An Efficient Public Key Traitor Tracing Scheme

摘要: We construct a public key encryption scheme in which there is one key, but many private decryption keys. If some digital content (e.g., music clip) encrypted using the and distributed through broadcast channel, then each legitimate user can decrypt its own key. Furthermore, if coalition of users collude to create new an effcient algorithm trace creators. Hence, our system provides simple solution "traitor tracing problem". Our deterministic, catches all active traitors while never accusing innocent users, although it only partially "black box". A minor modification enables resist adaptive chosen ciphertext attack. techniques apply error correcting codes discrete log representation problem.