Lightweight RFID Ownership Transfer Protocol Based on Blockchain

Abstract

With regard to current RFID tags, as their owners change during the circulation process, the ownership of the tags is transferred, and the data containing the tag information is also transferred. Data is stored in the blockchain, which is a distributed ledger system maintained by a decentralized collective. A complete ownership transfer requires a download, decryption, and encrypted upload of the label content information from the blockchain server. This mode will bring tedious and repetitive data processing problems when carrying out multiple consecutive ownership transfers. Seriously affect the efficiency of the entire process, and will bring safety issues. For this reason, this paper proposes a lightweight RFID ownership transfer protocol that uses a proxy re-encryption algorithm to process tag content information. That is, the blockchain server uses proxy re-encryption to perform ciphertext conversion of the encrypted information, so that the ciphertext encrypted by the user Alice's public key is converted into the ciphertext encrypted with the user Bob's public key, and the user Bob can directly decrypt it with his private key. This paper uses a lightweight hash function calculation to ensure the security of ownership transfer. The experimental security analysis of the protocol show that the proposed protocol meets the security requirements and improves the efficiency of ownership transfer.