Patent ID: 7716139

Claim:
A method of verifying a digital signature on a certificate on a computing device, the method comprising: a processor of the computing device performing a first signature verification operation on the digital signature using a first public key associated with an issuer of the certificate; said processor successfully verifying the digital signature in the first signature verification operation; said processor storing the first public key in a memory store after successfully verifying the digital signature in the first signature verification operation; said processor receiving a request to perform a second signature verification operation on the digital signature using a second public key associated with an issuer of the certificate; said processor comparing the second public key with the first public key stored in the memory store; said processor determining that the first and second public keys match based on said comparing; and said processor indicating, as a response to the request to perform the second signature verification operation, successful verification of the digital signature in lieu of performing the second signature verification operation.