PDA”) and other digital processing systems, such as servers, mini-computers, mainframe computers, point of sale machines, workstations, et cetera. Internet  810 , in another embodiment, may be an Intranet, wide area network (“WAN”) and/or local area network (“LAN”). Information providers include online transaction  820 , Internet sides  830 , sales of services  840 , personal medical information  850 , e-leaning materials  860 , library  865 , publisher  870 , music  875  and TV games and movies  880 . It is apparent to one of ordinary skilled in the art that other functional blocks may be added to network configuration  800 .  
         [0056]     The content provider of online transaction  820  includes various online sale transactions, which includes online sales of merchandises, software, information and network services over the Internet. In one embodiment, SAKE  802  provides a secured transaction, which involves access, purchasing and download the product, between the user and the information provider. An advantage of using SAKE is to prevent unauthorized, rampant copying of commercial information.  
         [0057]     The content provider of Internet sites  830  includes various restricted web sites, which require, for example, memberships to access the information posted on the restricted web sites. In one embodiment, SAKE  802  provides a controlled access to restricted Internet sites. In another embodiment, SAKE  802  provides a method of controlled distribution of information received by SAKE. An advantage of using SAKE in this case is to prevent unauthorized access.  
         [0058]     The content provider of Services  840 , in one aspect, includes various online services that provide support, resources and/or upgrades. In one embodiment, SAKE  802  provides a method of providing services and/or upgrades to clients who are authorized and/or registered for the services. An advantage of using SAKE in this case is to prevent unauthorized party to receive services.  
         [0059]     The content provider of medical data  850 , in one aspect, contains medical information, such as a restricted hospital web site. In one embodiment, SAKE  802  provides a secured method to retrieve personal medical information over the Internet from the content provider for medical data  850 . An advantage of using SAKE in this case is to prevent unauthorized party to access personal medical data.  
         [0060]     The content provider of e-learning  860 , in one aspect, includes various online educational materials that are either posted on the web page or downloaded from the web site. In one embodiment, SAKE  802  provides a secured method to download various educational and/or learning materials to from the content provider to various clients who are authorized and/or registered to receive the educational materials. An advantage of using SAKE in this case is to prevent unauthorized party to download the educational materials from the content provider of e-learning  860 .  
         [0061]     The content provider of library  865  and publisher  870 , in one aspect, includes various online books and articles that either can be checked out or purchased. In one embodiment, SAKE  802  provides a secured method of purchase or checkout by downloading digital a copy of book and/or article for authorized users. An advantage of using SAKE in this case is to prevent unauthorized party to obtain copies of books and articles posted on the web sites.  
         [0062]     The content provider of Music  875  and television games/movies  880 , in one aspect, includes various online digital music and games/movies that either can be checked out or purchased. In one embodiment, SAKE  802  provides a secured method of purchase or check out a digital copy of music, games and/or movies for authorized users. An advantage of using SAKE in this case is to prevent unauthorized party to obtain copies of music, games and/or movies posted on the web sites.  
         [0063]     In operation, when, for example, a user desires to purchase a software from a website, a SAKE first authenticates the user, which may involve biometric identification process. After the identity of the user is verified, SAKE notifies the website with an access request and security codes. Upon acknowledgement of access request and security codes, the website, which could act through an ISP, establishes a network communication with SAKE over the Internet  810 . An encrypted public key is subsequently forwarded from SAKE to the website to confirm the true identity of user. Once the user identity is confirmed by the website, it sends the requested software to SAKE via SAKE&#39;s host system. Upon receiving the software, it is directly stored in the flash memory of SAKE with limited or no trace in the host system.  
         [0064]     An advantage of using SAKE, function as an anti-piracy device, is to prevent unauthorized copying of information over the Internet. Another advantage of using SAKE is to store the downloaded contents directly into SAKE only, thereby there is no traces on the host system after SAKE is disconnected from the host system. Another advantage is to employ personal and biometric information to authenticate users before the users are given access to quality contents over a network, such as Internet or Intranet.  
         [0065]      FIG. 9  is a block diagram illustrating a SAKE  900  in accordance with one embodiment of the present invention SAKE  900  includes a micro-control unit (“MCU”)  901 , flash memory  922 , USB connector (plug)  916  and biometric sensor  920 . MCU  901  further includes a processor  902 , internal memory  904 , tamper proof unit  906 , encryption/decryption unit  908 , hashing algorithm  910 , biometric verification  912  and USB controller  914 . In one embodiment, a processor  902 , internal memory  904 , tamper proof unit  906 , encryption/decryption unit  908 , hashing algorithm  910 , biometric verification  912  and USB controller  914  are fabricated on a single die. Various buses  930 - 938  are used to couple various units in SAKE  900 . It is apparent to one of ordinary skilled in the art that other functional blocks may be added to SAKE  900 .  
         [0066]     Processor  902  is coupled to buses  930 - 932  for communicating information to and from various components. Processor  902  includes microprocessor, processor, central processing unit, or digital processing unit such as Pentium™, PowerPC™, Alpha™ and the like. Processor  902  controls the data flow of SAKE  900  through executing instructions. In one embodiment, processor  902  executes navigation software, which may be stored in internal memory  904 , for controlling the data flow.  
         [0067]     Internal memory  904 , in one embodiment, is a flash memory designed to store authentication data, such as public keys, private keys, biometric templates, et cetera. It should be noted that public keys, private keys, and biometric templates are loaded into internal memory  904  during the setup or initialization of SAKE  900 . Internal memory  904  is coupled to processor  902  through dedicated bus  932  for fast data store and fetch. In another embodiment, Internal memory  904  is coupled to processor  902  through system bus  930 . Biometric templates include fingerprint and/or iris templates. In another embodiment, internal memory  904  stores the navigation software, which is responsible to control data flow between ISP and SAKE. The navigation software is also responsible to retrieve data from flash memory  922  and then display the data.  
         [0068]     Biometric sensor  920  is coupled to biometric verification unit  912  via bus  936 , wherein biometric sensor  920  detects biometric information or patterns from a user. For example, fingerprint sensor as a biometric sensor detects fingerprint patterns from the user who is currently holding SAKE  900 . Once the fingerprint of the user is obtained, it is forwarded from the fingerprint sensor to biometric verification unit  912  for authenticating the user. Upon receipt of the biometric information, biometric verification unit  912  fetches biometric templates, such as fingerprint templates, from internal memory  904  via processor  902  and authenticates the biometric information just received against biometric templates. The result of the authentication is forwarded to processor  902 . It should be noted that the biometric templates are loaded during the initialization of SAKE.  
         [0069]     USB controller  914  is coupled to system bus  930  and USB connector  916  via a dedicated bus  938 . USB controller  914  is designed to control communication between SAKE  900  and the host system, not shown in  FIG. 9 . USB connector  916 , in one embodiment, is a USB plug that is capable to directly connect to a USB port of host system. USB connector  916  is designed to support entire weight of SAKE while it is plugged in a USB port. It is further noted that when SAKE is plugged in a USB port of the host system, only a portion of SAKE is inserted into the host system.  
         [0070]     Hashing algorithm  910  is coupled to system bus  930  to perform a hash function. Hashing algorithm  910  is, in one embodiment, a standard hashing algorithm, such as secure hash standard (SHS) and is designed to hash public keys before they are being sent to their destination over the Internet.  
         [0071]     Flash memory  922  is coupled to MCU  901  via bus  934  and is configured to store large amounts of data. For example, flash memory  922  can store up to one gigabyte. In one embodiment, flash memory  922  has capacity of mass storage and data downloaded from the ISP can be directly stored in flash memory  922 . To secure data from hacking, data is encrypted before it is stored in flash memory  922 . Encryption/decryption unit  908  is coupled to system bus  930  and coupled to flash memory  922  via bus  934 . In one embodiment, Encryption/decryption unit  908 , which may be a standard encryption code, encrypts data according to a private key before it stores in flash memory  922 . Encryption/decryption unit  908  is also used to decrypt data according a private key after the data is fetched from flash memory  922 .  
         [0072]     Tamper proof unit  906  is coupled to system bus  930 . A function of tamper proof unit  906  is designed to erase data stored in internal memory  904  and flash memory  922  when tamper proof unit  906  detects tampering or hacking SAKE using high temperature, voltage, and/or frequency. In one embodiment, tamper proof unit  906  contains sensors that can detect abnormal conditions, such as voltage, frequency and temperature are beyond the specification.  
         [0073]      FIG. 10  is a flow chart  100  illustrating a method of providing data access control over a network in accordance with one embodiment of the present invention. At block  1002 , the process couples a control device to a digital processing system. In one aspect, the control device is a SAKE, which includes a USB connector, MCU, flash memory and biometric sensor. The USB connector is used to directly connect to a USB port of digital processing system, which acts as a host system of SAKE. The process proceeds to block  1004 .  
         [0074]     At block  1004 , biometric sensor detects user&#39;s biometric information and forwards the detected biometric information to biometric verification unit. The verification unit authenticates the detected biometric information against biometric template stored in the internal memory. When the user&#39;s identity is authenticated, which means the biometric information such as fingerprint matches with the biometric template, the process moves to block  1006 .  
         [0075]     At block  1006 , the process retrieves initialization information from the internal memory. In one embodiment, the initialization information includes a security code and a public key. The security code, which may vary between ISPs, is used to establish an initial communication between SAKE and the ISP. The process proceeds to block  1008 .  
         [0076]     At block  1008 , the process forwards the security code to an associated ISP and request to establish communication. Once the communication is formed, the public key is forwarded to the ISP to confirm that the true user is communicating with the ISP. The process moves to block  1010 .  
         [0077]     At block  1010 , a communication between SAKE and the ISP is established and ISP is ready to perform user&#39;s request. The process moves to block  1012 .  
         [0078]     At block  1012 , SAKE receives requested information such as a copy of digital book or a movie. When the requested information is encrypted, the process moves to block  1014 .  
         [0079]     At block  1014 , the process stores the encrypted data in the flash memory of SAKE. The process moves to the next block.  
         [0080]      FIG. 11  is a flow diagram showing various steps of an embodiment of the authentication method of the present invention. In a currently preferred embodiment, a user requests and downloads restricted content into a SAKE device assigned to that user from a content server using the authentication process as described below with reference to  FIG. 11 . As described above, the restricted content can be any of a wide variety of information, such as copyrighted materials (e.g., newspapers, books, magazines, music, movies, software, games, etc.), confidential records (e.g., medical, financial), proprietary business information (e.g., personnel files, technical designs, client contacts, etc.), contents that require payment or age verification before access is granted, and any other information requiring access control.  
         [0081]     In step  1105 , to initiate the authentication process, a user accesses a login web page of a content provider utilizing an embodiment of the authentication method of the present invention. Typically, the user navigates the Web using common internet browser software (e.g., Microsoft Internet Explorer) installed on a client computer connected to the Internet. To access the designated login page, the user enters the web page address (e.g., URL address) of the login page or click on a hyperlink or bookmark pointing to that address. Depending on the particular application, the client computer can be a desktop computer, a laptop computer, a personal digital assistant (PDA), a point-of-sale (POS) terminal, a television, a gaming console, a networked kiosk, or any other network-enabled device that allows the user to interact with the content server. In one embodiment, the login page is stored on a content server and is programmed to include a “Login” button or link which, when clicked, causes the content server to generate a command that initiates the authentication process. Accordingly, the user clicks on the “Login” button to start the authentication process.  
         [0082]     In step  1110 , the SAKE device, which in one embodiment comprises a USB plug that is plugged into a USB port of the client computer, receives the command from the content server. This command establishes communication between the content server and the SAKE device. The command also serves to notify the SAKE device that the content server is ready to receive information pertaining to the authentication process from the SAKE device.  
         [0083]     In step  1115 , the SAKE device captures biometric information from the user via a biometric detector that is built into the SAKE device. In a currently preferred embodiment, the biometric detector is a built-in fingerprint sensor on an upwardly-facing surface of the SAKE device. When the user places his/her thumb on the sensor, the thumbprint is captured for verification by the SAKE device, as described in step  1120  immediately below. While fingerprinting is described herein as an identity authentication technique, it is appreciated that other biometric-based techniques, such as iris-scan, can also be used in accordance with the present invention.  
         [0084]     In step  1120 , the captured biometric information is verified against stored biometric template(s) of one or more authorized user(s). In one embodiment, when the SAKE device is assigned to an authorized user, the fingerprint of that authorized user is captured and stored into the SAKE device as a fingerprint template. In an embodiment where multiple authorized users are supported, a separate template is created and stored for each authorized user. Thereafter, when a person wants to access restricted contents on a server for which the SAKE device is assigned, that person&#39;s fingerprint can be verified by a fingerprint verification engine in the SAKE device against the stored fingerprint template(s) of the authorized user(s).  
         [0085]     If in step  1120  it is determined that the captured biometric information (e.g., fingerprint) matches the stored biometric template (or one of the templates in the case of multiple authorized users), then in step  1125 , the SAKE device transmits a notification to the content server, indicating to the server that the current user&#39;s identity has been authenticated biometrically.  
         [0086]     In step  1130 , the SAKE device receives a device authentication request from the content server. In a preferred embodiment, the content server transmits a device authentication request to the SAKE device upon receiving the notification of user identity authentication from the SAKE device as described in step  1125  above.  
         [0087]     In step  1135 , the SAKE device transmits a device authentication reply to the content server in response to the device authentication request described in step  11300  above. Significantly, the device authentication reply allows the SAKE device and the content server to complete an authentication handshake. The SAKE device is programmed to generate a device authentication reply is characteristics of and is recognizable by the particular content server. Therefore, the reply enables the server to verify that the SAKE device is properly assigned to the user for accessing restricted content on the server. In accordance with a preferred embodiment, the device authentication reply includes multiple authentication sequences, with each sequence being transmitted to the server separately. For example, after transmitting a first authentication sequence, the SAKE device can wait for a confirmation sequence from the server before transmitting the next sequence itself. Any number of sequences can be used in the authentication handshake, allowing for flexibility in customization. In a preferred embodiment, different content servers have different authentication handshakes with their corresponding SAKE devices, so that a given SAKE device assigned for a particular content server will be of no use in accessing restricted content on another content server.  
         [0088]     In step  1140 , the SAKE device receives a key request from the content server. In a preferred embodiment, the content server transmits a key request to the SAKE device when the authentication handshake described above in step  1135  is completed. In other words, when the content server has ascertained that the request for restricted content originates from a legitimate SAKE device properly assigned for that purpose, the server sends a key request to the SAKE device.  
         [0089]     In step  1145 , the SAKE device transmits a first key representative of the user&#39;s identity to the content server in response to the key request described in step  1140  above. This first key enables the server to confirm the user&#39;s identity. In a preferred embodiment, the first key is a public key (e.g., as used under the Public Key Infrastructure, or PKI) that uniquely identify the key holder to third parties, such as the content server in this case. In one embodiment, the public key is hashed using a secure hashing algorithm, preferably stored in a non-volatile solid-state memory, before transmission to the content server. It is appreciated that according to the present invention, the key verification can be performed by the content server itself or by a certifying authority (“CA”) on behalf of the content server.  
         [0090]     In step  1150 , the SAKE device receives the restricted content from the content server as requested. In one embodiment, the restricted content is received by the SAKE device as one or more data streams. In other words, the content is transmitted from the content server to the SAKE device by streaming.  
         [0091]     It should be appreciated that according to a preferred embodiment described above, the content server only sends the restricted content to the SAKE device after a successful biometric authentication of the user&#39;s identity, a successful authentication handshake between the content server and the SAKE device, and a successful verification of the user&#39;s identity using a unique key such as a public key. The tri-level authentication process of the present invention as described provided very strong security protection against unauthorized access of restricted content stored on the content server.  
         [0092]     In step  1155 , the SAKE device encrypts the content received from the content server In a preferred embodiment, the encryption is performed using a second key representative of the user&#39;s identity. In one embodiment, the second key is a private key assigned to the user.  
         [0093]     In step  1160 , the SAKE device stores the encrypted content in its memory. The stored content is secured against unauthorized access because it is in encrypted form and cannot be decrypted without the second key (e.g., private key) described above in step  1155 . In one embodiment, the encrypted content is stored in a non-volatile solid-state memory.  
         [0094]     In a preferred embodiment, the SAKE device includes one or more of a voltage detector, a frequency detector and a temperature detector (e.g., thermometer, thermostat) to further protect the stored information against tampering. These detectors monitor the operation parameters of voltage, frequency and temperature. It is appreciated that common hacking techniques involve altering the voltage, frequency and/or temperature of the environment in which a storage device operates in an attempt to gain unauthorized access to the stored data. Thus, according to this embodiment, when the detectors detects that one or more of the operation parameters fall beyond their normal operating ranges as specified, the SAKE device erases or otherwise destroy the encrypted data stored therein, and optionally the first key, the second key and the biometric template. This data self-destruction feature provides a last line of defense against unauthorized access of the restricted content stored in the SAKE device.  
         [0095]     Importantly, content received from the content server goes directly to the SAKE device and is not stored on the client computer in any form. The internet browser serves as a conduit of data transfer between the content server and the SAKE device. The data transfer is transparent to the user and the content is neither displayed to the user in the browser, nor is the content allowed to be stored on the client computer using the browser interface. In a preferred embodiment, data is transferred by streaming, which provides additional protection against hacking, as portions of a data stream cannot be meaningfully reassembled in case of malicious interception. In one embodiment, encrypted content received from the server is decrypted by the browser (using standard decryption protocols such as DES, AES, 3-DS) and then encrypted by the SAKE device using a private key before storing. In another embodiment, the encrypted content is passed as is to the SAKE device, which can performed additional decryption and/or re-encryption. The restricted content is stored within the SAKE device in encrypted form and cannot be replicated to another storage medium connected to the client computer. Moreover, retrieval of the data is only allowed when the user&#39;s identity is authenticated through the biometric detector and verification engine.  
         [0096]     Once the content is securely stored in the SAKE device, an authorized user can gain access to the content by a successfully passing the biometric authentication, thereby causing the SAKE device to decrypt the stored content and streaming it to the appropriate application program for processing. For example, a music file or a movie file is decrypted and streamed to a media player for playback. An executable file is decrypted and then run from the SAKE device. A document is decrypted for viewing by a viewer/word processing program straight from the SAKE device. Thus, the content remains in the SAKE device and the streaming of the data is under the control of the SAKE device so that unauthorized access is prevented. In another embodiment, the encrypted content is streamed for processing by the appropriate application program without being decrypted. In this embodiment, a customized application program capable of processing the encrypted content is provided.  
         [0097]     In the foregoing specification the invention has been described with reference to specific exemplary embodiments thereof. It will, however, be evident that various modifications and changes may be made thereto without departing from the broader scope of the invention. The specification and drawings are, accordingly, to be regarded in an illustrative rather than restrictive sense.