The quicker blocks also cut the risk of double spending attacks. (coinstocks.com)
But as the system has grown in power and as it continues to grow, a double spend attack becomes more and more difficult, and less and less profitable. (calvinayre.com)
At 2:30 this morning @petertoddbtc committed a double - spend attack on @Coinbase by buying me Reddit gold and then redirected the payment» (bitcoinist.com)