A Bluetooth broadcast encryption communication method and system

Abstract

The present invention proposes a Bluetooth broadcast encryption communication method and system. When generating the public key, the present invention adopts a hybrid Hash algorithm F on the basis of the traditional ECDH algorithm, and uses the communication frequency band freq agreed by equipment A and B as one of the parameters. Calculate the public key of the current device, which further enhances the security and greatly increases the difficulty of reverse cracking from the public key to the private key, and can be used to meet the requirements for batch, real-time, security and privacy of the device. Bluetooth broadcasting Communication scenarios, such as production line automation, large-scale device parameter configuration or home smart device multi-terminal group private information transmission, etc.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a Bluetooth broadcast encrypted communication method and system. Background technique [0002] In recent years, the country has promoted the comprehensive development of the mobile Internet of Things as a new national development strategy. More and more intelligent devices are rapidly entering all aspects of our lives. Bluetooth, as a relatively mature short-distance wireless communication technology, At the same time, it has technical advantages such as small module size, low cost, and low power consumption, and has been widely used in various mobile communication devices and smart electronic products. [0003] The traditional Bluetooth communication method is to establish a connection first, and there are many limitations in establishing a connection: [0004] The main limitation is the limit on the number of Bluetooth pairing connections. The Bluetooth on the market is ...

AI Technical Summary

Problems solved by technology

[0003] The traditional Bluetooth communication method is to establish a connection first, and there are many limitations in establishing a connection:

[0004] The main limitation is the limit on the number of Bluetooth pairing connections. The Bluetooth on the market is all pursuing low cost. Low cost means that the Bluetooth chip uses a small memory (RAM), so the number of device connections is very limited. Generally, a Bluetooth device with 48KB RAM can only connect a dozen to 20 devices at most, and the memory will be exhausted.

Then, in some scenarios that require a large number of connected devices at the same time (for example: when calibrating various meters, it is necessary to support the calibration of fifty or sixty devices at the same time, in the process of automatic production line production, it is necessary to configure parameters of devices in batches at the same time, smart furniture group control, etc.), at this time, the communication method of Bluetooth connection cannot meet the demand

[0005] Secondly, there is a certain delay in the pairing connection process, and the connection process is complex and has a certain failure rate, which cannot meet the scenarios that require high real-time communication

Moreover, the traditional pairing process generally requires the use of justwork pairing on devices without input and output. This pairing method requires the process of exchanging keys through wireless channels, and there is a risk of key leakage.

[0006] In addition, traditional broadcast communication uses a specific frequency band for clear text information transmission, so that as long as devices within the coverage of Bluetooth broadcast radio frequency signals can receive broadcast data, the directionality and privacy of communication cannot be guaranteed.

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