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Optical encryption method based on correlated imaging

A technology associated with imaging and encryption methods, applied in image data processing, image data processing, instruments, etc., can solve the problem of heavy workload for receivers, disadvantageous receiver optical decryption, etc., to enhance the difficulty of deciphering, ensure security, and ensure security sexual effect

Active Publication Date: 2020-02-07
UNIV OF SHANGHAI FOR SCI & TECH
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Problems solved by technology

Associative imaging encryption is to obtain encrypted information through the associated calculation of the key and the ciphertext. The clarity of the obtained plaintext is proportional to the number of calculations. Therefore, the scheme is greatly affected by the number of calculations. The amount is huge, which is not conducive to the receiver's optical decryption

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  • Optical encryption method based on correlated imaging

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Embodiment Construction

[0034] The idea, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings, so as to fully understand the purpose, features and effects of the present invention.

[0035] refer to figure 1 , the optical encryption method based on correlated imaging of the present invention, comprises the following steps:

[0036] S1: Encryption process, including the following sub-steps:

[0037] S11: During the correlative imaging process, multiple random matrices I generated by computer 1 As the key 1, the image to be encrypted A(u, v) is used as the plaintext G(u, v), A(u, v) is a picture with a pixel size of 256×256, and the key 1 and the plaintext G(u, v) are multiplied to generate ciphertext y. Specifically: take the random light field I generated by modulation r (u, v) irradiates the image to be encrypted A(u, v), and the projected or reflected energy value is received by the bucket detector to gen...

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Abstract

The invention relates to an optical encryption method based on correlated imaging. The method comprises the following steps: encryption: taking a plurality of random matrixes generated by a computer as a secret key 1, taking an image to be encrypted as a plaintext, and multiplying the secret key by the plaintext to generate a ciphertext; taking the ciphertext as a constraint, establishing a camouflage image and a plurality of corresponding modulation matrixes, and enabling the camouflage image and the to-be-encrypted image to have the same ciphertext; embedding the random matrix into the modulation matrix through a watermark embedding algorithm and an encryption algorithm of the image to generate a new matrix as a secret key; transmission: transmitting the secret key 2 and the ciphertext at the same time; and decryption: through a watermark extraction algorithm and a decryption algorithm of the image, extracting the secret key 1 from the secret key 2, carrying out association calculation with the ciphertext, reconstructing the encrypted image, and reconstructing a plaintext. According to the optical encryption method, safe information transmission is provided for a user, importantinformation leakage is avoided, the defect that in the prior art, the calculated amount is large is overcome, and the optical decryption process and difficulty of a receiver are simplified.

Description

technical field [0001] The invention relates to the field of optical data encryption transmission, in particular to an optical encryption method based on optical link imaging. Background technique [0002] With the popularization of 5G technology and the rapid development of science and technology, the transmission of information is particularly important. Information security encryption is a business requirement that any company or institution is very concerned about. Data information may be subject to various interception attacks during network transmission, resulting in information leakage and affecting the normal operation and management of enterprise organizations. Therefore, the encryption of optical transmission has become the key to security. The transfer of sensitive information from technology research and development departments and countries occurs all the time, and the slightest error is not allowed, which also makes optical encryption transmission technology mo...

Claims

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Application Information

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IPC IPC(8): G06T1/00G06F21/60
CPCG06T1/0021G06F21/602
Inventor 张雷洪徐润初赖纯莉康祎张志晟韩文峰叶华龙袁晓熊锐王朝锐
Owner UNIV OF SHANGHAI FOR SCI & TECH
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