RFID group label authentication protocol based on Hash function

Abstract

The invention discloses an RFID group label authentication protocol based on a Hash function. The RFID group label authentication protocol comprises the following steps: step 1, a reader sends an inquiry request message to a label in a reading range of the reader; step 2, the reader sends the response messages of all the tags to a background database; step 3, the background database determines a group identifier and an invalid identifier of the label according to the label response message sent by the reader, and selects one group identifier; 4, the background database authenticates all the labels in the selected group; 5, the group label authenticates the background database; and step 6, the group identifier is updated by the group label and the background database. A one-way hash function is adopted to encrypt a message needing to be transmitted, and a random number is used to randomize the transmitted message, so that anonymity and non-traceability of the label are realized; and meanwhile, the new and old group identifiers are stored in the background database, so that the method can well resist the desynchronization attack. A timeout retransmission mechanism is adopted to ensure that the response messages of all the tags in the group are received, and the integrity of the tags in the group is ensured.

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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