What is Blockchain ? Blockchain is a decentralized, distributed digital ledger technology that is used to record transactions and store data in a secure and transparent manner. It was first introduced in 2008 as a part of the Bitcoin cryptocurrency and has since been adopted by a variety of industries, including finance, healthcare, logistics, and more. At its core, a blockchain is made up of a network of nodes that work together to validate and record transactions. Each block in the chain co...