Algorithm hardware realizing method for improving network safety

Abstract

The invention relates to an algorithm hardware realizing method for improving network safety. The method comprises the following steps: dividing plaintext codes into 4 coded words by taking a word as a unit and dividing key codes into 4 key words by taking a word as a unit; after performing operation on the first key word to the third key word and a constant, performing exclusive-or operation on the zeroth key word to generate a first turn of key with one word length, forwards moving the position of from the first key word to the third key word to the position of from the zeroth key word and the second key word, and moving the first turn of key to the position of the third key word; after performing operation on the first turn of key and the first coded word to the third coded word, performing exclusive-or operation on the zeroth key word to generate a first turn of ciphertext word, forwards moving the position of from the first coded word to the third coded word to the position of from the zeroth coded word to the second coded word, and moving the first turn of ciphertext word to the position of the third coded word. By the method, the area for realizing algorithm hardware is compact, and the circuit area for realizing the algorithm hardware is greatly reduced on the premise of guaranteeing the algorithm realizing efficiency.

Description

technical field [0001] The invention relates to a hardware implementation method of a packet encryption and decryption algorithm, in particular to an encryption and decryption method for a wireless local area network. Background technique [0002] With the wide application of WLAN, its security issues are becoming more and more prominent. For wireless local area networks, it is very vulnerable in terms of security, because the transmission rate can reach 11M, and the coverage range is up to 100 meters. It is its fast transmission speed and wide coverage that make it very vulnerable in terms of security. Because the data is exposed in the air during transmission, it is easy to be intercepted by people with ulterior motives. [0003] At present, most of the existing algorithms are realized by software, which is simple and convenient, but its calculation speed is not ideal, and it is difficult to meet the real-time needs, while the hardware implementation has a large hardware...

AI Technical Summary

Problems solved by technology

Because the data is exposed to the air during transmission, it is easy to be intercepted by people with ulterior motives

[0003] At present, in the implementation methods of existing algorithms, most of them are realized by software method, which is simple and convenient, but its operation speed is not very ideal, it is difficult to meet the real-time needs, and the hardware implementation method has a large hardware overhead. The cost is too high, the circuit implementation area and power consumption are insufficient, so for some environments with high area requirements, such as the application of smart cards, the use of existing encryption and decryption methods is greatly restricted

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