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System and method for Viterbi decoding on encrypted data

  • US 6,760,438 B1
  • Filed: 07/01/1999
  • Issued: 07/06/2004
  • Est. Priority Date: 07/01/1999
  • Status: Expired due to Term
First Claim
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1. A method to be employed during channel decoding, said method comprising:

  • obtaining a channel decoding trellis having states, stages, and paths between states of adjacent stages, each of said paths having an associated path state;

    encrypting each said path state with an encryption mask to result in an encrypted path state.

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