Abstract:
Methods and arrangements for ensuring that, when a computer system is stolen or otherwise misplaced, the system is rendered unusable (i.e., locked down). Conventional solutions have required software running on the system to perform the lockdown action, but in accordance with at least one preferred embodiment of the present invention is the linkage of TPM (Trusted Platform Module) and AMT (Active Management Technology) solutions whereby an AMT arrangement can remove secure data or identifiers so that any encrypted data present on the system will become unusable.

Description:
FIELD OF THE INVENTION 
       [0001]    The present invention relates generally to computer systems and to methods and arrangements for disabling critical components of the same. 
       BACKGROUND OF THE INVENTION 
       [0002]    When a computer system is stolen or otherwise misplaced, it desirable to render the system unusable (i.e., lock it down). This applies most readily to such as a laptop computer systems (alternatively, notebook or tablet computer systems), but also can apply to desktop computer systems Conventional solutions have required software running on the system to perform the lockdown action. A tremendous disadvantage is found here in that, should an unauthorized user be in a position to access this software after stealing the computer, the software can easily be disabled, removed and/or replaced, thus allowing the unauthorized user to easily restart and make use of the computer. 
         [0003]    Accordingly, a highly compelling need has been recognized in connection with providing methods and arrangements for locking down a computer system that are not reliant upon software running on the system itself. 
       SUMMARY OF THE INVENTION 
       [0004]    Broadly contemplated herein, in accordance with at least one presently preferred embodiment of the present invention, is the linkage of TPM (Trusted Platform Module) and AMT (such as iAMT [Intel Active Management Technology]) solutions whereby an AMT arrangement can remove secure data or identifiers so that any encrypted data present on the system will become unusable. 
         [0005]    In summary, one aspect of the invention provides a method comprising: detecting a computer system connection to a network; thereafter remotely disabling a computer system component taken from the group consisting essentially of: an encryption component, and a security-based component; the disabling being performed when the computer system is not fully booted. 
         [0006]    Another aspect of the invention provides a system comprising: a main memory; a network interface which connects with a network; and an arrangement for effecting disablement of a system component responsive to a network command; the arrangement for effecting disablement acting to disable a computer system component taken from the group consisting essentially of: an encryption component, and a security-based component; the arrangement for effecting disablement acting to disable the system component when the system is not fully booted. 
         [0007]    Furthermore, an additional aspect of the invention provides a program storage device readable by machine, tangibly embodying a program of instructions executable by the machine to perform a method comprising: detecting a computer system connection to a network; thereafter remotely disabling a computer system component taken from the group consisting essentially of: an encryption component, and a security-based component; the disabling being performed when the computer system is not fully booted. 
         [0008]    For a better understanding of the present invention, together with other and further features and advantages thereof, reference is made to the following description, taken in conjunction with the accompanying drawings, and the scope of the invention will be pointed out in the appended claims. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0009]      FIG. 1  schematically illustrates a computer system with added components. 
           [0010]      FIG. 2  schematically illustrates a ME and components. 
           [0011]      FIG. 3  schematically illustrates a process flow for disabling critical computer system components. 
       
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
       [0012]    For a better understanding of the present invention, together with other and further features and advantages thereof, reference is made to the following description, taken in conjunction with the accompanying drawings, and the scope of the invention will be pointed out in the appended claims. 
         [0013]    It will be readily understood that the components of the present invention, as generally described and illustrated in the Figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following more detailed description of the embodiments of the apparatus, system, and method of the present invention, as represented in  FIGS. 1 through 3 , is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. 
         [0014]    Reference throughout this specification to “one embodiment” or “an embodiment” (or the like) means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrases “in one embodiment” or “in an embodiment” in various places throughout this specification are not necessarily all referring to the same embodiment. 
         [0015]    Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided, such as examples of programming, software modules, user selections, network transactions, database queries, database structures, hardware modules, hardware circuits, hardware chips, etc., to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring aspects of the invention. 
         [0016]    The illustrated embodiments of the invention will be best understood by reference to the drawings, wherein like parts are designated by like numerals or other labels throughout. The following description is intended only by way of example, and simply illustrates certain selected embodiments of devices, systems, and processes that are consistent with the invention as claimed herein. 
         [0017]    Referring now to  FIG. 1 , there is depicted a block diagram of an illustrative embodiment of a computer system  12 . The illustrative embodiment depicted in  FIG. 1  may be a notebook computer system, such as one of the ThinkPad® series of personal computers sold by Lenovo (US) Inc. of Morrisville, N.C., however, as will become apparent from the following description, the present invention is applicable to any data processing system. Notebook computers may alternatively be referred to as “notebooks”, “laptops”, “laptop computers” or “mobile computers” herein, and these terms should be understood as being essentially interchangeable with one another. 
         [0018]    As shown in  FIG. 1 , computer system  12  includes at least one system processor  42 , which is coupled to a Read-Only Memory (ROM)  40  and a system memory  46  by a processor bus  44 . System processor  42 , which may comprise one of the AMD™ line of processors produced by AMD Corporation or a processor produced by Intel Corporation, is a general-purpose processor that executes boot code  41  stored within ROM  40  at power-on and thereafter processes data under the control of operating system and application software stored in system memory  46 . System processor  42  is coupled via processor bus  44  and host bridge  48  to Peripheral Component Interconnect (PCI) local bus  50 . 
         [0019]    PCI local bus  50  supports the attachment of a number of devices, including adapters and bridges. Among these devices is network adapter  66 , which interfaces computer system  12  to a LAN, and graphics adapter  68 , which interfaces computer system  12  to display  69 . Communication on PCI local bus  50  is governed by local PCI controller  52 , which is in turn coupled to non-volatile random access memory (NVRAM)  56  via memory bus  54 . Local PCI controller  52  can be coupled to additional buses and devices via a second host bridge  60 . 
         [0020]    Computer system  12  further includes Industry Standard Architecture (ISA) bus  62 , which is coupled to PCI local bus  50  by ISA bridge  64 . Coupled to ISA bus  62  is an input/output (I/O) controller  70 , which controls communication between computer system  12  and attached peripheral devices such as a keyboard and mouse. In addition, I/O controller  70  supports external communication by computer system  12  via serial and parallel ports. A disk controller  72  is in communication with a disk drive  200 . Of course, it should be appreciated that the system  12  may be built with different chip sets and a different bus structure, as well as with any other suitable substitute components, while providing comparable or analogous functions to those discussed above. 
         [0021]    Indicated at  202  is a ME (management engine) which may be employed in accordance with at least one presently preferred embodiment of the present invention. ME&#39;s, as currently evolving (examples of which are being manufactured by Intel), are inclusive of several useful components that previously were operationally segregated. By integrating such components operationally, they can be more readily and flexibly managed to address contingent problems such as shutting down at least portions of a computer when the computer is in the hands of an unauthorized user. With regard to the system  12  shown in  FIG. 1 , the ME may be located on the ISA bus  62  as shown. It should be understood that the system  12  of  FIG. 1  provides but one illustrative and non-restrictive example among a very wide variety of systems that can employ an ME in accordance with embodiments of the present invention. 
         [0022]    As shown schematically in  FIG. 2 , ME  202  may preferably include a Trusted Platform Module (TPM)  204 , Active Management Technology (AMT)  206  (which preferably is embodied by Intel AMT, or iAMT) and one or more security-based components  208  such as (but of course not limited to) fingerprint matching software. It will be noted, for the purposes of ongoing discussion herein, that those AMT&#39;s (and related software) and TPM&#39;s as manufactured by Intel are often referred to as “iAMT” and “iTPM” Background information regarding AMT may be found at www.intel.com/software.amt2, while background information regarding TPM&#39;s may be found at the Trusted Computing Group website, www.trustedcomputinggroup.org. Background information on fingerprint readers and software may be found at http://www.pc.ibm.com/us/security/fingerintreader.html. 
         [0023]    It should be appreciated an AMT enabled computer, such as iAMT enabled computer, will contain a Management Engine (ME) which comprises a service processor, dedicated firmware for the service processor, and logic in an Ethernet and/or 802.11 and/or WAN controller to allow the ME to talk to other locations across the internet even when the system is off, as these parts will always have power (i.e., very little power is required). Accordingly, one may send items to the ME  202 , and it can process and return items irrespective of whether the main operating system (OS) is running or not running. Thus, ME  202  enables contact with a network even when the system is technically off. Preferably, ME  202  is configured to disable one or more critical components of system  12  responsive to commands received from a network  210  (e.g., from a “mother” computer or system connected into network  210 ). The network interface can be realized directly or indirectly via essentially any suitable arrangement, e.g., a network adapter such as that indicated at  66  in  FIG. 1 . 
         [0024]    As such, and as alluded to hereinabove, ME  202  will preferably be in a position to activate or deactivate any of several security arrangements which themselves have hitherto been functionally segregated. Accordingly, ME  202  preferably is configured to disable either or both of the following: an authorization key  212  associated with TPM  204  and the functionality of security-based component  208  (e.g., fingerprint matching software, which interacts with a fingerprint reader to enable some level of access to system  12 , e.g., via release of a hard-disk password responsive to a positive fingerprint match). Other types of security-based components could include, but certainly are not limited to, iris readers and power-on passwords. As such, ME  202  facilitates the communication with a network that would enable commands to be received to disable either or both of TPM  204  and security-based component  208  as just described, and also applies such commands within the ME  202  to carry out the disabling action itself. 
         [0025]    Preferably, the authorization key  212  associated with TPM  204  is a Storage Root Key (SRK), itself well-known and described in detail at the above-referenced Trusted Computing Group website. As is known, an SRK is a critical encryption key that controls and enables all other encryption keys associated with a TPM; accordingly, by shutting down any functionality of SRK  212 , it will not be possible for an unauthorized user to decrypt any other keys (herein, indicated at  212   a ) of TPM  204 . (Essentially, the SRK  212  serves as a “private” portion of a “public/private” key pair, wherein the “public” portion is a function-specific key also contained within the TPM  204 . The non-SRK keys  212   a  of the TPM  204  will thus be rendered completely useless [preferably through action of iAMT  206 ] if not able to be paired with the SRK  212  by whatever means that an unauthorized user might attempt.) 
         [0026]    Likewise, security-based component  208  can be suitably disabled by AMT  206 ME  202  in response to a command received by AMT  206  over network  210 . As such, for example, AMT  206  can shut down any fingerprint matching or authorization software to avert the possibility that an authorized user&#39;s genuine fingerprint(s) were unknowingly expropriated to help an unauthorized user gain access to system  12 . 
         [0027]    It will be appreciated from the foregoing that, in accordance with at least one presently preferred embodiment of the present invention, there is broadly contemplated the selective remote disabling of a computer system when the computer system is connected to a network. (The network connection, for its part, could conceivably be hard-wired or wireless.) This disabling takes place without the need to boot the system (i.e., without the system&#39;s full processing power). 
         [0028]      FIG. 3  schematically illustrates a process for undertaking the actions described hereinabove. The process starts when, after theft or inadvertent removal or misplacement, a system is connected to a network ( 320 ). At a “mother” computer or system, a singular call or periodic calls ( 322 ) are sent out (via known arrangements) to ascertain that the system is indeed connected. If ( 324 ) indeed a connection (or interface) of the sought system is detected, then a command is sent to the system to disable one or more critical components as discussed heretofore ( 326 ). Finally, the system will preferably send a return signal ( 328 ) to confirm that the disablement is complete. 
         [0029]    By way of further elaboration and clarification, it is conceivable to disable one critical component, more than one critical component, or all available critical components via methods and arrangements as broadly contemplated herein. Thus, drawing on the example of  FIG. 2 , a SRK  212  could be disabled, a security-based component  208  (such as fingerprint matching software) could be disabled, or both could be disabled (possibly in addition to one or more other critical components that might be disabled). 
         [0030]    By way of further background information, software which enables a computer system to make itself known to a network once connected to a network is well known; for example, Absolute Software manufactures “COMPUTRACE” software for this purpose. “COMPUTRACE” also requires a BIOS to boot, however, whereas solutions in accordance with at least one embodiment of the present invention do not require BIOS and can work with the system being off as long as the iAMT system is running. This is software that is difficult to remove from a system but, once the system is connected into a network, nonetheless enables contact with a “mother” computer or system on the network without the need for system booting. 
         [0031]    It is to be understood that the present invention, in accordance with at least one presently preferred embodiment, includes elements that may be implemented on at least one general-purpose computer running suitable software programs. These may also be implemented on at least one Integrated Circuit or part of at least one Integrated Circuit. Thus, it is to be understood that the invention may be implemented in hardware, software, or a combination of both. 
         [0032]    If not otherwise stated herein, it is to be assumed that all patents, patent applications, patent publications and other publications (including web-based publications) mentioned and cited herein are hereby fully incorporated by reference herein as if set forth in their entirety herein. 
         [0033]    Although illustrative embodiments of the present invention have been described herein with reference to the accompanying drawings, it is to be understood that the invention is not limited to those precise embodiments, and that various other changes and modifications may be affected therein by one skilled in the art without departing from the scope or spirit of the invention.