Use of variant and base keys with two entities

Details Use of variant and base keys with two entities Use of variant and base keys with two entities

2004-05-27

2009-12-08

LaForgia, Christian (Department: 2439)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

Particular communication authentication technique

C380S044000

Reexamination Certificate

active

07631190

ABSTRACT:
A first entity configured to authenticate a digital signature supplied by a second entity, wherein one of the entities includes a base key and the other of the entities includes a variant key and a bit-pattern, the variant key being based on the result of applying a one way function to the base key and the bit-pattern, the digital signature having been generated by the second entity using its key to digitally signing at least part of data to be authenticated, the first entity being configured to:(a) receive the digital signature from the second entity;(b) receive the data; and(c) authenticate the digital signature based on the received data and the first entity's key.

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