Optics-based system for robust and reliable encryption

R. Yuvarani, R Mahaveerakannan

This research study provides a novel method that uses a strong polar coding scheme to improve the security, scalability, and reliability of Network-Oriented Cloud Control Systems (NOCCS). The technique combines OFDM-AON with internal chaos-based encryption using simplified versions of the 3-D chaos system. At a bit error rate (BER) of $10^{\wedge}-3$, experimental results show a 2.5 dB sensitivity enhancement, offering robust protection against unauthorized devices trying brute-force attacks. The suggested polar encoding for chaotic encryption based on QAM-OFDM is deemed a viable solution for NOCCS data transmission, offering robust protection against differential and brute-force attacks, while simultaneously improving BER, security, and reliability.

吴克难 Wu Kenan, 胡家升 Hu Jiasheng, 乌旭 Wu Xu

Xinshun Zhao, Ying Xu, ShuQin Lin +6 more

The rapid globalization of the digital ecosystem has elevated information security to a critical concern in modern society. Optical encryption offers an effective approach for enhancing information protection; however, existing optical encryption strategies are unable to reliably recover encrypted information following free-space transmission. To address this challenge, we propose a novel protocol named the optical coherence engineering encryption protocol (OCE-Encryption Protocol). By jointly manipulating the optical coherence structure and introducing astigmatic phase modulation, the protocol generates a spectral intensity ciphertext capable of secure free-space transmission. At the receiver, the original information can be accurately reconstructed by measuring the optical coherence structure of the received ciphertext and applying the correct decryption key. Furthermore, the proposed protocol demonstrates strong resilience to transmission channel disturbances. We hope that optical coherence engineering can expand the functional boundaries of existing optical encryption protocols and provide a pathway toward next-generation secure optical communication systems.

Madison Durrance, Zach Galberd, Abbey Savage +2 more

Inbarasan Muniraj, John T. Sheridan

Yu Feng Shao, Haiqi Gao, Jiaming Liang +6 more

Optical encryption inherently provides strong security advantages, with hybrid optoelectronic systems offering additional degrees of freedom by integrating optical and algorithmic domains. However, existing optical encryption schemes heavily rely on electronic computation, limiting overall efficiency, and the physical keys are susceptible to damage, compromising both security and system stability. To overcome these challenges, we introduce the quasi-periodic optical key (Q-POK), which combines long-range order with short-range disorder, enabling enhanced security and robustness against damage within a single platform. By leveraging diffraction symmetry, our design enables optics-driven encryption, effectively shifting the optoelectronic balance toward photonic processing. Moreover, we innovatively apply deep learning to reconstruct the complex optical ciphertext field using only amplitude data and cryptographic keys, simultaneously achieving data compression and improved security. Within this framework, the key space includes continuously tunable parameters such as wavelength, propagation distance, phase modulation, and Q-POK geometry, significantly expanding cryptographic diversity. Our system also demonstrates robust cryptographic reliability by reducing inter-class distances by over 50% and tolerating up to 20% ciphertext loss. Our framework represents a generation of physically grounded, algorithmically enhanced optical cryptosystems—laying a foundational pathway for scalable, hardware-integrated information security paradigms.