Abstract: Security RFID authentication scheme in supply chains should not only ensure the privacy and security of all the company,but also satisfy the requirement of supply chains management．Aiming at the problem that existing schemes can’t consider both sides at the same time,the paper proposed an authentication scheme based on “double signature”．The tag authentication message is signed by the access key and the authentication key．Only possessing both two keys can the company identify the tag．This scheme makes tags transfer safety inside the supply chains and makes the supply chains management convenient．Analysis shows that this scheme has clear advantage compared with existing schemes.

Key words: Supply chains management,Radio frequency identification,Double signature,Privacy protect