Learn Blockchain: Bitcoin, Ethereum and Hyperledger Fabric

Explains why blockchain matters by examining business challenges—trust gaps, transparency shortfalls, middlemen, and manual processes—and shows how distributed ledgers enable trust without intermediaries and automate workflows.

Explore how distributed and decentralized systems enable a resilient peer-to-peer network with thousands of nodes, offering high availability, transparency, trust, and cost savings by removing middlemen.

Blockchain is a peer-to-peer, distributed ledger that stores transactions in linked blocks, is append-only and immutable, and is updated only by consensus among parties, with public or private variants.

Initiate a blockchain transaction by sending from one address to another and attaching a transaction fee. Miners validate and broadcast the block across the network, driven by consensus and proof-of-stake.

Learn how public and private keys secure information in cryptography, with the public key used to encrypt and the private key to decrypt, and private keys kept secret for signing.

Explain the drawbacks of proof of work, including energy consumption, mining pools and 51 percent attacks, and introduce the shift toward proof of stake.

Discover how miners set bitcoin transaction fees based on transaction size and weight, and how those fees influence blockchain confirmation speed.

Explore how the Bitcoin blockchain explorer shows blocks, hashes, and mining in a public blockchain. Learn to inspect transactions, coinbase rewards, and address activity using the explorer site.