The technology that uses blockchain for secure data transactions is known as distributed ledger technology (DLT). Blockchain operates on a decentralized network, ensuring that data is immutable and transparent. Each transaction is recorded in a block, linked to previous blocks, forming a secure chain that resists tampering. This technology is commonly associated with cryptocurrencies like Bitcoin but has broader applications in supply chain management, healthcare, and identity verification. By enhancing security and trust, blockchain technology revolutionizes transactional integrity across various sectors.