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Optical image encryption method based on circuitous cylindrical diffraction and compressive sensing

A technology of compressed sensing and encryption method, which is applied in the field of information security and information optics, can solve problems such as hidden dangers of system security, and achieve the effects of good security, large number of secret keys, and strong sensitivity

Active Publication Date: 2018-09-28
SICHUAN UNIV
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Problems solved by technology

In order to improve the encryption capacity and reduce the pressure of transmission bandwidth, compressed sensing is introduced into the encryption of optical images, but since both double random phase and compressed sensing can be regarded as linear systems, there are great hidden dangers in the security of the system

Method used

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  • Optical image encryption method based on circuitous cylindrical diffraction and compressive sensing
  • Optical image encryption method based on circuitous cylindrical diffraction and compressive sensing
  • Optical image encryption method based on circuitous cylindrical diffraction and compressive sensing

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Embodiment Construction

[0016] A typical embodiment of an optical image encryption method based on devious cylindrical diffraction and compressed sensing in the present invention will be described in detail below, and the method will be further described in detail. It is necessary to point out here that the following examples are only used to further illustrate the method, and cannot be interpreted as limiting the protection scope of the method. Those skilled in the art make some non-essential aspects of the method according to the method content above. Improvements and adjustments still belong to the protection scope of the present invention.

[0017] The invention proposes an optical image encryption method based on roundabout cylindrical diffraction and compressed sensing, which includes two processes of optical encryption and decryption.

[0018] This embodiment consists of figure 1 shown figure 1 (a) encryption and figure 1 (b) Decrypt both parts. The encryption process consists of two step...

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Abstract

The invention provides an optical image encryption method based on circuitous cylindrical diffraction and compressive sensing. According to the method, a simple improvement on a classical first-compressive sensing and second-double random phase encoding encryption technique is performed, a cylindrical phase plate is used to replace a plane phase plate, and two reflection relay cylindrical diffraction processes are used to replace two continuous relay plane diffraction processes. By using the asymmetry between the two reflection relay cylindrical diffraction processes and a reverse process, thesecurity of the encryption method can be greatly improved, particularly, known plaintext attacks, ciphertext-only attacks and phase recovery attacks can be effectively resisted, keys are large in number and strong in sensitivity, a large key space can be realized, and good security can be ensured.

Description

technical field [0001] The invention relates to the technical fields of information security and information optics, in particular to an optical image encryption method. Background technique [0002] The application research of dual random phase encoding technology and optical interference theory in image encryption is a hot topic in the field of optical information security research in recent years. The dual random phase encoding technology proposed by B. Javidi of the United States in 1995 is an important application of optical theory in the field of information security. In order to improve the encryption capacity and reduce the pressure of transmission bandwidth, compressed sensing is introduced into the encryption of optical images. However, since both double random phase and compressed sensing can be regarded as linear systems, there are great hidden dangers in the security of the system. In order to improve the anti-attack ability of this kind of encryption method, a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T9/00G06F21/60
CPCG06F21/602G06T9/00
Inventor 王君王琼华刘琦
Owner SICHUAN UNIV
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