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Data communication method and system

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

Active Publication Date: 2018-02-13
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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  • Data communication method and system
  • Data communication method and system
  • Data communication method and system

Examples

Experimental program
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Embodiment 1

[0028] This embodiment provides a data communication method. During the communication between the first terminal and the second terminal, the first terminal always generates a communication carrier signal. In communication technology, the communication carrier signal is generated by an oscillator and transmitted on a communication channel. The radio wave is 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.

[0029] as attached figure 1 shown, including the following steps:

[0030] S101, the first terminal sends a communication data signal carrying a data packet to be processed,

[0031] 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 can be a sine wave ...

Embodiment 2

[0150] This embodiment provides a data communication system, such as the appendix figure 2 As shown, during 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 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.

[0151] The first terminal 201 is used for sending a communication data signal carrying a data packet to be processed,

[0152] The communication data signal is obtained by modulating the data packet to be processed on the communication carrier signal by the first terminal 201. The communication carrier signal is an unmodul...

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Abstract

The invention provides a data communication method and system. A first terminal starts to detect a first phase difference value of a waveform phase of a communication carrier signal relative to a first start phase when sending a to-be-processed data packet completely, and receives an answer data packet only when the first phase difference value meets a threshold range; a second terminal starts todetect a second phase difference value of the waveform phase of the communication carrier signal relative to a second start phase when receiving completely, and sends an answer data packet only when the second phase difference value reaches to a delta phi; the first terminal and the second terminal simultaneously receive and send data via detecting a phase difference, so the accuracy of timing ofboth parties is greatly improved; and thus, the first terminal and the second terminal are guaranteed to receive and send the answer data packet only at a special high-precision moment, the risk thatthe data received by the first terminal are falsified by the outside in a transmission process is avoided, and the reliability of the answer data packet received by the first terminal is improved.

Description

technical field [0001] The present invention relates to the field of electronic technology, and 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 protocols, after the card reader sends the command data, there will be a frame waiting time (FWT), indicating that Specifies the maximum time frame that the reader will wait to receive a response from the card. That is to say, after the card reader sends an instruction to the card, the card reader is waiting to receive the response data from the card. As long as the data returned within the frame waiting time FWT, the card reader considers the returned data to be 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 w...

Claims

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Application Information

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