Optical image encryption method based on angular multiplexing volume holography and fingerprint recognition

Abstract

The present invention provides an optical image encryption method based on angular multiplexing volume holography and fingerprint recognition, an information storage method and information storage equipment. The optical image encryption method based on angular multiplexing volume holography and fingerprint recognition comprises the steps of: generating a plurality of volume holograms sequentially rotating at an angle alpha on the basis of fingerprint images of a plurality of users and corresponding image records to be encrypted thereof by utilizing angular multiplexing characteristic of volume holography, thereby achieving high-security encrypted storage and recognition of multi-user data; and recording volume holograms of the encrypted images in a volume holographic storage medium by adopting a random binary phase encryption method for fingerprint information of the users and corresponding images to be encrypted. The optical image encryption method conducts random binary phase encryption on optical images to be encrypted by utilizing the angular multiplexing characteristic of volume holography, and stores images and information needed to be stored of clients in the volume holographic storage medium.

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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