Thanks to a prolonged distributed denial-of-service attack, Bitcoin exchange Bitstamp suspended withdrawals late Tuesday. The world’s third-largest Bitcoin exchange joins the long-troubled MtGox exchange in the fallout over the “transaction malleability” bug in the Bitcoin code. Speaking with Bloomberg News, Blockchain.info’s chief security officer Andreas Antonopoulos characterized the DDoS attacks as “a nuisance” aimed at […]

Benjamin Lawsky, superintendent of New York’s Department of Financial Services, gave details of his agency’s regulatory plan for Bitcoin transactions in the state. Speaking at the Future Tense conference in Washington, DC, Lawsky outlined the creation of a “BitLicense” for businesses using cryptocurrencies, making New York the first U.S. state to regulate the currency. “Our […]

In a report released yesterday, J.P. Morgan’s head of foreign exchange strategy, John Normand, expressed a deeply critical view of Bitcoin and other digital currencies. The eight-page report examined the “risks and opportunities” of investment in cryptocurrencies, citing many significant concerns for large-scale bank investment. In particular, Normand believes that Bitcoin is “vastly inferior to […]

Following an already rough week of falling prices, Forbes reports that Bitcoin suffered another blow yesterday after the detection of a “massive and concerted” distributed denial of service (DDoS) attack on the block chain and related software. The attack focuses on a vulnerability known as “transaction malleability,” which allows records of transactions to be changed, […]