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System and method for distributed group management

  • US 20010049787A1
  • Filed: 05/16/2001
  • Published: 12/06/2001
  • Est. Priority Date: 05/17/2000
  • Status: Active Grant
First Claim
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1. A system of distributed group management for indirectly authenticating membership of a user in a group in order to manage security for a client on the user side and a server for executing a remote processing request from the user side under a predetermined authorization assigned for every group, provided with a group certificate issuing apparatus for issuing a group certificate on the client side based on original group information including the name of the group to which the related user belongs when there is said remote processing request and a group certificate verification unit for verifying a legitimacy of said group certificate transmitted from the client side in said server, wherein said group certificate issuing apparatus adds an issuance side processed value obtained by processing the information of the original group information by a cryptographic function to the original group information and defines this as the group certificate and said group certificate verification unit processes part of the information included in the received group certificate by an identical cryptographic function to obtain a verification side processed value and performs said authentication by confirming that said issuance side processed value and said verification side processed value coincide.

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