| 摘要 |
PROBLEM TO BE SOLVED: To provide an improved lightweight PKI which solves a cancel problem and is more efficient and has more expendability than a conventional technique PKI. SOLUTION: This public key infrastructure(PKI) includes a subject, a verifier and an authentication station. The authentication station issues a 1st certification with no signature connecting the public key of the subject to long-term identification information about the subject to the subject and holds a certificate database of certificates with no signature. A 1st certificate with no signature is stored in the certificate database. The verifier holds a hash table storing the code hash of a valid certificate with no signature corresponding to the certificate with no signature stored in the certificate database. The hash table includes a 1st certificate with no signature. The subject presents the issued 1st certificate with no signature on the verifier for authentication and certifies that it has the knowledge of a private key corresponding to the public key in the certificate with no signature. |
