Optical Image Encryption Method Based on Angle Multiplexing Volume Holography and Fingerprint Recognition

Abstract

The present invention provides an optical image encryption method, information storage method and device based on angle multiplexing volume holography and fingerprint identification, using the angle multiplexing characteristic of volume holography to convert fingerprint images of multiple users and their corresponding images to be encrypted Record and generate multiple volume holograms with rotation angle α in turn, so as to realize high-security encrypted storage and identification of multi-user data; user fingerprint information and its corresponding image to be encrypted, through the random binary phase encryption method, in the volume hologram A volume hologram of the encrypted image is recorded in the storage medium. The present invention utilizes the angle multiplexing characteristic of the volume holography to perform random binary phase encryption on the optical image to be encrypted, and stores the images and information required by the customer in the volume holography storage medium well.

Description

technical field [0001] The invention relates to an information encryption method for high-security encrypted storage and identification of multi-user data, in particular to an optical image encryption method based on angle multiplexing volume holography and fingerprint identification. Background technique [0002] With the advent of the information age, information as an important resource has been paid more and more attention. But at the same time, problems such as information theft and leakage continue to emerge, and information security has become an increasingly 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] In recent years, using optical information processing technology to encrypt images and ensure information security has a...

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Problems solved by technology

[0004] However, digital holographic technology uses photoelectric devices such as CCD to replace the traditional holographic dry plate and reproduces it by computer, so the receiving field of view is limited and the response speed is slow.

Moreover, studies have shown that since random phase encoding is a public key, simple use of double random phase encryption is vulnerable to attacks and reduces security

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