P. C. Clark. BITS: A Smartcard Protected Operating System. PhD thesis, George Washington University, 1994.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....uses the application has to be trusted anyway. Research results in operating system security have shown that secure platforms can be build using modern operating system technology [23, 29, 17] Optionally, smartcards can be used if the protection of cryptographic keys is of special interest [10]. 2.2 DRM Platforms Digital technology and media o#er content providers and producers many business opportunities and users many advantages towards the realization of As an example, consider a signature application. No matter if the related security policy is implemented at the application ....

P. C. Clark and L. J. Ho#man. BITS: A smartcard protected operating system. Communications of the ACM, 37(11):66--70, Nov. 1994.

....sd more di#cult. Instead of o#ine inspection, suppose an attacker modifies the device and returns it to a user. Now the system may contain trojans, nullifying all protections a#orded by ZIA. Any device that is stolen, and later recovered, should be regarded as suspect and not used. Secure booting [6, 14] can be used to guard against this attack. Disk Laptop VFS Page Cache ZIA Underlying FS Key Cache Keyiod Client Keyd Server Token Kernel Module This figure shows ZIA s design. The kernel module handles cryptographic file I O. The authentication client and server manage key ....

P. C. Clark and L. J. Ho#man. BITS: A Smartcard protected operating system. Communications of the ACM, 37(11):66--70, 1994.

....the exciting potential of the secure coprocessing model arises from the notion of putting computation as well as cryptographic secrets inside the secure box. Yee s seminal examination of this model [26] built on our Citadel prototype. Follow up research by Tygar and Yee [21, 27] and others (e.g. [9, 13, 17]) further explores the potential applications and limits of the secure coprocessing model. 1.2. The Challenge This research introduced the challenge: how do we make this vision real Widespread development and practical deployment of secure coprocessing applications requires an infrastructure of ....

....carefully focused radiation. # Radiation sufficiently strong to alter bits should also trigger tamper response. Consequently, securely bootstrapping a custom designed, tamper protected device is easier than the general problem of securely bootstrapping a general purpose, exposed machine (e.g. [4, 9, 26]) Execution Sequence Our boot sequence follows from a common sense assembly of our basic techniques. Hardware reset forces execution to begin in Miniboot 0 in ROM. Miniboot 0 begins with Power on Self Test 0 (POST0) which evaluates the hardware required for the rest of Miniboot 0 to execute. ....

P. C. Clark and L. J. Hoffmann. "BITS: A Smartcard Protected Operating System." Communications of the ACM. 37: 66-70. November 1994.

....[TyYe91, Yee94] IC chip cards are finding applications in numerous social and financial applications: to support telephone cards, bus fares, and credit cards. Additionally, Paul Clark and Lance Hoffman at George Washington University explored using IC chip cards to secure operating systems. [ClHo94] The NSA has explored the use of portable Fortezza cards as part of their Multilevel Information Systems Security Initiative (MISSI) intended to use trusted systems and secure coprocessors to interconnect systems of more than one Orange Book security level. National Semiconductor and Xerox ....

P. C. Clark and L. J. Hoffmann. "BITS: A Smartcard Protected Operating System." Communications of the ACM. 37: 66-70. November 1994.

....these keys; and these adver saries may include the end user of the application. The potential of both buildinghigh performance programmable secure coprocessors, as well as using such platforms to build secure applications, have been long standing areas of research, both at our laboratory (e.g. [1, 2, 10, 14, 15, 21, 22]) and elsewhere (e.g. 9, 17, 18, 19, 20] In order for secure coprocessing technology to enable real solutions in the real world, we felt that a flexible, generic platform must exist as a mass produced product, not just a hand built laboratory prototype. This platform must provide: # physical ....

P. C. Clark and L. J. Hoffmann. "BITS: A Smartcard Protected Operating System." Communications of the ACM. 37: 66-70. November 1994.

....[TyYe91, Yee94] IC chip cards are finding applications in numerous social and financial applications: to support telephone cards, bus fares, and credit cards. Additionally, Paul Clark and Lance Hoffman at George Washington University explored using IC chip cards to secure operating systems. [ClHo94] The NSA has explored the use of portable Fortezza cards as part of their Multilevel Information Systems Security Initiative (MISSI) intended to use trusted systems and secure coprocessors to interconnect systems of more than one Orange Book security level. National Semiconductor and Xerox ....

P. C. Clark and L. J. Hoffmann. "BITS: A Smartcard Protected Operating System." Communications of the ACM. 37: 66-70. November 1994.

....the secure coprocessor should control the boot process verifying each component prior to its use. Yee states that boot ROM modifications may be required, but since a prototype secure boot process was never implemented more implementations questions are raised than answered by his discussion. Clark [5] presents a secure boot process for DOS that stores all of the operating system bootstrap code on a PCMCIA card. He does not address the verification of any firmware (system BIOS or expansion cards) Clark s model, however, does permit mutual cryptographic authentication between the user and the ....

Clark, P. C. BITS: A Smartcard Protected Operating System. PhD thesis, George Washington University, 1994.

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P. C. Clark. BITS: A Smartcard Protected Operating System. PhD thesis, George Washington University, 1994.

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L. Clark and L.J. Hoffmann. "BITS: A Smartcard Protected Operating System." Communications of the ACM. 37: 66-70. 1994.

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P. C. Clark and L. J. Hoffmann. "BITS: A Smartcard Protected Operating System." Communications of the ACM. 37: 66-70. November 1994.

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