基于加同态公钥密码体制的匿名数字指纹方案  

An Anonymous Fingerprinting Scheme Based on Additively Homomorphic Public Key Cryptosystem

作　　者：孙中伟[1] 冯登国[1] 武传坤[1] 

机构地区：[1]信息安全国家重点实验室(中国科学院软件研究所),北京100080

出　　处：《软件学报》2005年第10期1816-1821,共6页Journal of Software

基　　金：国家自然科学基金;国家重点基础研究发展规划(973)~~

摘　　要：提出了一种基于加同态公钥密码算法的匿名数字指纹方案,并给出了具有匿名功能的公钥和私钥对的具体构造方法,从而使该匿名指纹方案在发现盗版的情况下,销售商不需要第三方的帮助就能鉴别出数字多媒体作品的非法分发者,解决版权纠纷时也不需要购买者参与并提供相关的秘密信息,从而达到实现两方审判的目的.分析结果表明,该方案具有用户匿名及不可关联、销售商的可保证安全性和用户的可保证安全性等特点.This paper proposes an anonymous fingerprinting scheme based on the additively homomorphic public key cryptosystems. The proposed fingerprinting scheme enables the merchant to identify the illegal distributors without the help of a trusted third party when he/she finds an illegally redistributed fingerprinted copy. Furthermore, it allows two-party trials, i.e. there is no need for the accused （and possibly innocent） buyer to take part in the dispute resolution protocol and reveal his/her secrets. In addition, the problem of how to construct the anonymous public key and private key pairs is also addressed in the scheme. The security analysis shows that the proposed scheme is secure for both seller and buyer, and has the properties of anonymity and unlinkability for the buyer.

关 键 词：版权保护 同态公钥密码体制 匿名指纹 两方审判 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]