Chaos encrypting and decrypting method without multiply and divide of chaos function and circuit thereof

Abstract

The invention discloses a chaotic encryption method without multiplication and division of a high-speed high-precision chaotic function and an encryption circuit, the encryption circuit includes a plaintext chaotic queuing-chaotic XOR circuit and a chaotic sequence generator; the queuing codes and the chaotic signal are firstly carried out the XOR to be converted into the nd sites of chaotic queuing codes as the address codes, 8 data selectors select 8 from the 8 multiplied by 2<nd> sites of parallel plaintext to be taken as the 1 byte chaotic re-queuing plaintext, then the XOR with the another chaotic signal is carried out to produce 1 byte ciphertext, 2<nd> of cp can encrypt 8 multiplied 2<nd> sites of ciphertext; each cp of the chaotic sequence generator generates 8 multiplied by (2<nd> plus nd) sites of chaotic outputs, wherein, the deduction calculation of N minus 1 minus the absolute value of xi and so on are realized by using XOR, the multiplication of Mui multiplied by data isrealized by using the deduction; the invention has an queuing code key, an initial value key and a Mu value key, the safety is high; the nd is equal to 4, the encryption of 128 sites of plaintext needs about 1.7Mus; the method can be realized by using FPGA, CPLD and ASIC, which is used in the network safety technology field, in particular to a wireless network and a wireless sensor network.

Description

(1) Technical field [0001] The invention belongs to the technical field of network security, in particular to a chaotic encryption method without multiplication and division and an encryption circuit thereof. (2) Technical background [0002] Encryption is an important means to ensure data security now. At present, the rise of Internet, wireless network and wireless sensor network makes encryption technology more and more important. Traditional encryption methods such as DES, RSA, etc. are now widely used and show strong security, but they are all completed on the premise of sufficient resources, and are not suitable for wireless networks and wireless networks with serious shortage of resources. Sensor networks, such as DES, have now been deciphered. RSA is 100 times slower than DES, and the calculation cost is very high. Elliptic curve encryption consumes a lot of hardware resources. Quantum encryption is theoretically an absolutely safe encryption technology, but it is st...

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