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Method and apparatus for providing field confidentiality in digital certificates

  • US 6,802,002 B1
  • Filed: 01/14/2000
  • Issued: 10/05/2004
  • Est. Priority Date: 01/14/2000
  • Status: Expired due to Term
First Claim
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1. A method of providing confidentiality of authorization information in a digital certificate shared by multiple recipients, the method comprising the steps of:

  • providing cryptographic folders in the digital certificate, wherein at least one first type cryptographic folder contains at least one first type field of authorization information relevant to a first recipient and at least one second type cryptographic folder contains at least one second type field of authorization information relevant to a second recipient;

    issuing the digital certificate at a certificate authority by signing the digital certificate and sending the signed digital certificate to a subject, wherein the issued digital certificate is in an unprotected form wherein the at least one first type and the at least one second type fields of authorization information are readable;

    converting the digital certificate from the unprotected form to a protected form wherein the at least one first type field of authorization information is readable and the at least one second type field of authorization information is not readable;

    delivering the converted signed digital certificate to the first recipient; and

    verifying the authenticity of the signed digital certificate by the first recipient.

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