The principle behind Blockchain technology is to create a decentralized and immutable ledger that records transactions transparently. Each transaction is grouped into a block, which is linked to the previous block, forming a secure chain. This decentralized structure ensures that no single entity has control over the entire network, enhancing security and trust among users. Additionally, the use of cryptographic techniques guarantees data integrity, making blockchain a fundamental technology for digital currencies, smart contracts, and various applications across industries.