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Method and system for securely timestamping digital data

  • US 20030028778A1
  • Filed: 08/02/2001
  • Published: 02/06/2003
  • Est. Priority Date: 08/02/2001
  • Status: Active Grant
First Claim
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1. A method for securing timestamping of digital data comprising the steps of:

  • providing a secure encryption key; and

    , providing a processor for performing security functions with the secure encryption key, the processor operable in a first mode wherein the secure encryption key is used for encryption operations and for test operations and in a second mode in which the secure encryption key is only used for timestamping operations, wherein once the processor performs a function with the secure encryption key in the second mode, it is precluded from performing further functions in the first mode with the same secure encryption key.

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