计算机工程 ›› 2011, Vol. 37 ›› Issue (15): 95-97,105.doi: 10.3969/j.issn.1000-3428.2011.15.029

• 安全技术 • 上一篇    下一篇

基于椭圆曲线的可证明安全的签密方案

任艳丽1,陆海宁2   

  1. (1. 上海大学通信与信息工程学院,上海 200072;2. 上海交通大学信息安全工程学院,上海 200240)
  • 收稿日期:2011-04-15 出版日期:2011-08-05 发布日期:2011-08-05
  • 作者简介:任艳丽(1982-),女,博士后,主研方向:密码学,网络安全;陆海宁,博士研究生
  • 基金项目:
    中国博士后科学基金资助项目(20100470675);上海市科委基金资助重大项目(10DZ1500200);上海市博士后计划基金资助项目(10R21413200)

Provably Secure Signcryption Scheme Based on Elliptic Curve

REN Yan-li  1, LU Hai-ning  2   

  1. (1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China; 2. School of Information Security Engineering, Shanghai Jiaotong University, Shanghai 200240, China)
  • Received:2011-04-15 Online:2011-08-05 Published:2011-08-05

摘要: 签密方案可以同时实现保密和认证,且实现代价小于加密和签名之和,但大多数签密方案都没有严格的安全证明。为此,基于椭圆曲线群上的困难问题提出一个可证明安全的签密方案。方案仅需要一次双线性对运算,实现快速。在标准模型下,证明该方案既具有密文不可区分性与签名不可伪造性,也具有不可否认性、前向安全性和公开可验证性。

关键词: 可证明安全, 签密, 标准模型, 公开可验证性, 前向安全性

Abstract: A signcryption scheme can realize signature and encryption simultaneously, and its cost is smaller than the sum of signature and encryption. However, most signcryption schemes do not have strict security proof. This paper proposes a signcryption scheme based on difficult problems of elliptic curve group. The scheme is efficient and only needs one pair operation. It proves that the scheme is semantic secure and unforgeable in the standard model. Moreover, the scheme has non-repudiation, forward security and public verification.

Key words: provably secure, signcryption, standard model, public verification, forward security

中图分类号: