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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Security enhanced optical encryption system by random phase key and permutation key.

Mingzhao He¹, Qiaofeng Tan, Liangcai Cao

¹State Key Laboratory of Precision Measurement Technology and Instruments, Tsinghua University, Beijing, 100084, China. hemz05@mails.tsinghua.edu.cn

|January 7, 2010

Summary

This summary is machine-generated.

This study introduces a novel optical encryption system that enhances security by hiding secret information through watermarking. The new method improves invisibility, nonlinearity, and resistance to attacks compared to conventional methods.

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Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

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Published on: May 30, 2014

Area of Science:

Optics and Photonics
Information Security
Cryptography

Background:

Conventional double random phase encoding (DRPE) produces noticeable ciphertext, potentially attracting eavesdroppers.
DRPE systems have been shown to be vulnerable to various cryptanalytic attacks.

Purpose of the Study:

To propose a security-enhanced optical encryption system that conceals the existence of secret information.
To improve the invisibility, nonlinearity, and resistance to attacks of optical encryption systems.

Main Methods:

Encryption of plaintext using iterative fractional Fourier transform with a random phase key.
Random permutation of ciphertext with a permutation key before watermarking.
Cryptanalysis to evaluate system linearity and resistance to attacks.

Main Results:

The proposed system breaks the linearity of conventional DRPE.
The permutation key effectively prevents attackers from accessing ciphertext in various attack scenarios.
Simulations demonstrate the system's effectiveness and enhanced security strength.

Conclusions:

The developed optical encryption system offers superior security through watermarking and permutation.
The system provides enhanced invisibility, nonlinearity, and robustness against cryptanalysis.
This approach represents a significant advancement in secure optical information hiding.