Quantum-Safe Hybrid Cryptographic Framework for Multimedia Application
摘要
With the rapid expansion of digital communication and multimedia applications, a vast amount of visual data is continuously generated and transmitted through interconnected networks of cameras, sensors, processing nodes, and satellites. This data, often sensitive and long-archived, is increasingly vulnerable to future quantum-enabled adversaries. Classical cryptographic protocols, currently used to protect this multimedia data, are susceptible to “Harvest Now, Decrypt Later” (HNDL) attacks, particularly as quantum computing matures. These threats are further amplified by side-channel attacks, which can compromise even post-quantum cryptographic (PQC) implementations if not adequately secured. This paper discusses quantum threats and proposes a quantum-resilient framework designed to secure visual data, incorporating both classical and PQC algorithms. The proposed Hybrid Key Encapsulation Mechanism (KEM) combines elliptic curve cryptography (ECC) and lattice-based Kyber-768. By offloading cryptographic operations to edge servers and utilising secure key lifecycle management, the framework addresses challenges in performance, scalability, and compatibility, enhancing its suitability for protecting visual data against emerging quantum threats.