Dynamic probability 16cap mapping encryption method

Abstract

The invention relates to a dynamic probability 16cap mapping encryption method, and the method comprises the following steps: setting an initial value X(0) and a parameter u, and generating an outer-layer chaotic sequence; sequentially taking an element and a parameter u in the outer-layer chaotic sequence as secret keys, generating a plurality of strings of inner-layer chaotic sequences, and enabling the inner-layer chaotic sequences to be in one-to-one correspondence with time sequences; disordering the inner-layer chaotic sequence into non-uniform distribution conforming to Gaussian distribution through CCDM; and changing the occurrence probability of the 16CAP signal in each circle in the constellation diagram through the non-uniformly distributed inner-layer chaotic sequence, so thatthe probability distribution of the inner circle and the outer circle conforms to Maxwell-Boltzmann distribution. According to the method, the non-uniformly distributed chaotic sequence and the signalare subjected to exclusive-OR processing, and the constellation point probability is dynamically adjusted, so the constellation point generation probability conforms to Gaussian distribution. The 16CAP signal constellation diagram inner ring probability is increased, the 16CAP signal constellation diagram outer ring probability is reduced, the effect of reducing the optical power and the bit error rate of a receiving end can be achieved, and the signal transmission rate is indirectly improved. According to the invention, probability forming is applied to chaotic encryption, so the security ishigher.

Description

technical field [0001] The invention belongs to the communication field and relates to a dynamic probability 16cap mapping encryption method. Background technique [0002] Optical communications are widely used for personal, commercial, and military communications, and like other types of networks, the first lines for securing optical communications begin with the adoption of encryption protocols at the higher layers of the protocol stack. The physical layer of optical communication networks is equally vulnerable to various attacks, including jamming, physical infrastructure attacks, eavesdropping and interception. However, building security on top of insecurity is a dangerous practice, and targeting threats at the lowest layers of optical networks requires securing the physical layer of optical communication systems. [0003] Encryption is an effective way to protect signals and enhance network confidentiality in the physical layer. Without knowing the encryption key, it i...

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Problems solved by technology

However, chaotic encryption also has the problem of high requirements for r

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