关键词: 椭圆曲线密码, Ad Hoc, 身份认证, 数字签名

Abstract: Through threshold mechanism，an identity authentication scheme for Ad Hoc network is proposed based on elliptic curve cryptography.In this scheme，the author can generate verifiable certificate by using elliptic curve digital signature without a trusted party，and the scheme can resist interior and exterior attackers effectively.Analyse show that the security of this scheme is based on the difficulty of solving the elliptic curve cryptography discrete logarithm problem，and its implementation is efficient.

Key words: elliptic curve cryptography, Ad Hoc, identity authentication, digital signature