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Risk management for public key management infrastructure using digital certificates

  • US 6,324,645 B1
  • Filed: 08/11/1998
  • Issued: 11/27/2001
  • Est. Priority Date: 08/11/1998
  • Status: Expired due to Term
First Claim
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1. In a system including a public key management infrastructure shared by at least two groups of users, wherein the public key management infrastructure includes a database of digital certificates issued to the users, a method for managing risk arising from a user'"'"'s use of the public key management infrastructure, the method comprising:

  • dividing the database into domains, each domain including digital certificates issued to users in one of the groups;

    receiving a digital certificate for a user, wherein the digital certificate is issued by a CA to the user, the digital certificate represents that the user is bound to a public key corresponding to a private key held by the user, the public key and the private key form a key pair for use in public-key cryptography, the digital certificate includes a domain identifier, and the digital certificate is digitally signed by the CA;

    establishing a validity of the digital certificate;

    establishing the user'"'"'s identity;

    reading the domain identifier from the user'"'"'s digital certificate; and

    permitting the user to access digital certificates included in the domain identified by the domain identifier.

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