The role of blockchain in securing financial transactions is rooted in its ability to provide a transparent and immutable ledger. Each transaction recorded is linked via cryptographic hashes, making it nearly impossible to alter past records without detection. This decentralization reduces the risk of fraud and enhances trust among participants in the financial ecosystem. Blockchain also enables faster transaction processing, minimizes costs by eliminating intermediaries, and provides a clear audit trail. Its inherent security features make it particularly valuable for industries requiring high levels of trust, such as finance.