IBM Think Academy: Blockchain, How it works

What is Blockchain? Blockchain is a shared, immutable ledger for recording the history of transactions. It fosters a new generation of transactional applications that establish trust, accountability and transparency—from contracts to deeds to payments.

Frees up capital flows, speeds up processes, lowers transaction costs and most importantly provides security and trust. We believe that Blockchain will do for business what the Internet did for communications.

Source: IBM Blockchain