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System and method for adaptive cryptographically synchronized authentication

  • US 6,976,168 B1
  • Filed: 07/21/2000
  • Issued: 12/13/2005
  • Est. Priority Date: 07/23/1999
  • Status: Expired due to Term
First Claim
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1. A system for authenticating message data to be exchanged between a sender and a receiver, comprising:

  • a controller that dynamically selects one of a plurality of authentication mechanisms to be used in providing authentication for an exchange of message data; and

    an authentication module that generates an authentication tag using said selected authentication mechanism, said authentication tag being appended to said message data;

    wherein a portion of a message associated with the message data is processed using a first function that is utilized at least in part to produce the authentication tag;

    wherein said portion of said message processed is selected by using a pseudorandom probabilistic function;

    wherein said message is partitioned into regions, each region including a number of message parts, and providing one message part from each region as input to said first function.

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