This book explores the potential of blockchain technology to revolutionize the way we live our lives. It examines how blockchain technology can be used to create secure, transparent, and efficient systems for a variety of applications, from banking and finance to healthcare and government.
A blockchain is a distributed ledger with growing lists of records (blocks) that are securely linked together via cryptographic hashes. Each block contains a cryptographic hash of the previous block, a timestamp, and transaction data. Since each block contains information about the previous block, they effectively form a chain, with each additional block linking to the ones before it. Consequently, blockchain transactions are resistant to alteration because, once recorded, the data in any given block cannot be changed retroactively without altering all subsequent blocks and obtaining network consensus to accept these changes.