Metasurface‐Assisted Chaotic Cryptography Platform for Enhanced Secure Communication

Abstract Metasurfaces provide a cutting‐edge platform for wireless communications owing to their ability to precisely tailor electromagnetic (EM) waves. Nevertheless, existing wireless communication systems remain vulnerable to brute‐force attacks, and achieving both high‐security and large‐capacity communications within practical architectures remains a formidable challenge. Here, a metasurface‐assisted high‐security cryptographic platform leverages chaotic encryption algorithm to address these limitations is proposed. The metasurface, operating as a scattering medium, encodes the cipher image and secure keys across multiple dimensions, including distinct frequencies, polarization states, and spatial distances, through separated amplitude and phase channels. Crucially, by exploiting the inherent unpredictability of chaotic dynamics, the security of encrypted scheme is significantly improved. Evaluations of potential attacks demonstrate that successful decryption requires the precise reconstruction of cipher images, as well as the simultaneous acquisition of two chaotic keys and one incident polarization key, thereby substantially raising the barrier against unauthorized access. By synergizing the chaotic encryption algorithm with physical‐layer EM parameter keys, the metasurface‐assisted system establishes a robust framework for future high‐security wireless communications and large‐scale data storage applications, paving the way for secure and efficient information transfer in next‐generation networks.