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Method and system for selecting encryption keys from a plurality of encryption keys

  • US 7,254,232 B2
  • Filed: 02/14/2001
  • Issued: 08/07/2007
  • Est. Priority Date: 02/14/2001
  • Status: Expired due to Fees
First Claim
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1. A method to encrypt a data message having a plurality of message data blocks prior to transmitting said message data blocks over a network, said method comprising:

  • extracting data values from at least two of said message data blocks;

    selecting encryption keys from among a plurality of encryption keys dependently upon said extracted data values, respectively; and

    ,encrypting subsequent ones of said message data blocks using said selected encryption keys, respectively.

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