Lorenz chaotic pseudo-random sequence generator based on m sequence

Abstract

The invention discloses a Lorenz chaotic pseudo-random sequence generator based on an m sequence. The generator comprises an initial value selection module, a Lorenz chaotic iteration module, a quantification module and an m sequence disturbance module, wherein the initial value selection module is used for giving an initial value needed by a Lorenz chaotic equation before Lorenz chaotic iterationis started and giving an output value generated in last iteration to next iteration to serve as an initial value; the Lorenz chaotic iteration module realizes operation of the Lorenz chaotic equationthrough floating point fractional arithmetic and generates a chaotic real value sequence; the quantification module converts the chaotic real value sequence into a pseudo-random sequence through a bit sequence design method; and the m sequence disturbance module generates the m sequence through a linear feedback shift register and uses the m sequence to disturb the chaotic real value sequence, the disturbed chaotic real value sequence is returned to the initial value selection module, and next iterative operation is performed. The generator overcomes the defect of randomness of an existing pseudo-random sequence, and the generator has a large key space, can resist an exhaustive attack and meets the requirements of various application occasions.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to an m-sequence-based Lorenz chaotic pseudo-random sequence generator. Background technique [0002] Pseudo-random sequences are widely used in many scientific and engineering fields such as information encryption and spread spectrum communication. Designing pseudo-random sequences with excellent performance has become a current research hotspot. Chaos is a random-like behavior that can occur in a deterministic nonlinear dynamic system without adding any random factors. It is a seemingly random movement, and its long-term behavior of the system is unpredictable. Due to the extreme sensitivity of chaos to the initial conditions and the inherent good pseudo-random characteristics, the research on the pseudo-random sequence generator based on chaos theory has become a new and beneficial exploration, which is of great importance in the fields of theoretical res...

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Problems solved by technology

[0005] In order to solve the technical problems proposed by the above-mentioned background technology, the present invention aims to provide a Lorenz chaotic pseudo-random sequence generator based on m-seque

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