Artificial intelligence has become a hot topic in the realm of optical encryption, especially when leveraging optical scattering. Traditional scattering media, however, have their limitations, often susceptible to instability and perturbations, making them less than ideal for long-term use. Moreover, the one-to-one mapping between input and output poses a security risk, leading to potential plaintext compromise.
To address these challenges, a stable spin-multiplexing disordered metasurface (DM) has been introduced as the scattering medium. This cutting-edge approach offers numerous polarized transmission channels, enhancing security by implementing a double-secure procedure that establishes a two-to-one mapping between input and output. In terms of decryption efficiency and longevity, this innovative system boasts significant advantages even in noisy environments.
When light passes through scattering media like ground glass, it undergoes multiple scattering processes, resulting in the formation of speckles – visually observed as alternating dark and bright grains. While this randomness may appear chaotic, it actually follows a deterministic transformation dictated by the scattering medium, bridging the input information and the speckle pattern. Exploiting speckles for information encryption has gained traction in recent years, with strategies like wavefront shaping and speckle correlation proving effective.
Deep learning has emerged as a powerful tool in deciphering information concealed within speckles, ranging from intricate data to human faces. The use of a spin-multiplexing DM with random phase profiles and a double-secure procedure elevates the security of optical encryption, offering enhanced protection against potential breaches. The DM’s stability and large memory effect make it a superior alternative to conventional scattering media, enabling superior performance and security in optical encryption applications.
In conclusion, the integration of artificial intelligence, spin-multiplexing DMs, and double-secure procedures represents a game-changer in the field of optical encryption. By harnessing the power of advanced technologies, this high-security learning-based optical encryption system paves the way for a new era of secure communication and data protection.
