Encryption method for wireless local area network

Abstract

The invention discloses an encryption method for a wireless local area network. The encryption method comprises the steps of dividing a first set of plaintext codes into four coded words with a word as a unit, dividing a first set of master key codes into four secret key words with a word as a unit, allowing a first-bit secret key word, a second-bit secret key word and a third-bit secret key word in the first set of master key codes to be operated with a zero-bit secret key word to form a first round of sub-keys in the length of one word, then forwards moving the first-bit secret key word, the second-bit secret key word and the third-bit secret key word to the position of the zero-bit secret key word, the position of the first-bit secret key word and the position of the second-bit secret key word, moving the first round of sub-keys to the position of the third-bit secret key word, inputting a second set of plaintext codes, allowing the second set of plaintext codes and the former set of plaintext codes to be at the interval of at least four rounds of clock periods, meanwhile, inputting a second set of master key codes, and allowing a time interval between the second set of master key codes and the former set of master key codes to be the same as the time interval between the second set of plaintext codes and the first set of plaintext codes. The encryption method for the wireless local area network greatly improves encryption and decryption speed and data handling capacity in unit time, and safety of data 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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