一种基于纠错码的叛逆者追踪模型

当一些共谋者试图构造一个盗版的解码器以获取对数据内容非法访问的时候,叛逆者追踪模型可以用来发现至少其中的一个叛逆者。Chor和Fiat提出了一种将数据划分为若干块并且每一块用一些不同密钥加密的叛逆者追踪模型。文中研究相同的问题,给出了一种基于纠错码并可防止最多k个用户共谋的追踪模型。基于纠错码的叛逆者追踪模型是通过纠错码来构造的。它是一种公开的、确定的并且有很好性能的模型,此模型只需将数据内容划分为8klogN块,每个数据块需要2k个密钥。

An ECC-Based Traitor Tracing Scheme

Traitor tracing schemes allow detection of at least one traitor when a group of colluders attempt to construct a pirate decoder and gain illegal access to content.Chor and Fiat proposed some schemes which divide the content into some sessions and each session key is encrypted under some keys.We consider the same scenario as Chor and Fiat and present an ECC-based traitor tracing scheme,that is good against coalitions of at most k corrupt users.ECC-based traitor tracing scheme is constructed with an error correcting code.It is open,deterministic and efficient which requires session length 8k logN and 2k keys each session.