A Traitor Tracing Scheme Based on the RSA Scheme

Traitor tracing schemes constitute a very useful tool against piracy in the context of digital content broadcast. In such multi-recipient encryption schemes, the data-suppliers can reveal the identities of the subscribers that were implicated in the construction of a pirate-device that illegally receives the digital content. In this paper, a traitor tracing scheme based on the RSA scheme is proposed. The scheme does not rely on any trusted third party, and is K - collusion resistant, can provides black-box confirmability, and revoke any traitor´s personal decryption key (without the limitation to threshold) without updating the personal decryption key of the remaining subscribers. And the scheme is more efficient than the ElGamal-like scheme according to complexity overload. Its security is the same as that the RSA scheme.