Joint Crypto-Blockchain Scheme for Trust-Enabled CCTV Videos Sharing

The declaration of COVID-19 as pandemic affected almost all public and private functionaries by enforcing them to operate remotely, and the judiciary is no exception. The trend seems to continue for the foreseeable future. The judicial proceedings where a piece of evidence, particularly the digital one, holds undisputed importance. Its preservation and intact transmission to the jury have gained an enhanced significance in this era which is highly susceptible to manipulation. This research proposes joint encryption and blockchain-based solution for immutable decentralised evidence management for CCTV footage. The permissioned chain of evidence system is implemented using Hyperledger Fabric to ensure the validity of the video metadata. The hash values are calculated on videos (recorded per session) and stored in the blockchain, while Region of Interest (ROI) based selective encryption of videos adds optimized security to individuals' privacy and protects from illegal access of stored videos. The experimental results provide a proof of concept that the proposed scheme facilitates the remote court services by maintaining a legal chain of evidence for CCTV videos.