An RFID Group Tag Authentication Protocol Based on Hash Function

Abstract

The invention discloses a hash function-based RFID group tag authentication protocol, which includes the following steps: step 1, the reader sends an inquiry request message to the tags within its reading range; step 2, the reader sends the response of all tags The message is sent to the background database; step 3, the background database determines the group identifier and invalid identifier of the tag according to the tag response message sent by the reader, and selects one of the group identifiers; step 4, the background database checks the selected group All tags in the group are authenticated; step 5, the group tag authenticates the background database; step 6, the group tag and the background database update the group identifier. The invention adopts a one-way hash function to encrypt the message to be transmitted, and uses a random number to randomize the transmitted message, so as to realize the anonymity and untraceability of the label; meanwhile, by storing the old and new group identifiers in the background database This makes the present invention well resistant to desynchronization attacks. The present invention adopts a timeout retransmission mechanism to ensure that the response messages of all labels of the group are received, thereby ensuring the integrity of the group labels.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to the authentication problem of group tags in an RFID system. Background technique [0002] Radio Frequency Identification (RFID) is a non-contact automatic identification technology, which automatically identifies the target object through radio frequency wireless signals and obtains relevant data. A general RFID system consists of electronic tags, readers and background databases. The electronic tag is composed of a chip and an antenna, which is attached to the object to identify the target object. Each tag has a unique electronic code and stores the relevant information of the identified object. The reader is a device that uses radio frequency technology to read and write electronic tag information. The background database stores the identity information and relevant data related to the tags and readers, and processes and processes the messages sent by the readers. The ...

AI Technical Summary

Problems solved by technology

At present, RFID security protocols mainly focus on the authentication of a single tag. Researchers have also proposed some group tag authentication protocols, but they all have defects such as privacy leakage, inability to resist desynchronization attacks, and lack of forward security.

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