Enhancing Maritime Communication Security with Blockchain Technology

Blockchain technology, fundamentally characterised by decentralisation, immutability, and consensus mechanisms, revolutionises data management and communication security. Unlike traditional centralised databases controlled by a single authority, blockchain distributes data across a network of nodes in a peer-to-peer framework, enhancing security by eliminating single points of failure. Immutability ensures that once data are recorded, they cannot be altered due to cryptographic hashing, where the hash of each block depends on its content, making tampering evident. Real-world applications include secure cargo tracking, identity management, and smart contracts. Blockchain enables real-time tracking of cargo, verified digital identities, and self-executing contracts that automate processes such as ownership verification and payment settlements. This article explores the potential of blockchain to fortify maritime communication security. Suggestion for a secure communication structure in shipping is presented, as well as a blockchain algorithm in Python for secure application onboard. For practical implementation, a blockchain-based document workflow management system can be developed to manage critical maritime documents.