Encryption and decryption circuit structure applied to ZigBee protocol and control method thereof

Abstract

The invention relates to an encryption and decryption circuit structure applied to a ZigBee protocol and a control method thereof. In the circuit structure, on the basis of two pieces of AES (Advanced Encryption Standard) encryption equipment, a circuit is controlled through a control signal and the calculating operations of CCM* (Counter with Cipher block chaining-Message authentication code) encryption / authentication code generation in the ZigBee protocol, CCM* decryption / authentication code identification, an AES-128-based MMO (Mach Maximum Operating) Hash function and the like are respectively realized. In the invention, an AES-CCM* safety mode and the MMO Hash function are realized totally by using a hardware circuit, a load of a CPU (Central Processing Unit) in a ZigBee system is reduced, and unnecessary software attack is also avoided. Meanwhile, in the calculating operation of CCM* encryption / authentication code generation, a parallel running mode of the calculating operation of encryption and the calculating operation of authentication code generation can be used; and in the calculating process of the CCM* decryption / authentication code identification, a parallel running mode of the calculating operation of decryption and the calculating operation of authentication code identification can be used, so that the calculating operation speed of a CMM* mode is quickened.

Description

Technical field [0001] The invention belongs to the field of encryption and decryption technology, and particularly relates to an encryption and decryption circuit structure and method applied to the ZigBee protocol. Background technique [0002] 1. CCM* safe mode [0003] (1) ZigBee (Zigbee) protocol security mechanism [0004] ZigBee technology is a standard wireless network protocol designed for low rate control networks. It has the characteristics of low complexity, low power consumption, low rate, and low cost. It works in the 2.4GHz ISM frequency band with a transmission rate of 20kb / s. ~250kb / s, transmission distance is 10m~75m. The ZigBee protocol stack includes a physical layer, a media access control layer, a network layer, and an application layer, and defines a security service provision mechanism. [0005] The ZigBee standard is established on the basis of the IEEE802.15.4 standard, and its physical layer and media access control layer adopts the IEEE802.15.4 standard. ...

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Problems solved by technology

So far, for the circuit structure and method of combining MMO Hash function with CCM*, there is no public literature on this aspect at home and abroad

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