Electrical computers and digital processing systems: support – Data processing protection using cryptography
Reexamination Certificate
2005-12-27
2005-12-27
Smithers, Matthew (Department: 2137)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
C713S166000, C713S172000
Reexamination Certificate
active
06981149
ABSTRACT:
The invention enables a cryptographic device to be easily, securely and/or irreversibly customized to provide specified cryptographic functionality. For example, the invention can enable easy and secure modification (expansion, reduction or changing) of application code (which interacts with code stored on a cryptographic device) via the exposure of, for example, the mathematical primitive operations available on the cryptographic device. In particular, the invention can enable modification of available cryptographic operations at a relatively high level of programming abstraction, thus enabling such modification to be accomplished relatively easily. Further, the invention can enable the modification to be accomplished in a manner that does not necessitate or allow access by the application developer to other operations of the cryptographic device, thus providing security for the proprietary code and/or cryptographic keys of other persons or entities that may be present on the cryptographic device. The invention can also enable specification of permissible cryptographic characteristics of a cryptographic device from a set of available cryptographic characteristics of the cryptographic device. In particular, such specification can be done (at device fulfillment, for example) in a manner that is irreversible, thus enabling the cryptographic device to satisfy export regulations for cryptographic devices and/or to meet customer requirements for device security.
REFERENCES:
patent: 3962539 (1976-06-01), Ehrsam et al.
patent: 4918728 (1990-04-01), Matyas et al.
patent: 5007089 (1991-04-01), Matyas et al.
patent: 5802519 (1998-09-01), De Jong
patent: 5883956 (1999-03-01), Le et al.
patent: 5933503 (1999-08-01), Schell et al.
patent: 5988510 (1999-11-01), Tuttle et al.
patent: 6005942 (1999-12-01), Chan et al.
Menzes et al. “Handbook of Applied Cryptography”, CRC Press LLC, 1997, pp. 66-72.
Housley Russell D.
Piper Gregory W.
Sabett Randy V.
Graham David R.
Smithers Matthew
Spyrus, Inc.
LandOfFree
Secure, easy and/or irreversible customization of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Secure, easy and/or irreversible customization of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Secure, easy and/or irreversible customization of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3523002