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System and method for verifying digital signatures on certificates

  • US 20060095388A1
  • Filed: 10/29/2004
  • Published: 05/04/2006
  • Est. Priority Date: 10/29/2004
  • Status: Active Grant
First Claim
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1. A method of verifying a digital signature on a certificate on a computing device, the method comprising the steps of:

  • a) performing a first signature verification operation on the digital signature using a first public key associated with an issuer of the certificate;

    b) determining if the digital signature is successfully verified in the first signature verification operation;

    c) storing the first public key in a memory store;

    d) 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;

    e) comparing the second public key with the first public key stored in the memory store to determine if the first and second public keys match; and

    f) indicating successful verification of the digital signature in response to the request if the digital signature was successfully verified in the first signature verification operation and if a match is determined at the comparing step, whereby the second signature verification operation need not be performed.

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