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Bluetooth device and communication method thereof

A technology of bluetooth device and communication method, which is applied in the field of bluetooth, can solve the problems of destroying data communication and being easy to be intercepted, and achieve the effect of improving security and preventing interception

Active Publication Date: 2012-04-18
BEIJING WATCH DATA SYST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, because Bluetooth communication is a wireless transmission method, the data packets transmitted each time will be exposed and easily intercepted, unlike cable transmission, which has better confidentiality sex
If the wirelessly transmitted data is intercepted by other means, especially the initial connection key and device address, various keys can be obtained and data content can be decrypted, such as command content and address parameter content can be easily obtained, and It can disguise its own identity, thereby destroying normal data communication

Method used

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  • Bluetooth device and communication method thereof
  • Bluetooth device and communication method thereof
  • Bluetooth device and communication method thereof

Examples

Experimental program
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Embodiment 1

[0068] The detailed flowchart of the Bluetooth device communication method in the embodiment of the present invention is given below in conjunction with the accompanying drawings, as shown in FIG. figure 2 shown, including:

[0069] Step 201, the host device A that conforms to the Bluetooth protocol sends out an inquiry command packet that conforms to the standard format of the Bluetooth protocol in the form of broadcast, and waits for the response information returned by the surrounding peer device B, and the device B that conforms to the Bluetooth protocol near the device A receives the message sent by the device A inquiry command packet;

[0070] Step 202, device B parses the received data packet, responds according to the specific command content in the data packet, and carries its own first address BD_ADDR in the response message B ';

[0071] In this embodiment, the first address is the 6-byte global unique address BD_ADDR after the device B leaves the factory B ’ as...

Embodiment 2

[0104] The difference from Embodiment 1 is that the key negotiation uses the address that uniquely identifies the Bluetooth device, and the specific process is as follows:

[0105] Step 1. The host device A that conforms to the Bluetooth protocol sends out an inquiry command packet that conforms to the standard format of the Bluetooth protocol in the form of broadcast, and waits for the response information returned by the surrounding peer device B. The device B that conforms to the Bluetooth protocol near device A receives the message sent by device A. inquiry command packet;

[0106] Step 2: Device B parses the received data packet, responds according to the specific command content in the data packet, and carries its own first address BD_ADDR in the response message B ;

[0107] In this embodiment, the second address is the 6-byte global unique address BD_ADDR after the device B leaves the factory B ’ as an example. Before device B responds to device A's inquiry, accordi...

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Abstract

The invention discloses a Bluetooth device and a communication method. The method comprises the steps of: before establishing a connection with a Bluetooth device at an opposite end, interacting respective first address with the Bluetooth device at the opposite end; negotiating a relevant key with the Bluetooth device at the opposite end by using a second address per se and / or a second address of the Bluetooth device at the opposite end, wherein one of the first address and the second address of each Bluetooth device uniquely identifies the Bluetooth device, and the other address is obtained by calculating the address which uniquely identifies the Bluetooth device according to set rules; establishing the connection with the Bluetooth device at the opposite end and performing data communication by using the negotiated relevant key; and when address information of the Bluetooth device at the opposite end needs to be carried in the communication process, specifically carrying the first address of the Bluetooth device at the opposite end. The Bluetooth device and the communication method thereof disclosed by the invention can efficiently improve security of data transmission between Bluetooth devices and prevent data from risks of being intercepted and decoded.

Description

technical field [0001] The invention relates to the technical field of bluetooth, in particular to a bluetooth device and a communication method thereof. Background technique [0002] Bluetooth technology is a wireless transmission method with a carrier frequency of 2.4GHz. The current applications are increasingly widespread, such as Bluetooth headsets, Bluetooth keyboards, Bluetooth mice, Bluetooth mobile phones and so on. These Bluetooth devices have many advantages such as small size, low power consumption, low hardware requirements, fast transmission speed, and wide coverage. It is widely used in point-to-point transmission mode and network topology mode. [0003] At present, data communication between Bluetooth devices is mainly based on the specific requirements stipulated in the Bluetooth protocol content to gradually realize the process from searching for devices to finally transmitting data. [0004] At present, the communication methods of Bluetooth devices are...

Claims

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Application Information

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IPC IPC(8): H04B5/02H04L9/32
Inventor 杨俊
Owner BEIJING WATCH DATA SYST
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