A lightweight rfid two-way authentication method based on puf

Abstract

A PUF-based lightweight RFID two-way authentication method belongs to the technical field of RFID, and specifically includes: a pseudo-random number seed generation stage, an initialization stage and a two-way authentication stage. The randomization of each round of interactive messages is realized by the built-in physical unclonable function PUF on the RFID tag side, and a new bit flip operation FLIP is designed to reduce the calculation cost of the tag side; each round of authentication is realized by sharing the seed of the pseudo-random number generator In the process, the shared key between the server and the tag side avoids using the previous round of key values ​​to update the new key in the next round; the time threshold and the pseudo-random number generator count threshold are used respectively to solve the seed generation process and key Asynchronous attacks in the sharing process; the lightweight two-way authentication of RFID tags based on PUF is realized, which meets the demand of limited resources of low-cost RFID tags, and enhances the security and privacy in the process of two-way authentication.

Description

technical field [0001] The invention relates to the technical field of RFID, in particular to a PUF-based lightweight RFID two-way authentication method. Background technique [0002] Radio Frequency Identification (RFID) is a radio-based information identification technology. Its working principle is to automatically identify electronic tags attached to items through wireless radio frequency signals and obtain corresponding data without establishing Physical contact, full automation of identification and reading and writing processes, is one of the core technologies of the Internet of Things. A complete RFID system usually consists of three parts: tag, reader, and back-end database (or server). The tag is usually embedded in the entity and has a unique identification. When the tag enters the recognition range of the reader, the reader and the tag will verify the legitimacy of each other's identity through a security protocol. After the verification is passed, the tag will ...

AI Technical Summary

Problems solved by technology

[0005] At present, the traditional RFID authentication protocol widely adopts the dynamic shared key update mechanism to ensure the confidentiality and integrity of the data. However, these authentication protocols are usually inefficient and costly.

At the same time, there are many security risks in the existing lightweight RFID authentication protocol, and it is difficult to resist asynchronous attacks, replay attacks, cloning attacks and other malicious attacks, and the privacy security of communication data is challenged

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