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Security method and system for persistent storage and communications on computer network systems and computer network systems employing the same

  • US 6,088,799 A
  • Filed: 12/11/1997
  • Issued: 07/11/2000
  • Est. Priority Date: 12/11/1997
  • Status: Expired due to Fees
First Claim
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1. A login method to enhance security in a network computer system having at least one server computer coupled over a communication network to a plurality of client computers, wherein each client computer is coupled to directly access a persistent storage device and wherein each client computer is operated by a control program after login, the method comprising the steps of:

  • receiving a login ID and password from a user at a first one of said client computers;

    encrypting the login ID and password with a first asymmetric key stored in the persistent storage coupled to the first client computer;

    transmitting a login request including the encrypted login ID and password to a first one of said server computers;

    decrypting the encrypted portions of the login request with a second asymmetric key at the server computer;

    authenticating the first client computer to the first server computer, using the login ID and password from the decrypted login request;

    transmitting, upon authentication of the first client computer, a set of symmetric keys from the first server computer to the first client computer, including;

    one symmetric key for encrypting and decrypting persistent information associated with the control program for operating the first client computer;

    another symmetric key for encrypting and decrypting persistent information associated with the login ID; and

    yet another symmetric key for encrypting and decrypting communications between the first client computer and the first server computer.

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