Multi-key hybrid encryption optical codebook based on five-dimensional Hamiltonian conservative chaotic system

With the advent of big data and supercomputing, traditional codebook methods face challenges in information capacity and security. To overcome these limitations and resist brute-force attacks, a computational holographic optical codebook is proposed based on a five-dimensional Hamiltonian conservative chaotic system (FHCCS) with optical key mixing encryption. Chaotic sequences generated by multiple keys encrypt both the codebook and ciphertext, creating a nearly unbreakable key space. The codebook was created using computer generated holography (CGH), where chaotic randomly generated optical keys are used with chaotic keys for hybrid encryption. This approach enhances security while preserving the advantages of optical encryption. Theoretical and experimental results demonstrate that the proposed optical codebook offers high security, large capacity, fast decryption, and strong resistance to brute-force attacks, demonstrating considerable practical value.