Bidirectional authentication method for ultra-lightweight mobile RFID system

Abstract

The invention relates to the technical field of communication, and particularly relates to the safety certification problem among a tag, a reader and a back-end database in a mobile RFID system. The method comprises the following steps: (1) the reader sends the request information to the tag; (2) the reader sends the tag response request information and the own information to the database; (3) thedatabase authenticates the reader and the tag; (4) the reader authenticates the database; (5) the tag authenticates the database. According to the invention, the protocol of the system adopts a cyclic checking function and a simple exclusive-or and cascade algorithm to encrypt the to-be-transmitted information. In this way, the anonymity of the tag and the bidirectional authentication of the system are realized. Meanwhile, the calculation amount of the database and the tag is effectively reduced. A tag random number is generated by a back-end database random number generation mechanism and then is forwarded to the tag or automatically updated through the cyclic checking function. Therefore, the hardware cost of the tag is reduced. According to the invention, a dynamic ID and a cyclic checking function mechanism are utilized, so that the system can resist various attacks.

Description

technical field [0001] The invention relates to the technical field of communication, and more specifically relates to the issue of security authentication among tags, readers and back-end databases in a mobile RFID system. Background technique [0002] Radio Frequency Identification (RFID) technology is a non-contact automatic identification technology. A complete RFID system is composed of three parts: reader, electronic tag and server. The basic working principle of RFID technology is: after the tag enters the magnetic field, it receives the radio frequency signal sent by the reader, and sends out the product information stored in the chip by virtue of the energy obtained by the induced current (passive tag or passive tag), or the tag actively Send a signal of a certain frequency (active tag or active tag), the reader reads and decodes the information, and sends it to the server for relevant data processing. Compared with traditional identification technology, RFID is a...

AI Technical Summary

Problems solved by technology

Among them, the physical method has shortcomings such as short service life, low efficiency, and non-reusability. Based on the Hash function encryption mechanism, it is widely used because of the one-way and confidentiality of the Hash function.

However, existing security protocols cannot fully meet the security requirements of mobile RFID systems.

At the same time, due to the limited computing power and storage capacity of the tag, it is impossible to perform complex calculations and store a large amount of data on the tag, which will increase the cost of the tag while ensuring the security of the protocol

Images