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System and method for fast nested message authentication codes and error correction codes

  • US 6,845,449 B1
  • Filed: 07/21/2000
  • Issued: 01/18/2005
  • Est. Priority Date: 07/23/1999
  • Status: Expired due to Fees
First Claim
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1. A method for detecting errors in a message comprising:

  • receiving at least one message data word and an authentication tag, said authentication tag produced from said at least one message data word according to a nested message authentication code having a reversible inner function;

    processing said received at least one message data word according to said nested message authentication code to produce an authentication tag;

    determining whether said produced authentication tag is the same as said received authentication tag;

    wherein said receiving comprises receiving at least one message data word, an authentication tag, and an intermediate result from said reversible inner function.

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