Lightweight dynamic key data encryption device and method

Abstract

The invention discloses a lightweight key dynamically variable data encryption device and method. The lightweight dynamic key data encryption device comprises a server and nodes; wherein the server comprises a key generation module, a key synchronization module, an encryption and decryption module and a key updating module; and the node comprises a key requesting module, a key synchronization module and an encryption and decryption module. After the node initiates a session request, the server generates a session key (second key) if the identity is valid; then the synchronization of the secondkey is completed through two times of encrypted communication, and two-way data encryption communication is performed; the second key generation, synchronization and data communication steps are repeated after a key updating cycle until the communication is completed. The XOR operation is used in the encryption and decryption process, therefore, the operate mode is simplified; and the second keysynchronization, updating and data encryption and decryption are realized under the condition of little consumption of node resources, therefore, the contradiction between the limited Internet of things node resources and energy consumption and the complex security algorithm is effectively solved; meanwhile, the key length and updating cycle are variable, therefore, the difficulty of deciphering is increased, and the communication security can be protected better.

Description

technical field [0001] The invention relates to the field of network communication, and is especially applicable to the field of the Internet of Things, in particular to a light-weight dynamic key data encryption device and method. Background technique [0002] With the vigorous development of Internet of Things technology, various small electronic devices have penetrated into various fields such as daily life, industrial production, and field detection. While the Internet of Things technology brings convenience to people's production and life, its security is also facing severe challenges. Especially for IoT nodes with few computing resources and limited energy consumption, communication security is easily overlooked and lacks effective protection. [0003] Although various existing security algorithms are becoming more and more complete, they often need to consume more computing resources, storage resources, and energy consumption, and are not suitable for IoT nodes with ...

AI Technical Summary

Problems solved by technology

While the Internet of Things technology brings convenience to people's production and life, its security is also facing severe challenges

Especially for IoT nodes with few computing resources and limited energy consumption, communication security is easily overlooked and lacks effective prote

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