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Authentication of a host processor requesting service in a data processing network

  • US 6,493,825 B1
  • Filed: 06/29/1998
  • Issued: 12/10/2002
  • Est. Priority Date: 06/29/1998
  • Status: Expired due to Term
First Claim
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1. In a data processing network, a method of operating a data processing device to authenticate a host processor requesting service, said method comprising:

  • a) the data processing device receiving a request for service from the host processor, and the data processing device responding by returning a first random number to the host processor, and encrypting the first random number using an encryption scheme preassigned to the host processor to produce an encrypted value; and

    b) the data processing device receiving encrypted data from the host processor, and authenticating the host processor when the encrypted data from the host processor matches the encrypted value;

    wherein the data processing device further responds to the request for service by sending additional random numbers to the host processor, storing the additional random numbers in a list in memory, and encrypting the additional random numbers in the list as a background process relative to receipt of the encrypted data from the host processor to produce a sequence of encrypted values.

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