Optical encryption with protection against Dirac delta and plain signal attacks

Area of Science:

• Optics and Photonics
• Information Security
• Applied Mathematics

Background:

• Conventional optical encryption methods, like double random phase encoding (DRPE), are vulnerable to specific attacks.
• Existing techniques lack robustness, limiting their practical application in secure data transmission.

Purpose of the Study:

• To propose a novel optical encryption technique enhancing security and robustness.
• To address the vulnerabilities of conventional optical encryption methods.

Main Methods:

• The proposed method utilizes modular arithmetic and time-varying noise components for information disguise.
• Demonstrated using the double random phase encoding (DRPE) framework.
• Employs spatial light modulators for generating noise-like image data.

Main Results:

• The technique produces a nondeterministic system response, enhancing security.
• Achieves robustness against Dirac signal and plain signal attacks, which plague conventional DRPE.
• Validates the method's effectiveness for secure optical encryption.

Conclusions:

• The proposed optical encryption technique offers a significant improvement in security and robustness.
• This method can be extended to other optical encryption techniques beyond DRPE.
• Enables the practical use of optical DRPE for secure encryption applications.