Chaotic sequence generation method and sequence generator of high speed high-precision chaotic function

Abstract

The invention discloses a chaotic sequence generation method and a sequence generator for high-speed high-accuracy chaotic functions. An initial key circuit stores the initial value of a chaotic latch unit, a u value key circuit stores a sequence ui value; each cp chaotic function finishes one-time interactive operation: a bitwise conversion circuit outputs a bitwise XOR to the chaotic latch unit, the bitwise XOR is used to realize a subtraction operation N minus one and minus the absolute value of xi and so on; a shift data selector takes the ui as an address code of the data selector, the data is shifted with a plurality of bits toward right, then the subtraction is used to realize a multiplication that the ui is multiplied by the data; the subtraction result is stored into the chaotic latch unit at the rising edge of the cp, each cp generates a 160-bit chaotic output; the randomness is good due to the existence of an initial key and a u value key; the precision is far greater than that of the double type, the cycle of the cp can reach 90ns, the encryption of a 128-bit plaintext needs 1.7us; the invention can be realized by using FPGAs, GPLDs and ASICs and so on, and is used in the network security technical field, particularly in the wireless networks and the wireless sensor networks.

Description

(1) Technical field The invention belongs to the technical field of network security, and specifically relates to a high-speed and high-precision chaotic sequence generation method and sequence generator of a chaotic function. (2) Technical background Encryption is now an important means to ensure data security. At present, the rise of the Internet, wireless networks and wireless sensor networks makes encryption technology increasingly important. Although traditional encryption methods such as DES and RSA are widely used and show strong security, 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. For example, DES has now been deciphered. RSA is 100 times slower than DES and has a high computational cost. Elliptical curve encryption consumes a lot of hardware resources. Quantum encryption is theoretically an absolutely secure encryption technology, b...

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