Abstract: A new traitor tracing scheme is proposed by using the Weil pairing in elliptic curves. The proposed scheme shows that the Weil pairing enables us to add a global escrow capability to the traitor tracing system. A single escrow key enables the decryption of ciphertexts encrypted under any public key，which is essential for the system manager to manage the global situation. The authorities can also supervise the entire market and forbid the spread of bad information with the global escrow capability. In addition, with the same security, this scheme, whose operations are on elliptic curves, is more efficient than the previous schemes based on the discrete-log problem over the group (1,3)G(1,3).

Key words: traitor tracing, broadcast encryption, electronic copyright protection