公开(公告)号：FR2729807B1

公开(公告)日：2001-01-26

申请号：FR9600584

申请日：1996-01-19

Applicant: KOREA TELECOMM AUTHORITY

Inventor： DONG HO WON ,  SUNG JUN PARK

IPC: G09C1/00 ,  H04L9/32 ,  H04L9/28 ,  H04L9/30 ,  G06F1/00 ,  G06F15/16 ,  G06F12/14

Abstract: 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'.