×

Apparatus and method for secure transmission of data over an unsecure transmission channel

  • US 4,881,263 A
  • Filed: 09/25/1987
  • Issued: 11/14/1989
  • Est. Priority Date: 09/25/1987
  • Status: Expired due to Term
First Claim
Patent Images

1. A method for transmitting data packets in a secure manner on an unsecured data transmission channel having a plurality of nodes coupled thereto, each of said nodes including a memory for storing encryption key words for use in encrypting said data packets, said method comprising the steps of:

  • generating at one of said nodes a data packet for transmission to a target one of said nodes;

    searching the memory at said host node to locate an encryption key word designated for use with data packets to be processed by said target node;

    assembling, upon determining that no said encryption key word is stored, a key request (AR) data packet; and

    transmitting said AR data packet to a key distribution (KDC) one of said nodes to request assignment of an encryption key word for use in encrypting data packets to be processed by said host and target nodes.

View all claims
  • 6 Assignments
Timeline View
Assignment View
    ×
    ×