Bidirectional security authentication method for RFIP system

Abstract

The invention discloses a bidirectional security authentication method for an RFIP system. Aiming at the defects that according to existing system certification, calculation and storage cost much and are vulnerable to resetting and counterfeit attacks, the bidirectional security authentication method combines pseudo-random numbers, shared secret keys and hash functions to achieve authentication encryption. According to the method, a label and a back-end data base share a secret key, an identification and the two hash functions; a label identification and a logic operation result encrypted by the hash functions of the system serve as response messages to be sent to the back-end data base, so that system authentication expenses are substantially reduced; the back-end data base carries out system hash function encryption on an authentication secret key and a private hash encryption result and responds the authentication secret key and the private hash encryption result to the label, and reverse authentication carried out by the label on the system is achieved. A reader identification does not need to be stored in the label, pseudo-random numbers are needless to be generated, accordingly, cost of the label is reduced, and the application range of the method is enlarged. The method is high in security, low in cost and complexity and capable of being used in environments with large label scales on the premise that basic authentication functions are completed.

Description

technical field [0001] The invention belongs to the field of radio frequency wireless communication of the Internet of Things, and in particular relates to a secure two-way authentication method of an RFID system based on a hash function. Background technique [0002] Radio frequency identification system, that is, RFID is a technical means of using radio frequency technology to authenticate and identify targets in an open system environment. Its open application environment allows the identification and authentication of both parties to be completed without physical contact. It has the characteristics of long service life and can work in extreme environments such as electromagnetic interference and high temperature. RFID technology has been rapidly applied and developed since its birth. It is widely used in all aspects of life such as large supermarkets, logistics tracking, electronic tickets, parking lot management, access control identification, etc. It has a broad applic...

AI Technical Summary

Problems solved by technology

The hash function is often used as an encryption function because of its fast calculation speed, low resource occupation, and the one-way security encryption feature that the input cannot be deduced from the output. Basic authentication methods based on hash functions such as Hash-Lock protocol, Random Hash-Lock protocol and Hash chain protocol, these methods have obvious security risks, such as plaintext transmission of tag identification, only one-way authentication of tags by readers, and inability to resist eavesdropping and replay attacks, etc.

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