Method for session security

Details Method for session security Method for session security

2007-06-19

2010-12-07

Chen, Shin-Hon (Department: 2431)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C713S155000, C713S170000, C713S181000, C713S182000, C380S028000, C380S030000

Reexamination Certificate

active

07849318

ABSTRACT:
A secret string is established so as to be known only to a client computing system and a server computing system. A non-encrypted version of a message, a message counter value, and first hash value are received by the server computing system from the client computing system. The first hash value, based on a content of the message, the message counter value, and the secret string, is generated at the client computing system using a first hash algorithm. Using the first hash algorithm, the server generates second hash value based on the content of the received message, the received message counter value, and the secret string. The server computing system accepts the received non-encrypted version of the message as authentic upon determining that the received message counter value is greater than a previously received message counter value and that the second hash value matches the first hash value.

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