Optical encryption method based on chaos and computer-generated holography

Abstract

Provided is an optical encryption method based on chaos and computer-generated holography. By means of the method, a chaos sequence is successfully used for forming a random phase array to carry out modulation coding on object light waves, the boqi coding method which revises off-axis reference light is used, and optical encryption and decryption are achieved on the basis of computer-generated holography. The invention belongs to the technical field of information security. In the decryption process, by means of the method, as long as correct chaos sequence initial values are obtained, the random phase array can be obtained, and therefore clear initial images can be rebuilt combining correct system architecture parameters. Compared with a conventional random phase encryption method, the chaos sequence initial values are used as secret keys, and therefore difficulty of phase array storage and transmission does not exist any longer, data bulk of the secret keys is greatly compressed, and meanwhile, digitization of computer-generated holography technology encryption information is more beneficial for storage and transmission of information.

Description

technical field [0001] The invention belongs to the technical field of information security, and in particular relates to an optical encryption method based on chaos and computational holography. Background technique [0002] Since the 1990s, with the development of computer hardware and software and the emergence of the Internet, people have been brought into the information society, and information technology has developed rapidly. Information security issues such as data encryption, anti-counterfeiting and security authentication are becoming more and more important. While computer and electronic information encryption technology has been widely used, due to the particularity of optical imaging systems, light waves are a multi-dimensional information carrier with multiple encoding properties such as amplitude, phase, spatial frequency, and polarization. Research on optical encryption technology also developed rapidly. In addition, optical and photoelectric information e...

AI Technical Summary

Problems solved by technology

However, using traditional encoding methods such as random phases, the encrypted data generated is often a complex number. It is difficult to transmit through the network when recording and storing using traditional recording holograms, and the amount of key data is very large.

At the same time, if there is no digital processing or conversion in the end, the information must be reproduced optically, so it is difficult to realize real-time transmission and remote display on the Internet

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