NON-INTERACTIVE ELECTRONIC SIGN METHOD BASED ON PERSONAL IDENTIFICATION INFORMATION HAVING SELF-CERTIFICATION CHARACTERISTIC

摘要

PROBLEM TO BE SOLVED: To provide a non-interactive electronic sign method based on personal identification information having self-certification characteristic, which has an advantage of a sign method based on a certifier and an advantage based on the personal identification information. ;SOLUTION: A system of a center is initialized, a result value based on a secret key and personal identification information are transmitted to the center, and after the verification information computed in the center is transmitted to a user, the user A selects a random number (r) to compute sign information (z) on a sign midium value (v), a hash function result value (e)=h(v, m) and a non-enciphered information in steps 24-26. In the step 27, the user A transmits a hash function (z, i, x, e) to a user B. In the steps 28-29, the user B calculates a hash function e'=h(v', m) to verify e=e'.;COPYRIGHT: (C)1996,JPO