THRESHOLD DIGITAL-SIGNATURE METHOD CONTROLLED BY USER,申请号KR20040034251-传众专利搜索

THRESHOLD DIGITAL-SIGNATURE METHOD CONTROLLED BY USER

申请公布号：KR20040053816(A)

申请号：KR20040034251

申请日期：2004.05.14

申请公布日期：2004.06.24

申请人：

COMSTAR CO., LTD.

发明人：LEE, GYEONG HYEON;SHIN, SANG UK;SIM, GYEONG SEOP;YANG, JONG PIL

分类号：H04L9/14;(IPC1-7):H04L9/14

主分类号：H04L9/14

摘要：PURPOSE: A threshold digital-signature method controlled by a user is provided to prevent a counterfeit by using an existing digital-signature algorithm and a threshold digital-signature algorithm. CONSTITUTION: A user generates a virtual secret key by using a secret key corresponding to a public key, a random control parameter, and the secret key information. The user distributes the virtual secret key to a plurality of servers by using a secret distribution method. A message is transmitted to the servers. The servers forms virtual partial signature documents by using the message and the virtual secret key. A virtual digital-signature document is formed by using the virtual partial signature documents and an effective digital-signature document is obtained thereby. The generated digital-signature document is verified.