There are not many occasions when one can give an unqualified thumbs-up to something the government does, but this is one such occasion. Last week, Sir Mark Walport, the government’s chief scientific adviser, published a report with the forbidding title Distributed Ledger Technology: Beyond Block Chain. The report sets out the findings of an official study that explores how the aforementioned technology “can revolutionise services, both in government and the private sector”. Since this is the kind of talk one normally hears from loopy startup founders pitching to venture capitalists rather than from sober Whitehall mandarins, it made this columnist choke on his muesli – especially given that, in so far as Joe Public thinks about distributed ledgers at all, it is in the context of Bitcoin, money laundering and online drug dealing. So what, one is tempted to ask, has the chief scientific adviser been smoking?
Before we get to that, however, some background might be useful. A distributed ledger is a special kind of database that is spread across multiple sites, countries or institutions, and is typically public in the sense that anyone can view it. Entries in the database are configured in “blocks” which are then chained together using digital, cryptographic signatures – hence the term blockchain, which is really just a techie name for a distributed ledger that can be shared and corroborated by anyone who has the appropriate permissions.
Read more:
http://www.theguardian.com/commentisfree/2016/jan/24/blockchain-bitcoin-technology-most-important-tech-invention-of-our-age-sir-mark-walport 
Bitcoin will be the Financial invention of this century 
