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Secret key generating method, common key generating method, encryption method, cryptographic communication method and cryptographic communication system

  • US 20010036275A1
  • Filed: 01/23/2001
  • Published: 11/01/2001
  • Est. Priority Date: 01/25/2000
  • Status: Active Grant
First Claim
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1. A secret key generating method for generating a secret key of an entity in each of a plurality of key generating agencies, comprising the steps of:

  • obtaining each divided identification information by dividing identification information of the entity into a plurality of blocks;

    extracting a part of the components of a symmetric matrix of a secret for each key generating agency in accordance with each divided identification information; and

    generating a secret key of the entity by synthesizing the extracted components with a random number particular to the entity.

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