Chosen-plaintext attack on the double random polarization encryption.

Area of Science:

• Optics and Photonics
• Information Security
• Cryptography

Background:

• Optical encryption methods utilize random encoding in light field properties like phase, polarization, or coherence.
• Rigorous cryptanalysis is crucial for validating the security of these optical encryption techniques.
• Phase-encoding encryption is the only method that has undergone comprehensive security analysis thus far.

Purpose of the Study:

• To investigate the security vulnerabilities of double random polarization encryption (DRPolE).
• To determine if DRPolE is susceptible to chosen-plaintext attacks (CPA).
• To assess the feasibility of retrieving encryption keys using CPA against DRPolE.

Main Methods:

• The study employed a chosen-plaintext attack (CPA) methodology.
• Researchers analyzed the relationship between chosen polarization states of plaintext images and their corresponding ciphertext images.
• Key retrieval algorithms were developed and tested based on the collected data.

Main Results:

• The double random polarization encryption (DRPolE) method was found to be vulnerable to chosen-plaintext attacks (CPA).
• Successful retrieval of encryption keys was demonstrated when specific polarization states of plaintext images were chosen and their ciphertexts acquired.
• This highlights a significant security flaw in the DRPolE technique.

Conclusions:

• The DRPolE method presents a security concern due to its susceptibility to CPA.
• The findings necessitate a re-evaluation and enhancement of polarization-based optical encryption designs.
• Future research should focus on developing more robust polarization encryption schemes resistant to known cryptanalytic methods.