Regularized cosine transformation chaotic double-random phase encoding optical image encryption method

A chaotic random phase and double random phase technology, applied in image coding, image data processing, computer security devices, etc., can solve the problem of inconvenient updating of random phase masks, inconvenient key management and transmission, and encryption systems vulnerable to selected plaintext attacks. and known plaintext attacks, etc., to achieve the effect of convenient key management and transmission, security assurance, and reduction of calculation amount.
CN106503568AInactive Publication Date: 2017-03-15TIANJIN UNIV
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
TIANJIN UNIV
Publication Date
2017-03-15
Estimated Expiration
Not applicable Β· inactive patent

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Abstract

The invention relates to the technical field of image information safety and light information processing and aims at effectively resisting known plaintext attack and selected plaintext attack, making key management and transmission convenient, further ensuring the safety and obtaining good violent attack, statistics attack, noise attack and shear attack resisting capability. According to the adopted technical scheme, a regularized cosine transformation chaotic double-random phase encoding optical image encryption method comprises the following steps that 1, a two-dimensional regularized cosine transformation CCT system is established; 2, a chaotic secret key is generated, wherein two random phase masks playing a main secret key effect are respectively generated by a one-dimensional sine chaotic system controlled by different chaotic parameters, and an initial value and control parameters of the sine chaotic system serve as main secret keys; 3, image encryption and decryption process is performed, wherein decrypted images are obtained. The method is mainly applied to image information safety and light information processing occasions.
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Description

technical field

[0001] The invention relates to the technical fields of image information security and optical information processing, in particular to an optical image encryption method based on canonical cosine transform (CCT) and chaotic double random phase encoding. Background technique

[0002] As one of the most popular multimedia forms at present, digital images are widely used in the fields of politics, economy, military affairs, education and so on. In today's highly developed Internet technology, how to protect digital images from tampering, illegal copying and dissemination has important practical significance. The research on image encryption technology has become one of the hotspots in the field of information security.

[0003] Optical information processing technology has aroused great interest in the field of image encryption research because of its high processing speed, high parallelism, and fast realization of convolution and correlation operations (see l...

Claims

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