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Binary channel multiple fingerprints optical encryption method

An encryption method, multi-fingerprint technology, applied in the direction of acquiring/organizing fingerprints/palmprints, instruments, characters and pattern recognition, etc., can solve the problems of difficult information recording, low security, difficult key management and use, etc. Key management, easy portability, and high security

Active Publication Date: 2016-07-27
SHANGHAI NORMAL UNIVERSITY
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AI Technical Summary

Problems solved by technology

However, the key data volume of any random phase matrix is ​​large, the processing speed of information is slow, and the management and use of keys are difficult
The encryption result of the double random phase encryption system is a complex amplitude distribution, which contains amplitude information and phase information, which makes the information recording very difficult
Moreover, the double random phase encoding is a public key, and the security of simply using double random phase encryption is low, and it is easy to be attacked

Method used

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  • Binary channel multiple fingerprints optical encryption method
  • Binary channel multiple fingerprints optical encryption method
  • Binary channel multiple fingerprints optical encryption method

Examples

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Embodiment 1

[0050] Encrypt the image composed of 8 circular holes arranged symmetrically for a week, the image is as follows figure 2 As shown in a, the size of the circumference of the image is Φ10mm, the wavelength of the laser light emitted by the laser is 0.6328μm, and the fingerprint image F used by the left channel encryption key 15 1 (x,y) such as figure 2 As shown in b, the size of the fingerprint image is about 10mm×12mm, and the random phase function is exp[j2πM 1 (x,y)], M 1 (x,y) is a random number in [0,1]. Fingerprint image F for right channel encryption key 18 2 (x,y) such as figure 2 As shown in c, the size of the fingerprint image is about 9mm×13mm; the random phase function is exp[j2πM 2 (x,y)], M 2 (x, y) is a random number of [0,1], the focal length of the Fourier transform lens 110 is 300mm, and the encryption distance is 500mm, and the encrypted image of the target is as image 3 As shown in a, from image 3 As can be seen in a, the original image of the t...

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Abstract

The invention provides a binary channel multiple fingerprints optical encryption method comprising an encryption process and a deciphering process. A laser beam generator emits linearly polarized lights which are divided by a beam splitter into transmitting light and reflecting light. The transmitting light arrives to a left channel encryption key with fingerprint images and generates left channel modulated lasers. The reflecting light arrives to the right channel encryption key with fingerprint images and generates right channel modulated lasers. Recognizing the non-duplication characteristic of a biosignature, the invention integrates biological feature identification technologies with optical information processing technologies and provides such a binary channel multiple fingerprints optical encryption method, which is highly reliable and secure for encryption key management and is convenient for people to carry around. The method has a good application prospect in the information safety field.

Description

technical field [0001] The invention belongs to the technical field of optical image encryption, and relates to an optical encryption method, in particular to a fingerprint encryption method based on human biological characteristics, that is, a dual-channel multi-fingerprint optical encryption method. Background technique [0002] With the advent of the information age, information as an important resource has been paid more and more attention. However, problems such as information theft and information leakage continue to emerge, and information security has an important impact on national security and economic and social development, and has increasingly become a prominent problem that needs to be solved. Moreover, with the rapid development of society and economy, the amount of encrypted information or documents is constantly increasing, and the storage and extraction of massive encrypted information has become an urgent problem to be solved. [0003] Information encrypt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K9/00
CPCG06V40/1318G06V40/50G06V40/53
Inventor 闫爱民
Owner SHANGHAI NORMAL UNIVERSITY
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