A Unique Combined Multikey Cryptography Method for Multimedia Transmission

The expansion of digital communication has made data transmission a cornerstone of modern applications such as telemedicine, multimedia streaming, and surveillance.Despite its importance, securing video communication remains a major concern in the face of cyberattacks, unauthorized access, and frequent data breaches.Conventional encryption schemes like AES and RSA have long been employed for safeguarding video content, but they often introduce high computational demands, complex key management, and limited resilience against emerging quantum-based attacks.To overcome these limitations, this study introduces a Hybrid Multi-Key Cryptography framework that incorporates Elliptic Curve Cryptography (ECC) to strengthen security while improving efficiency.forenhanced security and efficiency in video transmission.The encryption process begins with video segmentation, where the original video is divided into frames and blocks.Each block undergoes a dual-layer encryption mechanism, incorporating ECC-based key exchange and a lightweight symmetric encryption scheme.The ECC-based approach is used for key management and distribution, ensuring secure key exchange between sender and receiver.The symmetric encryption algorithm is then employed for fast and efficient encryption of video frames.By dynamically changing the encryption keys at different time intervals, the proposed technique prevents cryptanalysis attacks and enhances confidentiality.