Bitcoin Under Attack: Coinkite Reports Malleability Attack & Urges Caution
Coinkite, a bitcoin platform that transacts more than 400,000 BTC per month, has reported a bitcoin malleability attack that requires users to be careful about zero confirmation receipts since there are two versions of a transaction (low S high S). Coinkite is requiring one confirmation for deposits before it uses them in a new transaction. Transactions have been modified and rebroadcast with new transaction numbers, indicating a malleability attack. The attacks have occurred over the last 24 to 48 hours. Almost all transactions on the network have suffered the attacks. Customer Funds Not....
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For the past several days*, the Bitcoin network has been plagued by a so-called "transaction malleability attack." Bitcoin users have experienced a number of annoyances, causing confusion and frustration. And while the transaction malleability issue is well-known and has plagued the Bitcoin network before, to many it is still unclear what it is, why it is a problem, who is causing the attack right now, and what can be done about it. *According to the claimed attacker (see below), the attack is currently paused at the time of writing, but could and probably will be continued at any time.....
The Bitcoin Network Under Attack. If you are involved in the Bitcoin ecosystem at all, in the last 72 hours you have been exposed to the phrase "transaction malleability." It's what Mt Gox blamed when it enacted a sudden and prolonged halting of all withdrawals, and it's the vehicle for what has been called a "massive and concerted attack" on various bitcoin exchanges. Transaction malleability had also been a known characteristic of the Bitcoin protocol for a while, as pointed out by many in the community when Mt Gox cited it as a security liability. Despite all of this tumult within the....
Over the past 72 hours, the Bitcoin protocol has been suffering from a malleability attack. The attack has been happening to quite a few users moving funds on the network. The transactions look like bitcoin being sent twice or “double spent.” Typically the real action gets confirmed by the network, and the misleading output disappears on most wallets. The attack has been said to be safe but rather a “nuisance”. Over the past couple of months, the network has had similar malleability or spam attacks hitting the network and affecting confirmations. The cryptocurrency community has been aware....
For the past several years, the Bitcoin network has been bedeviled by transaction malleability attacks. These attacks shot to fame during the notorious Mt. Gox theft where it was referred as the sole reason for interrupting withdrawals. Since then, the attack has distressed many digital currency companies, including high-volumed exchanges BitStamp and BTC-e. What is the Transaction Malleability? While transaction malleability is still a little difficult to explain in plain English, we can consider it as an attack that tampers the unique Bitcoin transaction ID before it is confirmed by....
Dark market web site Silk Road 2 has told customers that all of their bitcoins are gone after a massive hack, in which at least 4,476 bitcoins (worth over $2.6m at current prices) are believed stolen. Organizers at the site are blaming the compromise on the transaction malleability attack in the news this week. "Our initial investigations indicate that a vendor exploited a recently discovered vulnerability in the Bitcoin protocol known as "transaction malleability" to repeatedly withdraw coins from our system until it was completely empty," said a post from Defcon, one of the site's....