Abstract: A group tag ownership transfer protocol without trusted third-party participation is proposed to address the inability of current protocols to achieve simultaneous multi-tag ownership transfer. This protocol enabled transferring ownership of a tag group between the same original and new owner pair, extending application scenarios. The R_LWE cryptosystem encrypted transmitted information, with encryption operations performed only on the tag side to reduce computational load, while decryption was handled by the owner side. Multi angle analysis shows the protocol maintains robust protection with lower computational requirements than existing solutions, making it suitable for low-cost radio frequency identification (RFID) systems.