RFID security protocol is widely discussed as an important issue, while most of the mutual authentication with the security agreement has been discussed most enthusiastically. The security of ultralightweight RFID authentication protocol has been discussed and has focused on low-cost RFID.In 2007, based on the SASI protocol proposed by Chien , a very small amount of calculation and communication costs can reach ultralightweight security protocol, which has been discussed by many paper. However all of the articles discussing the SASI protocol have not come up with effective improvement programsThis article cited in 2008, Xuefei Leng, Keith Mayes and Konstantinos Markantonakis has three methods proposed by scholars to be improved, so that was only one way to identify the HB family of agreements with the successful characteristics of mutual authentication.
