A simplified approach to user controllable threshold signatures

Author

Yang, Jong-Phil ; Shin, Sang Uk ; Rhee, Kyung-Hyune

Author_Institution

Dept. of Comput. Sci., Pukyong Nat. Univ., Pusan, South Korea

fYear

2004

fDate

6-9 July 2004

Firstpage

273

Lastpage

280

Abstract

A threshold signature scheme typically assumes that the shared signing function can only be activated by a quorum number of servers. Therefore, it is inappropriate for settings where an organization employs some servers for a threshold protection of its private signing function. That is, if anyone has the power to activate the signing function of servers, they can easily compute valid signatures for a specific organization without knowing the secret private key. In this paper, we present a model of the threshold signature scheme in which the user possesses the controllability to activate his private signing functions and the secret private key is shared among several servers. Moreover, our scheme is applicable to both discrete-log based threshold signatures and RSA based threshold signatures.

Keywords

cryptography; digital signatures; electronic commerce; RSA; discrete-log; private signing function; secret private key; servers; shared signing function; threshold protection; user controllable threshold signature scheme; Computer science; Contracts; Controllability; Cryptography; Electronic commerce; Fault tolerant systems; Protection; Security; Telecommunication computing; Telecommunication control;

fLanguage

English

Publisher

ieee

Conference_Titel

e-Commerce Technology, 2004. CEC 2004. Proceedings. IEEE International Conference on

Print_ISBN

0-7695-2098-7

Type

conf

DOI

10.1109/ICECT.2004.1319743

Filename

1319743