Traitor Tracing for Stateful Pirate Decoders with Constant Ciphertext Rate.
Duong Hieu Phan.
Abstract: Stateful pirate decoders are history recording and abrupt pirate decoders. These decoders can keep states between decryptions to detect whether they are being traced and are then able to take some counter-actions against the tracing process, such as ``shutting down'' or erasing all internal information. We propose the first constant ciphertext rate scheme which copes with such pirate decoders. Our scheme moreover supports black-box public traceability.
Ref: Proceeding of Vietcrypt '06, Lecture Notes in Computer Science Vol. 4341, pages 354-365, Springer-Verlag, 2007.