关键词: EIGamal加密算法, 叛逆者追踪, 可撤销性, 可恢复性, 匿名

Abstract:

Based on the cryptosystem of EIGamal， an anonymous traitor tracing scheme is presented in this paper. In the scheme， information use symmetric encryption and is broadcasted to legitimate users， and the session key is sent to users through the header produced by datasupplier after register users has been tested and verified. The analysis of performance show that the scheme not only has many advantages， such as anonymous safety of users， nonrepudiation， full frameproof， revocability， recoverability， but also is able to achieve antilinearattack.

Key words: EIGamal encryption algorithm, traitor tracing, revocability, recoverability, anonymous