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Method for ensuring secure communications

  • US 5,301,247 A
  • Filed: 07/23/1992
  • Issued: 04/05/1994
  • Est. Priority Date: 07/23/1992
  • Status: Expired due to Fees
First Claim
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1. A method for defining an encryption key that is used to encrypt and decrypt transmissions between two stations, comprising the steps of:

  • (a) randomly selecting a first part encryption key at one of the stations and a second part encryption key at the other station;

    (b) encrypting the first part encryption key at said one station;

    (c) transmitting the encrypted first part encryption key to the other station;

    (d) decrypting the first part encryption key at said other station;

    (e) encrypting the second part encryption key at said other station;

    (f) transmitting the encrypted second part encryption key to said one station;

    (g) decrypting the second part encryption key at said one station; and

    (h) combining the first part and the second part encryption keys at each station to determine the encryption key, which is then used to encrypt and decrypt further communications between the two stations.

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