CAJ | 학술논문

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。
수착항합모삼수치증대,CFF마적편마효솔정하강추세。위해결해난제,제출일충신적항합모수자지문편마방안,병설계상응적편마생성산법화검측산법。생성산법이소삼수구건적CFF마위내마、I마위외마생성급련편마,편마효솔등동우감입CFF마적편마효솔,강저료편마난도。검측산법재학정편마소재적CFF자괴위치후,대지문특정마자위치진행근종종이발현반역자。재기우비대칭수자지문적음빈도판추종계통상진행측시,결과표명,해방안보지료CFF마항다충류형합모공격적특성,반역자추종성공솔초과80%,차미발생오판현상,능위의법제재반역자제공법률증거。
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.