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Method and system for securely exchanging encryption key determination information

  • US 8,200,974 B1
  • Filed: 07/22/2010
  • Issued: 06/12/2012
  • Est. Priority Date: 02/14/2001
  • Status: Active Grant
First Claim
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1. A method for securely exchanging information items used to generate encryption keys among at least two parties using a public/private encryption key system over a communication network, each of said parties retaining an initial private key and transmitting an initial corresponding information item used by each receiving party to determine, and retain, an initial encryption key, said method comprising the steps of:

  • configuring at least one processor to perform the functions of;

    a. determining a next private key and a next corresponding information item set, wherein said next private key is retained among said retained next private keys and said corresponding information item set includes a public key and a synchronization indicator, said synchronization indicator altering a starting position of an encryption sequence in said public key;

    b. encrypting at least one element of said next information item using an encryption key selected from said retained encryption keys;

    c. transmitting said encrypted next information item over said network;

    d. decrypting a received encrypted information item element using a private key selected from said retained private keys; and

    e. determining a next encryption key from said next private key and said received information item, wherein said next encryption key is retained among said retained encryption keys.

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