Abstract:
A system, process and method for data encryption and transmission are disclosed. By adopting the paradigm of a pre-paid self addressed express envelope end-users will interact with this invention in much the same way they interact with traditional delivery systems. They simply provide the content, and delivery takes place without any further user intervention. The encryption is a “software appliance”. This software already knows the identity of the sender and the receiver and the encryption key that is to be used; all it needs from the user is the information which is to be securely transported.

Description:
CLAIM OF PRIORITY 
     This application claims priority of Provisional Application Ser. No. 60/305,216 entitled METHOD, SYSTEM AND PROCESS FOR DATA ENCRYPTION AND TRANSMISSION, filed Jul. 13, 2001. 
    
    
     FIELD OF THE INVENTION 
     This invention relates generally to the field of information handling and more specifically to a method and system for data encryption and transmission. Even the best encryption system can&#39;t protect data if it is too difficult and or time consuming for the end user to use. This invention focuses on making secure data transmission drag and drop simple by adopting the paradigm of a pre-paid self addressed express envelope or courier. 
     BACKGROUND OF THE INVENTION 
     The security of information poses challenges for businesses and other organizations that transmit and store information. Data encryption is intended to transform data into a form readable only by authorized users. However a large majority of information is not encrypted due to the difficulty or inconvenience of using most encryption software. In light of this the need has arisen to develop encryption into a “software appliance”. This software knows the identity of the sender and the receiver and the encryption key that is to be used; all it needs from the user is the information which is to be securely transported. By adopting the paradigm of a pre-paid, self addressed express envelope end users will interact with this invention in much the same way they interact with traditional delivery systems that simply provide for the delivery and take place without any further user intervention. 
     SUMMARY OF THE INVENTION 
     This invention is primarily a process to make using strong encryption (such as described in U.S. patent application Ser. Nos. 09/797,272 09/797,066 09/797,107 09/797,068 09/797,079 09/796,694) easier for end users. In doing so it leverages the wide-spread availability of public information networks to rapidly deliver private content to a predetermined recipient. This software encryption appliance is designed around the look and feel of a pre-paid pre-addressed express delivery envelope similar to those used every day in such industries as accounting, legal and financial. When an accountant, lawyer, broker or other professional needs to get high-value, confidential correspondence from a client, it is accepted practice to provide the client with pre-addressed pre-paid express envelopes from some commercial overnight or express delivery service. This invention seeks to translate this process into the digital world. A client would be provided with a computer program whose graphical user interface (GUI) resembles an addressed envelope. In order to send a secure communication to the providing professional service “PPS”, the client merely has to “drag and drop” the intended document into the appropriate desktop Icon. This process is far easier and more streamlined than email programs that use the so called public key infrastructure. After dropping a file on the icon, a confirm box pops up. After confirming the intention to send, there is no other intervention needed on the user&#39;s part. This eliminates the hassle of public key management, prevents misdirected communications and assures that the delivery will take place without the confidentiality of the message being compromised. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       For a more complete understanding of the present invention and for further features and advantages, reference is now made to the following description, taken in conjunction with the accompanying drawings, in which: 
         FIG. 1  This figure is a schematic diagram that shows the various parts of the envelope administration software; 
         FIG. 2  This figure is a flow chart illustrating the operation of the envelope administration software; 
         FIG. 3  This figure shows is a schematic diagram illustrating the various parts of the digital envelope software; 
         FIG. 4  This figure is a flow chart illustrating the operation of the digital envelope software; 
         FIG. 5  This figure is a series of screen captures that demonstrates the process of creating a digital envelope with the envelope administrator. The graphical user interface prominently displays a graphical representation of a traditional mailing envelope; 
         FIG. 6  This figure is a series of screen captures that demonstrates the process of pulling up a previously created digital envelope from the data base file; 
         FIG. 7  This figure is a series of screen captures that demonstrates the process of dragging and dropping a digital document over the digital envelope. The graphical user interface prominently displays a graphical representation of a traditional mailing envelope, as well as a send or cancel button; and 
         FIG. 8  This figure is a series of screen captures that demonstrates the process of double clicking on the digital envelope to launch the graphical user interface which prominently displays a graphical representation of a traditional mailing envelope. From here secure messages can be encrypted and sent to compatible locations. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT 
     This invention is primarily a process to make using strong encryption (such as described in co-pending commonly assigned U.S. patent applications identified as Ser. Nos. 60/226,400 09/797,272 09/797,066 09/797,107 09/797,068 09/797,079 09/796,694) easier for end-users, the teachings of which are incorporated herein by reference. This software encryption appliance is designed around the look and feel of a pre-paid pre-addressed express delivery envelope similar to those used every day in such industries as accounting, legal and financial. When an accountant, lawyer, broker or other professional needs to get high-value, confidential correspondence from a client, it is accepted practice to provide the client with pre-addressed pre-paid, express envelopes from some commercial overnight or express delivery service. This invention seeks to translate this process into the digital world. 
     This process has two main components. The first component is the creation and distribution of a pre-addressed digital envelope. The second portion is the digital envelope itself. This envelope allows drag and drop encryption and transmission back to the distributing party. This digital envelope also has the ability to decrypt and display return correspondence or files. 
     Envelope creation is handled by an administration program that allows the creation and assignment of encryption such as disclosed in the cross referenced patent application Ser. Nos. 09/797,079 and 09/796,694, keys and the management of distribution lists or groups. To facilitate ease of use, the user interface for envelope creation contains elements that simulate the look and feel of a traditional mailing envelope. In one commercial implementation model the administration program assigns a number of uses to the digital envelope that counts down. This information appears in the area where stamps would be placed on a traditional envelope. The “TO” and “FROM” fields of the envelope are filled out prior to distribution. Typically, the envelope provider puts their own information in the “TO” field and their client&#39;s information in the “FROM” field. A key is assigned to the envelope and the creation time along with all other relevant information is logged for auditing purposes. The envelope is generated and distributed by some suitable trusted means generally to the party listed in the “FROM” field. 
     An end user is provided with a computer program from some party who wishes to receive confidential communications. The program sets itself up as a desktop icon that resembles an envelope. Any file dragged over and dropped on the envelope is copied, encrypted and sent to whatever address was embedded in the envelope at the time of creation. After confirming the intention to send, there is no other intervention needed on the user&#39;s part. This eliminates the need for public key management and prevents misdirected communications. Since the communications are secured with the strong encryption technology, such as disclosed in the cross referenced patent application Ser. Nos. 60/226,400 09/797,272 09/797,066 09/797,107 09/797,068 09/797,079 09/796,694, there is assurance that the delivery will take place without the confidentiality of the message being compromised. 
     In the current operational mode of the present invention, referred to as Asier Digital Courier, there consists of two different pieces of software. The first is an administrative tool that has the ability to create secure communication channels. This application is referred to as an “Envelope Administrator” or server.  FIGS. 1 and 2  depict the inner workings of the server and  FIG. 5  deals with the actual use of the server to create a second type of software, a client or digital envelope.  FIGS. 3 and 4  deal with the working of the client and  FIGS. 6 ,  7  and  8  show its operation in sending and receiving secure messages. 
     As illustrated in  FIG. 1 , the server software is made up of numerous elements. The Envelope Administrator (ELEMENT  100 ) is the central logic that controls everything, and receives user input/output at  119 . The Envelope Administrator interacts with all the various modules and databases. A data compression module (ELEMENT  121 ) is adapted to reduce the size of incoming data. An encryption/decryption module (ELEMENT  120 ) is adapted to encrypt all database records stored on the local drive and all information sent over the network. A MAPI (Messaging Application Programming Interface) interfaces (ELEMENTS  116  and  123 ) so that the server application can access the address books of third party MAPI compliant e-mail application and use the IN/OUT Boxes of such applications for message handling. Additional network flexibility is in the form of a standard POP (Post Office Protocol)/SMTP (Simple Mail Transfer Protocol) interface (ELEMENT  122 ) that allows the envelope administrator to distribute client envelopes and send/receive messages directly to compatible network servers  125  via network input/output module  124  even when MAPI compliant e-mail applications are unavailable. The envelope server software is distinguished from the client software in several important ways. The administrator/server gets its name from its ability to generate subordinate client applications, and this is possible due to the envelope and key generator modules (ELEMENTS  115  and  117 ). For business reasons the total number of clients (or envelopes) issued is adapted to be monitored and controlled with the Audit Report Generator (ELEMENT  118 ). In some instances the administrator may produce envelopes with a limited number of uses, while in other scenarios the administrator can only produce a limited number of client envelopes. The results are stored securely within the Auditing Database (ELEMENT  114 ). ELEMENT  110  depicts a key database module, ELEMENT  112  is an address database module, and ELEMENT  113  shows an envelope database module. 
     The envelope (client) creation process is detailed in  FIG. 2 . At the beginning  200  of this process a determination is made about the availability a MAPI compliant e-mail application (ELEMENT  210 ). If such an application is present, then the server can use the MAPI address book for envelope creation, and steps  212 - 217 , and  220 - 229 ,  235  are executed (ELEMENT  211 ). The “TO” and “FROM” information can be populated from internal databases (ELEMENTS  231  and  232 ), external (MAPI) address books  FIG. 1  (ELEMENT  111 )  FIG. 5  (ELEMENT  517 ) or manually  FIG. 5  (ELEMENT  518 ). It is important to remember that the server has complete control over the operation of the envelope and that the eventual user of the client cannot change the destination key or any other feature of the envelope. An existing encryption key may be selected (ELEMENT  233 ), or a new one may be created and named (ELEMENT  218 ). The user has the opportunity to continue or cancel (ELEMENT  219 ). If the user continues, relevant information is stored encrypted in the appropriate databases (ELEMENTS  231 ,  232 ,  233  and  234 ) and a client envelope application is created. The envelope is sent over a network (ELEMENT  230 ) or stored locally for other distribution  FIG. 5  (ELEMENT  526 ). 
     The client envelope software detailed in  FIG. 3  is highly reminiscent of the server software from  FIG. 1 . The most important difference is that the envelope database contains the key and address databases and is not alterable (ELEMENTS  300 ,  310  and  311 ). The client can necessarily compress decompress, encrypt and decrypt with the same modules (ELEMENTS  314  and  315 ) as the server software. The client also has the same network (ELEMENT  319 ) access choices (ELEMENTS  316  and  317 ) as the server which are accessible via network input/output module  318 . Envelope creation module  313  receives user input/output  312 . 
     There is little difference between how a server sends a client envelope and how either a client or a server sends a secure message. As shown in  FIG. 4  the process begins at  400  with checking for MAPI compliant e-mail clients at steps  410  and  411 . If no MAPI e-mail applications are present, the MAPI function is disabled at  420 . Next, an envelope must be selected (ELEMENTS  412 ,  421 ,  422 ,  429 ,  413  and  414 ). If only one envelope exists (as in a client), then this process is greatly simplified (ELEMENT  413 ). The envelope contains the necessary information about keys and addresses (ELEMENTS  423 ,  430  and  431 ). A user may append files or add text message to be encrypted and sent (ELEMENT  415 )  FIG. 6  (ELEMENTS  622  and  623 ). The user is given a choice to continue or abort (ELEMENT  424 ). If the user continues, the program checks to see if the licensing rules are being followed (ELEMENT  425 ). If user does not continue, the program ends at  432 . All data is compressed and encrypted (ELEMENT  416 ). Next, a network status check is made at  417 . If the network is available the secure message is sent immediately (ELEMENT  426 ). If no network is available and MAPI is present at  417 , the message is placed in the MAPI compliant application&#39;s OUT Box for later delivery (ELEMENT  418 ) and the process ends at  419 . After the message is delivered a sweep of network POP3 servers and or local MAPI IN Boxes is made for any pending incoming secure mail (ELEMENT  427 ). Any waiting incoming encrypted messages are moved (ELEMENT  433 ) decrypted (ELEMENTS  434  and  435 ) and displayed for the user  FIG. 8  Part  2 , and the process ends at  436 . If there are no awaiting incoming encrypted messages at  427 , the process ends at  428 . 
     The creation of digital courier client envelopes is designed to be very simple for the user, as shown in  FIG. 5 . From the main screen, the “Envelope” is clicked at the menu on the tool bar and the “Create Courier Envelope” (ELEMENT  510 ) is selected. Screen  1  of the envelope creation tool (ELEMENT  511 ) pops up. In most cases it will already have the server&#39;s return address (ELEMENT  512 ). The graphic user interface is designed around the paradigm of a business reply envelope (ELEMENT  513 ). An envelope may be created for an individual or a group (ELEMENT  514 ). The number of envelopes remaining for a particular server may be shown next to the stamp graphic or in it&#39;s own text field (ELEMENT  515 ). The client&#39;s address (ELEMENT  516 ) can be selected form an address book (ELEMENT  517 ) or manually entered in the space provided (ELEMENT  518 ). “Next” brings the user to screen  2  of the envelope creation tool (ELEMENT  519 ) pops up. Encryption keys may be created and named (ELEMENT  520 ) or selected from a database (ELEMENT  521 ). Additionally, a password (or phrase) for initial (one time) key exchange and installation may be added for extra security (ELEMENT  522 ). The third and final envelope creation screen (ELEMENT  523 ) allows the user to select the delivery method. A user can choose to send the envelop as an executable file or a zip file (ELEMENT  526 ). Due to firewall issues a zip file is usually preferred. This compressed and encrypted file can be e-mailed across the network, or it could be saved to some other location for other delivery means (ELEMENT  526 ). Finally, after the file is sent, the user receives a confirmation message (ELEMENT  528 ). Element  524  depicts a key, element  525  depicts an envelope destination field, and element  527  depicts the finish. 
     There are a variety of ways to invoke digital courier to send a message as  FIGS. 6 and 7  show. The “New Message” button (ELEMENT  610 ) may be clicked or a file (ELEMENT  700 ) may be dragged over the Digital Courier short cut (ELEMENTS  711 ,  712  and  713 ). In either case, the “Dispatch Secure Courier” screen (ELEMENT  611 ) pops up. If more than one envelop exists then selection can be made from a drop down list (ELEMENT  617 ) or page arrows (ELEMENT  619 ). Once the envelope is selected the FROM (ELEMENT  612 ), TO(ELEMENT  614 ), and KEY fields are set. Attachments can be added (ELEMENT  620 ) and messages can be typed (ELEMENT  622 ). Administrators with the server application can customize the look of the envelope (ELEMENT  621 ) by adding graphics (ELEMENT  618 ) that can be seen on the server and on the client. An administrator can customize an envelope so that the client sees a picture of the administrator (and perhaps a marketing message) while the server sees a picture of the client so as to ensure the correct envelope is selected for delivery. Element  613  depicts a digital envelope, element  615  depicts a reference number, element  616  depicts a subject field, and element  624  depicts a dispatch courier. Element  714  depicts a dispatch secure courier window, element  715  depicts a “FROM” field, element  716  depicts a “TO” field and element  717  depicts a “MESSAGE” field. Element  718  depicts a “SUBJECT” field, element  719  depicts an “ATTACH” field, and element  720  depicts a “FORWARD and REVERSE” arrow. Element  721  depicts a company logo, element  722  depicts an “ADD ATTACHMENT” button, element  723  depicts an “EDIT RECIPIENT LOGO&#39;s” button, and  724  depicts a “DISPATCH COURIER” button. 
     Advantageously, reading encrypted messages is no more difficult with Asier Digital Courier than reading normal email. As shown in  FIG. 8 , simply double click on the shortcut (ELEMENTS  810  and  811 ) and the main viewer screen opens. Multiple folders (ELEMENT  812 ) are provided for moving (ELEMENT  816 ) sorting and storing messages. Normal e-mail function like “Reply” (ELEMENT  813 ), “Forward” (ELEMENT  814 ), “Split Preview” (ELEMENT  818 ) and “Address Book” (ELEMENT  819 ) are fully supported. A list of stored messages (ELEMENT  815 ) allows the user to pick a message that is stored encrypted and have it immediately decrypted and displayed (ELEMENT  822 ). Attachments (ELEMENT  820 ) are stored encrypted in Digital Courier and decrypted when they are clicked on. Element  821  depicts a “FROM” and “TO” field, along with a “SUBJECT” field. 
     It is important to note that Digital Courier has a host of additional security features that are not obvious. All Digital Courier databases (address, key, envelope, message and attachments) are stored encrypted on the hard drive. Strong password access is available for application launch. When a client user is attempting to install a client envelope a search of the registry is made. If the email address and name provided by the server are not present in the client&#39;s registry the installation is aborted and the envelope will not deploy. The digital courier reader application will not support scripts, DHTML or Java code, and this is to prevent a possible infected file from gaining a foothold. All attachments are stored in an encrypted “inert state.” mail cannot be misdirected. 
     Though the invention has been described with respect to a specific preferred embodiment, many variations and modifications will become apparent to those skilled in the art upon reading the present application. It is therefore the intention that the appended claims be interpreted as broadly as possible in view of the prior art to include all such variations and modifications.