A Study on the Encryption Algorithm for RFID Tag (SEED : 8 Rounds × 64 bits block)

Although it is always weak between RFID tag and terminal in focus of the security, there are no security skills in RFID tag. Recently there are a lot of studying in order to protect it, but because it has some physical limitation of RFID, that is it should be low electric power and high speed, it is impossible to protect with the skills. At present, the methods of RFID security are using a security server, a security policy and security. One of them the most famous skill is the security module, then they has an authentication skill and an encryption skill. In this paper, we designed and implemented after modification original SEED into 8 round and 64 bits for tag.