Unique Key-Based Secured Transmission Protocol for Rolling Shutter Visible Light Communications

In this letter, we propose a novel secure transmission protocol for rolling shutter visible light communication (RS-VLC) that leverages unique cryptographic key generation through linear feedback shift registers and bad pixel (BP) mapping. This method ensures data integrity and confidentiality by dynamically encoding data based on device-specific BP maps. Our results demonstrate a substantial improvement in bit error rate performance while reducing the complexity of key generation, encryption, and decryption to the order of
$N$
, where
$N$
is the number of bits in the key. The lower computational complexity of the proposed protocol makes it suitable for low-power internet-of-things devices and mobile applications. We also provide a comparative analysis with existing cryptographic schemes, demonstrating the enhanced security and lightweight nature of the proposed approach.