Patent ID: 6493825
Filing Date: 2002-12-10
Classification: G06F

Abstract:
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.