Electrical computers and digital processing systems: support – Data processing protection using cryptography – Computer instruction/address encryption
Reexamination Certificate
2006-12-12
2006-12-12
Arani, Taghi T. (Department: 2131)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
Computer instruction/address encryption
C713S177000, C713S189000, C713S193000, C713S194000, C726S016000, C711S163000, C711S164000, C711S167000
Reexamination Certificate
active
07149901
ABSTRACT:
A method and system for maintaining integrity and confidentiality of pages paged to an external storage unit from a physically secure environment. An outgoing page is selected to be exported from a physically secure environment to an insecure environment. An integrity check value is generated and stored for the outgoing page. In one embodiment, this takes the form of taking a one-way hash of the page using a well-known one-way hash function. The outgoing page is then encrypted using a cryptographically strong encryption algorithm. Among the algorithms that might be used in one embodiment of the invention are IDEA and DES. The encrypted outgoing page is then exported to the external storage. By virtue of the encryption and integrity check, the security of the data on the outgoing page is maintained in the insecure environment.
REFERENCES:
patent: 4847902 (1989-07-01), Hampson
patent: 5007083 (1991-04-01), Constant
patent: 5224166 (1993-06-01), Hartman, Jr.
patent: 5343527 (1994-08-01), Moore
patent: 5386469 (1995-01-01), Yearsley et al.
patent: 5412717 (1995-05-01), Fisher
patent: 5694569 (1997-12-01), Fischer
patent: 5757919 (1998-05-01), Herbert et al.
patent: 5768382 (1998-06-01), Schneier et al.
patent: 5825878 (1998-10-01), Takahashi et al.
patent: 5944821 (1999-08-01), Angelo
patent: 6708274 (2004-03-01), Herbert et al.
Smith, R. Internet Cryptography. pp. 1-6. Jul. 1997.
Business Wire, New York, Vormetric Extends Its CoreGuard.
E. Palmer, “An Introduction to Citadel—A Secure Crypto Coprocessor for Workstations,” IBM Thomas J. Watson Research Center, Version 1.00, Sep. 30, 1992.
B. Yee, “Using Secure Coprocessors,” School of Computer Science, Carnegie Mellon University, May 1994.
“VMS320—High Speed PCMCIA Security Token Cryptographic Engine,” VLSI Technology, Inc., 1997.
Davis Derek L.
Herbert Howard C.
LandOfFree
Cryptographically protected paging system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Cryptographically protected paging system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Cryptographically protected paging system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3700128