Blockchain technology was first conceptualized in 2008 by an anonymous person or group known as Satoshi Nakamoto, who introduced it as the underlying technology for Bitcoin, the first cryptocurrency. Initially designed to facilitate secure and transparent peer-to-peer transactions without the need for a central authority, blockchain technology soon gained recognition for its broader applications beyond cryptocurrencies. The key innovation of blockchain lies in its distributed ledger system, where transactions are recorded across a network of computers (or nodes), making it highly resistant to tampering or fraud. Over time, blockchain has evolved from its roots in Bitcoin to support various other cryptocurrencies and decentralized applications (DApps). This evolution includes the development of smart contracts, introduced by Ethereum in 2015, which enable automated and self-executing agreements. Today, blockchain is being explored in various industries such as finance, supply chain management, healthcare, and even voting systems, as it continues to offer new possibilities for secure, transparent, and decentralized digital interactions.