Encryption method for wireless local area network

Abstract

The invention relates to an encryption method for a wireless local area network, which comprises the following steps of: dividing a first group of plaintext codes into four code words by taking a word as a unit and dividing a first group of main key codes into four key words by taking a word as a unit; operating a first key word to a third key word with a zeroth key word in the first group of main key codes to generate one word length of a first turn of subkey, then shifting the first key word to the third key word forwards to the positions of the zeroth key word to a second key word and shifting the first turn of subkey to the position of the third key word; feeding a second group of plaintext codes, wherein at least four turns of clock periods are spaced between the second group of plaintext codes and the first group of plaintext codes; meanwhile, feeding a second group of main key codes, wherein the time interval between the second group of main key codes and the first group of main key codes is the same as that between the second group of plaintext codes and the first group of plaintext codes. The method greatly improves encryption and decryption speed and data throughput in unit time and data safety is high.

Description

technical field [0001] The invention relates to a method for realizing a packet encryption algorithm, in particular to an encryption 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. The cost is too high, and the c...

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, compared with the related performance of decryption, users Often more attention is paid to the performance indicators of encryption, so how to improve the encryption speed of cryptographic algorithms while satisfying the security of encrypted data is a new problem

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