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A data communication method and system

A technology for data communication and communication of data signals, applied in the field of data communication methods and systems, and can solve problems such as data tampering and attacks

Active Publication Date: 2020-02-21
TENDYRON CORP
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  • Summary
  • 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 a 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 signal ...

Embodiment 2

[0146] This embodiment provides a data communication system, as attached figure 2 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.

[0147] The first terminal 201 is configured to send a communication data signal carrying a data packet to be processed,

[0148] 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 unmodulat...

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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 detect the first phase difference of the waveform phase of the communication carrier signal relative to the first initial phase, and only at the first phase difference Receive the response data packet when the threshold phase difference is reached; the second terminal starts to detect the second phase difference of the waveform phase of the communication carrier signal relative to the second initial phase after receiving it, and sends a response only when the second phase difference is reached Data packets, the first terminal and the second terminal send and receive data at the same time by detecting the phase difference, 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, The risk of the data received by the first terminal being tampered with by the outside during transmission is avoided, 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): H04W4/80H04W12/02H04W12/06H04L29/06
CPCH04L63/0442H04L63/0869H04W12/02H04W12/06
Inventor 李明
Owner TENDYRON CORP
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