公开(公告)号：JPH08328471A

公开(公告)日：1996-12-13

申请号：JP12384496

申请日：1996-05-17

Applicant: KOREA TELECOMMUNICATION

Inventor： AN GUMU HIYOKU ,  I EN HO ,  BAKU IRU HOAN ,  JIYAN CHIYON YON

IPC: H04L9/30 ,  G06F9/06 ,  G09C1/00 ,  H04L9/32

Abstract: PROBLEM TO BE SOLVED: To provide a reliable information service and an efficient authentication in restorative electronic signature method, additive electronic signature method, and authentication exchange method. SOLUTION: A signer A calculates excesses x, y1 , y2 to generate an electronic signature (x, y1 , y2 ). A verifier B inputs (x) and an identification number ID to a hash function to generate h(x, IDA). A massage is restored by calculation according to a prescribed equation, and these contents are confirmed to verify the justice of the electronic signature (x, y1 , y2 ) of the signer A.