What is Blockchain: a Gentle Introduction [pdf]
This paper provides a gentle introduction to blockchain technology, explaining its core concepts, how it works as a distributed ledger, and its key characteristics such as decentralization, immutability, and transparency.
Background
- Blockchains are distributed digital ledgers that record transactions across a network of computers, making the records difficult to alter retroactively without consensus from the network.
- The technology first gained prominence as the underlying infrastructure for Bitcoin (launched in 2009 by the pseudonymous Satoshi Nakamoto), but has since been explored for applications beyond cryptocurrency — including supply chain tracking, digital identity, and smart contracts.
- This paper is from late 2016, a time when blockchain hype was accelerating but mainstream understanding was still shallow. It aims to explain the core concepts without requiring a computer science background.
- Key terms it likely covers: blocks (bundles of transactions), chains (cryptographic linking of blocks), distributed consensus (how participants agree on the ledger's state without a central authority), and mining (the process of validating new blocks).