Patent ID: 7412053
Filing Date: 2008-08-12
Classification: H04L

Abstract:
1. A method for performing a self test of a cryptographic device, wherein a first key set and test data are stored in the device, the test data include authentication test data indicative of at least one result of at least one predetermined operation on a test key set, the authentication test data consist of fewer bits than the test key set, and the device is operable in a normal mode to perform at least one of encryption and decryption on input data using the first key set, said method including the steps of: (a) upon initiation of the self test, selecting the test data rather than the first key set; (b) performing an abbreviated authentication procedure using the authentication test data, wherein the abbreviated authentication procedure is an abbreviated version of a full authentication procedure that can be performed on the test key set, and the abbreviated authentication procedure on the authentication test data produces a result identical to a result of the full authentication procedure on the test key set; and (c) comparing at least one result of the authentication procedure to at least one expected result determined by the test data, and setting a flag indicative of the result of the comparison.