Rapid encoding and decoding method for wireless local area network

Abstract

The invention relates to a rapid encoding and decoding method for a wireless local area network. The method comprises the following steps of: dividing a set of clear text code into four code fields, dividing a primary key code into four code fields, generating a first sub-key with a word length by calculating the key words from the first digit to the third digit and the key word on zero digit in the primary key, forwards moving the key words from the first digit to the third digit, moving the first sub-key to the position of the key word at the third digit, generating a first cipher text wordwith a word length by calculating the first sub-key and a set of clear text codes from the first digit to the third digit and the clear text code on zero digit, forwards moving the codes from the first digit to the third digit, moving the first cipher text word to the position of the code on the third digit, sending a second clear text code, dividing another set of clear text code into four encode words by using word as the unit, and spacing another set of clear text code and the prior set of clear text code for at least four clock periods. The method greatly increases the encoding and decoding speed, promotes the data throughput and widens the use scope.

Description

technical field [0001] The invention relates to a realization 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 overhead. ...

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 large, etc.

Moreover, as the society's demand for information security is getting higher and higher, it also poses great challenges to the circuit implementation of encryption algorithms and the management of keys.

In practical applications, the amount of encrypted data per unit time is relatively small, and if the encryption efficiency is specified, the clock frequency needs to be increased, but it is often difficult to significantly increase the clock frequency in the actual application environment, thus restricting the encryption efficiency. Therefore, it is difficult to meet the application environment that requires high data throughput and high encryption speed.

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