购买者透明的非对称扩频指纹方案

An Asymmetric Spread-Spectrum Fingerprinting with Buyer Transparency

数字指纹的透明性是指在购买者不知道指纹存在的情况下实现数字指纹对多媒体的保护,它是电子交易的一项重要要求.依据所提出的安全二进制定点补码表示方法以及具有加法同态性质的密码系统,本文提出了一种基于扩频编码的非对称指纹方案,通过分析表明方案具有购买透明性、缺席审判、不可否认性和陷害性等特点.

Transparency of the fingerprinting is one of important requirements for electronic exchange to achieve the protection of multimedia content assuming the purchaser may not know the existence of fingerprinting. In terms of the security format for two＇s Complement fixed-point numbers and additive homomorphic cryptosystem,this paper proposes an asymmetric fingerprinting scheme based on spread-spectrum coding. The analysis shows that the scheme prorides many advantages,such as purchase transparency ,absent triM,no-repudiation and no-framing and so on.