A new traitor tracing scheme
Xuejun Zhang · Journal of Northwest Normal University · 2006
A special equation is constructed based on LIFP(large integer factoring problem) and a parameter is introduced to transfer service private-key.The session key can be obtained using the special equation a_(i1)+a_(i2)=h mod φ(N) and the service private-key in decryption.On the basis of the above,a multi-service oriented traitor tracing scheme on LIFP is proposed.It has many advantages such as multi-service,black-box traitor tracing,ciphertexts of constant size,adding or revoking users,forward and backward security.Its whole capabilities are also better than the existing ones.