An Efficient Single-Key Pirates Tracing Scheme Using Cover-Free Families

A cover-free family is a well-studied combinatorial structure that has many applications in computer science and cryptography. In this paper, we propose a new public key traitor tracing scheme based on cover-free families. The new traitor tracing scheme is similar to the BonehFranklin scheme except that in the Boneh-Franklin scheme, decryption keys are derived from Reed-Solomon codes while in our case they are derived from a cover-free family. This results in much simpler and faster tracing algorithms for single-key pirate decoders, compared to the tracing algorithms of Boneh-Franklin scheme that use Berlekamp-Welch algorithm. Our tracing algorithms never accuse innocent users and identify all traitors with overwhelming probability.

• Type: Conference
• Year: 2006
• Where: ACNS
• Authors: Dongvu Tonien, Reihaneh Safavi-Naini
• Keywords: ACNS 2006, Boneh-Franklin Scheme, Cryptology, Tracing Algorithms, Traitor Tracing Scheme