Blockchain technology backs up Bitcoin, but there is huge interest in the financial world in making distributed ledger technology work for them. The blockchain is now being hyped as the solution to inefficient information processing systems or where immutable record keeping is needed. However most people do not understand how the technology works, how secure it really is, how it might be applied to real world applications, or what potential problems there are with the technology. Come to this session and get an overview on blockchain security.