Patents Assigned to CompFax Corporation
  • Method and apparatus for continuously acknowledged link encrypting
    Patent number: 4805216
    Abstract: The method and apparatus of the invention described herein provide confidential communications between two or more stations whereby the exchanged messages themselves provide the necessary enciphering keys for the messages to be encrypted and transmitted from each respective station. A full duplex communications loop is utilized between stations and the messages are exchanged substantially simultaneously.
    Type: Grant
    Filed: January 8, 1987
    Date of Patent: February 14, 1989
    Assignee: CompFax Corporation
    Inventor: Elliot L. Gruenberg