Provably Secure Aggregate Signature And Application

In order to ensure the integrity of the information in the transmission process,the identity of the sender and preventting the occurrence of the transaction in the credit,the sender of the data uses the private key to sign the digest information through the signature technique.The sender sent the signature and summary information to the receiver,The receiver can only use the sender's public key to verify the signature information.The emergence of aggregate signature can solve the efficiency problem of multi-signature of multi-user.n users sign the n different messages m_i(i=1,2,…n)and obtain ?_i(i=1,2,…n),aggregators compress n signatures into a signature ?.The verifier only needs to verify ?,can achieve the authentication of all ?_i(i=1,2,…n).This paper mainly studies identity-based and certificateless aggregate signature scheme.Based on the studies of forefathers,by the studies of identity-based aggregate signature scheme.Pointing out the loopholes that based on the identity of the former n1-real signers,the attacker can forgery an effective aggregation signature in the program by calculating.An improved scheme is proposed for resisting the loophole.Based on computational Diffie-Hellman problem,the scheme is proved unforgeable in random oracle model.Based on the studies of forefathers,by the studies of certificateless aggregate signature scheme,this paper puts forward an attack model.The attacker has the system master key,it is possible to forge a valid signature for any message with two valid signatures.Based on the loophole,a new secure scheme is proposed to resist the loophole.The scheme can resist the attack of two kinds of certificateless attackers in the random oracle model by analysis.Once the information of high-speed railway is tampered in the process of network transmission,which leads to the consequences are extremely serious.It's particularly important to ensure the detected information of the high-speed rail signal that is complete and accurate in the process of network transmission.Based on the characteristics of the certificateless aggregate signature and the design pattern of the high-speed railway signal system,a model for data transmission authentication in high-speed railway signal system is proposed.By this model,we can guarantee the data is integrity and accuracy through the transmission process in the high-speed rail signal system,the certainty of identity about various trains.