Based On Elliptic Curve Traceable Threshold Digital Signature Scheme

With the rapid development of information technology, network is applied in more and more fields and information security become more important. In recent years, security of information has become a hot research area in information technology. The studying of digital signature is an important subject in information security, and it is significant for guarantee the integrality and authentication of information.The (t,n) threshold signature was developed from normal digital signature. A threshold signature system can scatter rights and avoid the abuse of privilege.The security of elliptic curve cryptographic (ECC) system is based on the elliptic curve discrete logarithm problem (ECDLP). Currently, the best algorithm known to solve the ECDLP has fully exponential running time. In order to attain a same security level, elliptic curve cryptography system can use shorter key than other cryptography systems. So, elliptic curve cryptography has more little keys, uses fewer resources and can be more easily implemented.This paper containts the research and implement of traceable digital signature schemes based on elliptic curve cryptogryaph. The paper put the theory into practice, by using the developing tools such as JAVA, JBuilder and SQL Server Database to construct a threshold signature system, which can be used to signe on electronic files. The following work has been completed in this paper: By studying the current threshold signature schemes, it analyses and improves a kind of threshold group signature scheme; Basing on researching ECC, it has implemented generating a safe elliptic curve randomly and choicing base-point; In this paper, it designs a traceable threshold signature scheme based on elliptic curve cryptography; A traceable threshold signature based on ECC system has implemented. This system can be applied to singe on file with off-line.