Bitcoin security guarantee shattered by anonymous miner with 51% network power

http://cdn.arstechnica.net/wp-content/uploads/2013/11/trading-place-bitcoin.jpg

For the first time in Bitcoin’s five-year history, a single entity has repeatedly provided more than half of the total computational power required to mine new digital coins, in some cases for sustained periods of time. It’s an event that, if it persists, signals the end of the crypto currency’s decentralized structure.

Read more: Bitcoin security guarantee shattered by anonymous miner with 51% network power

Story added 16. June 2014, content source with full text you can find at link above.