Abstract: A traitor tracing scheme based on the single cycle T-function is proposed.In this scheme，the tracer can trace at least one user who makes the pirate（called traitor） with black-box method when the pirate is found.The main character of this scheme is that the number of tracing is linear and the tracing algorithm is also efficient.In addition，there is no restriction on the number of colluders.

摘要： 提出了一个基于单圈T-函数的叛逆追踪方案。在方案中，当发现盗版的解密盒时，能够以黑盒子的追踪方式至少追踪到一个制造盗版的用户（即叛徒）。该方案的特点是：追踪次数是线性的，追踪效率很高。此外，追踪算法的实现不受共谋用户个数的限制。