What Is Blockchain Technology? Author: @nkit Blockchain technology is the digital system that makes cryptocurrencies like Bitcoin and Ethereum work. In simple terms, blockchain is a type of digital database that stores information in a secure, transparent, and decentralized way. Unlike traditional systems that rely on a central authority (like a bank), blockchain uses a network of computers to record and verify data. How Blockchain Works Blockchain stores data in units called blocks . Each block contains a list of transactions or information. Once a block is filled with data, it is linked to the previous block, forming a chain — hence the name blockchain . Each block contains a unique code called a hash , and it also contains the hash of the block before it. This linking makes the chain extremely difficult to change without altering every block that comes after it. Decentralization — What It Means In traditional systems, a central au...