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Draper-Backed Exchange in Lockdown Following ‘Sophisticated’ Attack

Coinhako, a cryptocurrency exchange backed by Tim Draper, has restricted user withdrawals after falling victim to a "sophisticated attack."The Singapore-based exchange told users Friday that account send functions for cryptocurrencies had been temporarily disabled. Although a spokesperson initially said this was for "network maintenance", the exchange admitted Saturday it had

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Crypto Researcher Hasu Flags Attack That Could Bring ‘Purge’-Style Mayhem to Bitcoin

Pseudonymous researcher Hasu has discovered a new twist on a well-known potential attack on the bitcoin network.The researcher posted a description of the attack, which he named "Purge" after the B-movie franchise, to the bitcoin developer email list last week. It's a variation on the so-called sabotage attack, in which

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Why Harvard Research on a Low-Profit Tezos Attack Matters for Proof-of-Stake

A recent academic study says Tezos is threatened by "selfish mining," providing a valid threat model for other live and up-and-coming proof-of-stake (PoS) cryptocurrencies.That’s the finding from Selfish Behavior in the Tezos Proof-of-Stake Protocol, published last November by then-Harvard researcher and current Google engineering intern Michael Neuder.The paper from Neuder

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Ethereum Network Overcomes Malicious New Year’s Eve Attack

The Ethereum Network was the target of a coordinated attack in recent days, affecting client platform Parity, which threatened to cause significant downtime. Malicious Attack to Undermine Ethereum Network The attack began on December 30 when invalid blocks were sent to the network, which caused node operators using the Parity client, which

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