At last year’s South by Southwest gathering, regarded as the place where the hip technology companies show up, Bitcoin was still such an under(...)

Yesterday, Slovenia-based Bitstamp became the second major bitcoin exchange to halt customer withdrawals in the past several days, citing “inconsistent results”, and blaming a denial-of-service attack. Photograph: Tomohiro Ohsumi/Bloomberg

Bitcoin is being hit by attacks from unknown computer hackers who are sending “mutated” lines of code into the program that runs the virtual c(...)