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Encryption protocol

  • US 7,249,256 B2
  • Filed: 07/11/2002
  • Issued: 07/24/2007
  • Est. Priority Date: 07/11/2001
  • Status: Active Grant
First Claim
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1. A method for transferring information data acquired by a digital pen to a recipient, the method comprising:

  • generating, in the digital pen, a random number to be associated with an information data transmission, whenever non-repudiation of said information data transmission is to be provided, before the information data of that transmission is acquired;

    signing, in the digital pen, said random number using a private key before said information data is acquired; and

    sending said information data and said signed random number to said recipient, when said information data is acquired.

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