Two of the largest bitcoin-using online black marketplaces, Silk Road 2.0 and Agora, have spent most of the last week fending off “very sophisticated” distributed denial-of-service (DDoS) attacks by an unknown entity. In both cases, the attacks have resulted in service interruptions, with both sites currently offline. Both marketplaces already use highly advanced security measures, […]

Earlier this week, citing the massive DDoS attack on Bitcoin infrastructure, Bitstamp halted all withdrawals from customer accounts. That freeze on customer accounts appears to be ending, as Bitstamp recently announced via Twitter and their website that they’ll be resuming withdrawal processing later today. Speaking with CoinDesk, Bitstamp CEO Nejc Kodrič says his team has […]

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 […]

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, […]