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Unidirectional open source data transmission method

A data transmission, one-way technology, applied in digital transmission systems, transmission systems, electrical components, etc., can solve problems such as limited key length, low RSA efficiency, and heavy processor workload

Active Publication Date: 2007-05-23
BEIJING C&W ELECTRONICS GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] 2. Insufficient security, its key length is limited, only 64 bits, and its key information may also be leaked during programming
[0010] 3. It is necessary to add chips at both ends of the transmitter and receiver, which will greatly increase the cost of the product and the power consumption of the sender
[0014] 2. RSA is inefficient
[0016] Obviously, using the RSA algorithm is complex, the workload of the processor is large, the power consumption is large, and the cost will increase significantly

Method used

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  • Unidirectional open source data transmission method
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  • Unidirectional open source data transmission method

Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0032] data structure

[0033] During transmission, the sender can send different frames with a fixed frame header:

[0034] Frame header = ID+LEN+CMD+CRC, where:

[0035] ID: Addressing information, which is the unique identifier of the sender.

[0036] LEN: frame length.

[0037] CMD: command, which is the frame type.

[0038] CRC: check value, optional 16-bit CRC or 128-bit MD5.

[0039] According to different frame types, the list is as follows:

[0040] frame name

Frame structure and description

configuration frame

Configuration frame = frame header + Tkey (transmission key) + SyncSeq (synchronization

ordinal)+data(other data)

Tkey: Transmission key (length from 128 bits to 256 bits).

SyncSeq: Synchronization sequence number (initial value).

The configuration frame is optional, if the sender and receiver are configured via its

It is done in a way, and this frame may not be realized. This frame is on...

no. 2 example

[0091] As in the system and method in the first embodiment, the synchronization count (SyncCount) and the synchronization sequence number (SyncSeq) used by it can be in a descending order; or the synchronization count is incremented, and the synchronization sequence number is decremented; or the synchronization count is decremented, and the synchronization Ordinal numbers are increasing.

[0092] Wherein, the synchronization count is calculated at intervals of a fixed time T, which is predetermined and not limited to 2 seconds.

[0093] The method involved in the present invention runs on the hardware processors of the sender and the receiver, and can be solidified in the hardware chip.

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PUM

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Abstract

The invention relates to a method for communicating data, wherein sender wirelessly transmits coded information (with Tkey) to the receiver, and synchronously counts; the receiver uses Tkey to decode the information, and judges the time synchronous count. The inventive method can reduce complexity and improve efficiency, while it can avoid false record.

Description

technical field [0001] The invention belongs to a communication method for data transmission, and relates to a method for ensuring that data content cannot be deciphered and cannot be imitated and deceived during the one-way open-source data transmission process. [0002] The one-way means that the transmitter only transmits data, the receiver only receives data, and there is no feedback data from the receiver to the transmitter. [0003] The open source means that during the data transmission process, other users besides the designated recipients can also obtain their information (such as radio communication, network broadcasting, etc.). [0004] The method particularly relates to a method used in a computer token system, which is used for preventing intruders from deciphering authentication information and preventing recording and playback cheating. Background technique [0005] In the prior art, security products for one-way transmission mainly use fixed coding integrate...

Claims

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Application Information

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IPC IPC(8): H04L9/00
Inventor 张正新
Owner BEIJING C&W ELECTRONICS GRP