System and method for secure encryption

Details System and method for secure encryption System and method for secure encryption

2004-08-13

2009-08-04

Smithers, Matthew B (Department: 2437)

Cryptography

Particular algorithmic function encoding

C380S030000, C713S156000, C713S157000, C713S160000, C713S161000, C713S168000, C713S176000, C713S177000, C713S178000, C713S180000, C713S181000

Reexamination Certificate

active

07570759

ABSTRACT:
A method for encrypting a message containing a plurality of message segments is described. First, a key is input into a SHA function to generate a first hash value. Then, a first message segment is encrypted into a first cipher segment by use of a part of the first hash value. Next, the first message segment and the first hash value are input into the SHA function to generate a second hash value. Following that, the second message segment is encrypted into a second cipher segment by use of a part of the second hash value. Subsequently, next message segment is repeatedly encrypted and input into the SHA function to generate a next cipher segment and a next hash value, respectively, until the last message segment is encrypted and the last hash value is generated.

REFERENCES:
patent: 5956404 (1999-09-01), Schneier et al.
patent: 2006/0036857 (2006-02-01), Hwang
patent: WO 03096585 (2003-11-01), None
David Lie, Chandramohan A. Thekkath, Mark Horowitz, “Implementing an untrusted operating system on trusted hardware”, Dec. 2003, SOSP '03: Proceedings of the nineteenth ACM symposium on Operating systems principles, Publisher: ACM, pp. 178-192.

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