Asymmetric Cryptography Based Unidirectional Authentication Method for RFID

A novel unidirectional authentication method is proposed to solve the problems of access security and to protect the privacy of the tag in RFID ecosystems on basis of asymmetric cryptography. It provides better security with shorter length of secret key and lower computational cost in contrast to other methods of asymmetric cryptographies. This method implements one-way authentication from the reader-writer to the tag, and allows the tag to update its private key to improve the security of RFID authentication. This method also allows the tag to update its own name, which can keep the attackers from tracking the tag so as to solve the privacy protection of the tags.