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Strongly separable codes

机译:高度可分离的代码

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摘要

Binary t-frameproof codes (t-FPCs) are used in multimedia fingerprinting schemes where the identification of authorized users taking part in the averaging collusion attack is required. In this paper, a binary strongly (t) over bar -separable code ((t) over bar SSC) is introduced to improve such a scheme based on a binary t-FPC. A binary (t) over bar SSC has the same traceability as a binary t-FPC but has more codewords than a binary t-FPC. A composition construction for binary (t) over bar SSCs from q-ary (t) over bar SSCs is described, which stimulates the research on q-ary (t) over bar SSCs with short length. Several infinite series of optimal q-ary (2) over bar -SSCs of length 2 are derived from the fact that a q-ary (2) over bar -SSC of length 2 is equivalent to a q-ary (2) over bar -separable code of length 2. Combinatorial properties of q-ary (2) over bar -SSCs of length 3 are investigated, and a construction for q-ary (2) over bar -SSCs of length 3 is provided. These (2) over bar -SSCs of length 3 have more than 12.5% codewords than 2-FPCs of length 3 could have.
机译:二进制t-frameproof代码(t-FPC)用于多媒体指纹识别方案,其中需要识别参与平均合谋攻击的授权用户。在本文中,引入了一种在条码可分离代码上的二进制强(t)(在条码SSC之上)(t),以改进基于二进制t-FPC的这种方案。 bar SSC上的二进制(t)具有与二进制t-FPC相同的可追溯性,但是比二进制t-FPC具有更多的代码字。描述了在bar SSC上由qary(t)组成的bar SSCs上的二进制(t)的成分构造,这激发了对长度较短的bar SSC上qary(t)的研究。长度为2的bar -SSC上的数个无限q-ary(2)的无穷级数是基于以下事实得出的:长度为2的bar -SSC上的q-ary(2)等于bar上的qary(2)长度为2的可分离代码。研究了长度为3的条形-SSC上q元(2)的组合性质,并提供了长度为3的条形-SSC上q元(2)的构造。与长度为3的2-FPC相比,长度为3的这些(2)over bar -SSC具有超过12.5%的码字。

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