Radio frequency device, radio frequency card reader and related communication system and communication method

Abstract

The invention relates to the field of radio frequency secure communication and provides a radio frequency device, a radio frequency card reader corresponding to the radio frequency device, and a communication system and a radio frequency secure communication method which use the radio frequency device and the radio frequency card reader. The radio frequency device comprises a radio frequency receiving and transmitting module, a radio frequency antenna and a magnetic induction and receiving module; and the radio frequency card reader comprises a radio frequency receiving and transmitting module, a radio frequency antenna and a magnetic transmitting module. Two communication channels, namely a first low-speed unidirectional communication channel with a stable and controllable distance and asecond high-speed communication channel, with different characteristics are available between the radio frequency device and the radio frequency card reader, wherein the first communication channel is formed by communicating with a magnetic field and is used for transmitting a small data volume of information for identity authentication so as to prevent malicious interference and attack; the second communication channel is formed by using the radio frequency receiving and transmitting module and is used for finishing the identity authentication and a main transaction process; and through the system and the communication method, near field secure communication with a controllable distance can be realized better.

Description

technical field [0001] The present invention relates to a device, method and system for performing short-distance secure data communication with controllable distance between a radio frequency terminal and a radio frequency communication device, in particular to a radio frequency communication terminal containing a radio frequency device (such as a radio frequency card) or a short distance radio frequency communication function (such as mobile phones, PDAs) and short-range radio frequency communication devices (such as POS machines or card readers; POS, that is, Point of sales, point of sale) distance control communication equipment, systems and secure communication methods. Background technique [0002] Today, radio frequency communication terminals, especially radio frequency cards, have been popularized. Through transformation, mobile or fixed communication terminals have short-distance communication functions, especially the demand for electronic payment and other functio...

AI Technical Summary

Problems solved by technology

This method needs to obtain the near-field spectrum of each RF control terminal through experiments and other methods in advance, which is called calibration. This process requires high requirements and is relatively complicated; moreover, this method is based on the field strength of RF signals and is easily interfered by RF signals. The system needs to be shielded and Eliminating this interference requires a complex approach to

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