Blockchain is a database of timestamped blocks. Blockchains are always transactional databases and the transactions are irreversible. There is not one central agency responsible for the database. It removes intermediaries and creates trust in the data. In her talk at the Blockchain Forum, Elena Karafiloski demystifies blockchain and presents the use cases Health Information Traceability (HIT), a blockchain-based online marketplace for personal health data and Attainr, a blockchain-based education credentials platform.
Learn more in her presentation on Slideshare: