RFID Mutual Authentication Protocols Using Key Exchange Based on Hash Functions

A RFID system is a key technology used to create a ubiquitous society through non-contact radio identification technology, expected to provide us with information far above time and space. However, several security issues including a matter of privacy have been raised on account of restricted features of RFID communication environment. A variety of studies have been underway to bring solutions to them, but existing studies require excessive processing capabilities for security problems, tags and back-end database. To solve out this problem, this paper suggests mutual authentication RFID protocols that can guarantee safety from spoofing and re-transfer attack and also reduce the number of comparative operations in the back-end database, with the use of hash functions. XOR operation and key exchange.