Label reader-writer and data communication method and system of radio frequency label

Abstract

The invention discloses a label reader-writer and data communication method and system of a radio frequency label, wherein the method comprises the following steps of: obtaining the ID (Identity) of the radio frequency label through a certification request by the label reader-writer; after the label reader-writer certifies that the radio frequency label is a legal label, computing a derived key of the radio frequency label according to a master key per se and the obtained ID; carrying out data interaction of the label reader-writer and the radio frequency label, wherein cryptograph data encrypted through the key are interacted for sensitive data; and directly carrying out data interaction for non-sensitive data. The system comprises an ID acquisition module, a key computation module and acommunication module which are arranged on the label reader-writer. The invention realizes the safety communication between the label reader-writer and the radio frequency label.

Description

technical field [0001] The invention relates to a radio frequency identification system, in particular to a tag reader, a radio frequency tag data communication method and a system. Background technique [0002] RFID (radio frequency identification) system usually consists of tag reader, radio frequency tag and background database, such as figure 1 As shown, the tag reader communicates with the background database through the interface module; the tag reader and the radio frequency tag each transmit and receive data through the sending module and the receiving module under the action of the controller, and perform radio frequency communication between the two sides through the antenna. communication. [0003] At present, RFID technology is developing rapidly at home and abroad, and there are many varieties. More and more manufacturers are investing in the field of radio frequency identification. While RFID is widely used, because it is based on radio frequency technology i...

AI Technical Summary

Problems solved by technology

[0007] 1. Reader and Tag transmit signals without mutual authentication, so the reliability and legitimacy of Reader and Tag cannot be guaranteed;

[0008] 2. The information interaction between Reader and Tag is transmitted in plain text, and PC, EPC, etc. are easily stolen by attackers, so the tag may be tracked;

[0009] 3. The communication between Reader and Tag cannot resist retransmission attacks

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