Computational ghost imaging image encryption method based on chaotic mapping and DNA coding

Abstract

The invention provides a computational ghost imaging image encryption method based on chaotic mapping and DNA coding, and belongs to the field of optical encryption. According to the method, the key quantity of a traditional calculation ghost imaging encryption system can be reduced, the key space is increased, the problem that the traditional calculation ghost imaging encryption system is prone to being attacked linearly is solved, and the security of the encryption system is improved. According to the main method, a random sequence generated by Logistic chaotic mapping is used for constructing a measurement speckle matrix of a ghost imaging system, and the chaotic sequence is determined by initial values and system parameters, so that the initial values and the system parameters play a role in encrypting a system key, the key quantity of the encryption system is greatly reduced, and the sensitivity of the chaotic sequence to an initial value and system parameters also increases the key space; and partitioning and DNA operation are carried out on a decimal real number measured value detected by a barrel detector, so that the inherent defect that a ghost imaging system is prone to being attacked in a linear mode is overcome, and the system safety is improved.

Description

technical field [0001] The invention belongs to the field of optical encryption. Background technique [0002] Since Klyshko proposed the ghost imaging scheme in 1988, ghost imaging has received more and more attention because of its remarkable physical properties. Since the measurement results of ghost imaging represent information that has nothing to do with the target image, it has been introduced into the field of optical information security very early. Compared with the traditional optical encryption method, ghost imaging does not encrypt the target image into a complex-valued matrix, but a simple intensity vector, which is very beneficial to the recording, storage and transmission of encrypted information, so this type of optical encryption technology has been obtained developed rapidly. [0003] figure 1 Schematic diagram of the encryption process of traditional computational ghost imaging. In this encryption system, the two-dimensional target image (plaintext) is...

AI Technical Summary

Problems solved by technology

However, since the system uses a large number of measured speckle matrices as encryption keys, the amount of key data that needs to be transmitted for decryption is very large; and the linearity between plaintext and ciphertext also brings potential threats to attackers. Attacks are convenient, and system security is flawed

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