计算机工程

• 安全技术 • 上一篇    下一篇

基于CFF 码和I 码的抗合谋数字指纹编码

李启南1,董一君1,李 娇2,欧阳志凡1   

  1. (1. 兰州交通大学电子与信息工程学院,兰州730070; 2. 北京交通大学计算机与信息技术学院,北京100044)
  • 收稿日期:2014-08-20 出版日期:2015-06-15 发布日期:2015-06-15
  • 作者简介:李启南(1965 - ),男,副教授、硕士,主研方向:信息安全;董一君,硕士研究生;李 娇、欧阳志凡,学士。
  • 基金项目:

    教育部人文社会科学研究规划基金资助项目(13YJA870013);2014 年度甘肃省档案科技基金资助项目(2014-04)。

Anti-collusion Digital Fingerprint Coding Based on CFF Code and I Code

LI Qinan  1,DONG Yijun  1,LI Jiao  2,OUYANG Zhifan  1   

  1. (1. School of Electrical & Information Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China; 2. School of Computer and Information Technology,Beijing Jiaotong University,Beijing 100044,China)
  • Received:2014-08-20 Online:2015-06-15 Published:2015-06-15

摘要:

随着抗合谋参数值增大,CFF 码的编码效率呈下降趋势。为解决该难题,提出一种新的抗合谋数字指纹编码方案,并设计相应的编码生成算法和检测算法。生成算法以小参数构建的CFF 码为内码、I 码为外码生成级联编码,编码效率等同于嵌入CFF 码的编码效率,降低了编码难度。检测算法在确定编码所在的CFF 子块位置后,对指纹特征码字位置进行跟踪从而发现叛逆者。在基于非对称数字指纹的音频盗版追踪系统上进行测试,结果表明,该方案保持了CFF 码抗多种类型合谋攻击的特性,叛逆者追踪成功率超过80% ,且未发生误判现象,能为依法制裁叛逆者提供法律证据。

关键词: 数字版权保护, 区组设计, 抗合谋数字指纹, CFF 码, 叛逆者追踪

Abstract:

As anti-collusion parameter values increase,Cover Free Family(CFF)code coding efficiency is on the decline. In order to solve the difficult problem,this paper presents a new anti-collusion digital fingerprint coding scheme,designs the code generation algorithm and detection algorithm. The former encodes the new code with the small parameter CFF code for internal code and I code for outer code,of which coding efficiency is equivalent for embedding the CFF code coding efficiency and effectively. The latter first explores the location which the inspected code is in the CFF internal code block,then tracks fingerprint characteristic codeword position to identify traitor. Test results on the asymmetric digital fingerprint audio piracy tracking system show that the new code can keep the characteristic that the CFF code resistances a variety of collusion attack, the success rate of traitor tracing is above 80% ,no misjudgment phenomenon happen and can provide non-repudiation legal evidence in which traitor is sentenced by the law.

Key words: digital copyright protection, block design, anti-collusion digital fingerprint, Cover Free Family(CFF)code, traitor tracing

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