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RFID systems are some typical resource constraint systems and lightweight authentication is considered as one effective method to ensure their security and privacy. The EPCglobal Class-1 Gen-2 tags are popular RFID tags and this kind of tags has some on-chip computing resources. Based on these on-chip resources, a lightweight authentication protocol is proposed. The protocol ensures the integrity and freshness of the sessions among RFID systems by means of CRC() and pseudorandom number generator. The protocol uses concatenation operation to overcome the linear drawbacks of CRC() and exclusive OR operator. It provides forward security and it can resist against eavesdropping, tracing, replay and de-synchronization attack. It completes the strong authentication to tag by twice authentication. This protocol only uses the computing resources embedded in tags and it is very suitable to low-cost RFID systems.

A Strong RFID Authentication Protocol with Confidentiality and Anonymity for EPCglobal Class-1 Gen-2 Tags