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A data communication method and system

A data communication and communication data signal technology, applied in the field of data communication methods and systems, can solve the problems of data tampering and attack, and achieve the effect of eliminating the risk of being tampered by the outside world, improving accuracy, and improving reliability

Active Publication Date: 2020-02-21
TENDYRON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Then in the above communication protocol, if the middleman intercepts the data sent by the card reader and returns the response data within the FWT time, the card reader will think that the source of the data is reliable. It can be seen that the scheme is attacked by the middleman, the data is tampered with, etc. Security Risk

Method used

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  • A data communication method and system
  • A data communication method and system
  • A data communication method and system

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Experimental program
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Embodiment 1

[0026] This embodiment provides a data communication method. During the communication process between the first terminal and the second terminal, the first terminal always generates a communication carrier signal. In terms of communication technology, the communication carrier signal is generated by an oscillator and transmitted on the communication channel. The radio waves are modulated and used to transmit data. In this embodiment, the communication carrier is generated by the first terminal as a carrier for transmitting data information.

[0027] as attached figure 1 shown, including the following steps:

[0028] S101. The first terminal sends a communication data signal carrying a data packet to be processed,

[0029] The communication data signal is obtained by modulating the data packet to be processed on the communication carrier signal by the first terminal. The communication carrier signal is an unmodulated periodic oscillation signal. The communication carrier signa...

Embodiment 2

[0147] This embodiment provides a data communication system, such as image 3 As shown, in the communication process between the first terminal 201 and the second terminal 202, the first terminal 201 always generates a communication carrier signal, and the second terminal 202 receives the communication carrier signal. In terms of communication technology, the communication carrier signal is generated by an oscillator and The radio waves transmitted on the communication channel are modulated and used to transmit data. In this embodiment, the communication carrier is generated by the first terminal 201 as a carrier for transmitting data information.

[0148] The first terminal 201 is configured to send a communication data signal carrying a data packet to be processed,

[0149] The communication data signal is obtained by the first terminal 201 by modulating the data packet to be processed on the communication carrier signal. The communication carrier signal is an unmodulated pe...

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Abstract

The present invention provides a data communication method and system. When the first terminal finishes sending the data packets to be processed, it starts to record the number of pulses of the first terminal of the communication carrier signal sent by the first terminal, and only when the number of pulses of the first terminal reaches the threshold Receive the response data packet when the number of pulses is N; the second terminal starts to record the number of second terminal pulses of the communication carrier signal received by the second terminal after receiving it, and sends the response data packet only when the number of pulses of the second terminal reaches N , the first terminal and the second terminal send and receive data at the same time by detecting the number of pulses, which greatly improves the timing accuracy of both parties, thus ensuring that the first terminal and the second terminal only send and receive response data packets at specific high-precision moments, avoiding The risk of the data received by the first terminal being tampered with by the outside during the transmission process is reduced, and the reliability of the response data packet received by the first terminal is improved.

Description

technical field [0001] The present invention relates to the field of electronic technology, in particular to a data communication method and system. Background technique [0002] The existing non-contact IC card reader card reading mechanism is based on 14443, 15693 and other communication protocols for data transmission. In the above protocol, there will be a frame waiting time (FWT) after the card reader sends command data, indicating that Specifies the maximum time range for the reader to wait to receive card response data. That is to say, after the card reader sends the command to the card, the card reader is waiting to receive the response data of the card. As long as the data returned within the frame waiting time FWT, the card reader considers the returned data legal. Then in the above communication protocol, if the middleman intercepts the data sent by the card reader and returns the response data within the FWT time, the card reader will think that the source of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W12/10G06K17/00H04W12/106
CPCH04W12/10G06K17/0029
Inventor 李明
Owner TENDYRON CORP
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