TTP-free weighted muti-owner RFID tag authentication protocol

Aiming at the problem of multi-owner tag authentication,a TTP-free weighted multi-owner RFID tag authentication protocol is proposed.In this protocol the Shamir secret sharing threshold scheme is used to manage the key,with the message encrypted with the key stream that is generated based on the hash function.It realizes the mutual authentication between all of the readers and the tag.In the proposed protocol,no TTP is involved,and the key update and de-synchronization attack are realized.Compared with similar protocols,this protocol is more concise and effective.The formal analysis of the BAN logic proves that the protocol satisfies the mutual authentication.The analysis of security characteristics shows that the proposed protocol satisfies anti-replay attack,anti-de-synchronization attack,forward security,untraceabitility,confidentiality and denial of service attack,etc.