Method and device of updating secret key in Bluetooth mesh

Abstract

The invention relates to the field of Bluetooth meshes in the internet of things, and particularly relates to a method and a device of updating a secret key in a Bluetooth mesh. The method and deviceare used for updating the secret key smoothly so as to improve security of network communication. The method comprises the step that a network management device sends a new secret key to each node soas to trigger each node to update the secret key gradually according to three stages. The nodes of different processing rates are guaranteed to seamlessly switch from the old secret key to the new secret key timely and smoothly, further, if a certain node fails, the BLE Mesh is protected from being invaded and attacked by illegal nodes, so that the secret key is updated smoothly, and network communication is safer.

Description

technical field [0001] The present invention relates to the technology of Internet of Things, in particular to a method and device for updating a key in a Bluetooth ad hoc network. Background technique [0002] The Internet of Things (IoT) refers to a huge network formed by combining with the Internet to collect all kinds of information required by any object or process that needs to be monitored, connected, and interacted in real time through various information sensing devices. Its purpose is to realize the connection between things and things, things and people, and all things and the network, which is convenient for identification, management and control. In short, the Internet of Things is the Internet of things connected. [0003] Bluetooth Low Energy (BLE) is an intelligent, low-power Bluetooth wireless technology that realizes short-distance communication between smart devices. It has the advantages of low complexity, low power consumption, and low cost. It has bee...

AI Technical Summary

Problems solved by technology

When the key is illegally cracked, the nodes of other networks will obtain the relevant data of the above-mentioned BLE Mesh, which will lead to the leakage of network data and affect the operation and management of nodes

[0007] For example, in BLE Mesh, when a smart home controlled by a mobile phone terminal fails, if the key stored on the smart home is cracked by nodes in other networks, the nodes in other networks can monitor the smart home. control, thereby affecting the network security of the above-mentioned BLE Mesh and the normal use of the above-mentioned mobile terminal

[0008] Therefore, in BLE Mesh, it is necessary to regularly update the keys used on each node, and it is necessary to realize the seamless switching between the old key and the new key to achieve a smooth transition. There is no corresponding key update method designed

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