[新聞] Bitcoin Gold Hit by Double Spend Attac

看板DigiCurrency (數位貨幣)作者e12518166339 (小肥宅)時間6年前 (2018/05/24 17:21)推噓14(16推 2噓 40→)

留言58則, 11人參與討論串1/1

新聞來源連結： https://www.ccn.com/bitcoin-gold-hit-by-double-spend-attack-exchanges-lose-millions/ 新聞本文： Join our community of 10 000 traders on Hacked.com for just $39 per month. A malicious miner successfully executed a double spend attack on the Bitcoin Gold network last week, making BTG at least the third altcoin to succumb to a network attack during that timespan. Bitcoin Gold director of communications Edward Iskra first warned users about the attack on May 18, explaining that a malicious miner was using the exploit to steal funds from cryptocurrency exchanges. To execute the attack, the miner acquired at least 51 percent of the network’ s total hashpower, which provided them with temporary control of the blockchain. Obtaining this much hashpower is incredibly expensive — even on a smaller network like bitcoin gold — but it can be monetized by using it in tandem with a double spend attack. After gaining control of the network, the attacker began depositing BTG at cryptocurrency exchanges while also attempting to send those same coins to a wallet under their control. Ordinarily, the blockchain would resolve this by including only the first transaction in the block, but the attacker was able to reverse transactions since they had majority control of the network. Consequently, they were able to deposit funds on exchanges and quickly withdraw them again, after which they reversed the initial transaction so that they could send the coins they had originally deposited to another wallet. bitcoin gold Source: BTG Explorer A bitcoin gold address implicated in the attack has received more than 388,200 BTG since May 16 (mostly from transactions it sent to itself). Assuming all of those transactions were associated with the double spend exploit, the attacker could have stolen as much as $18.6 million worth of funds from exchanges. The last transaction was sent on May 18, but the attacker could theoretically attempt to resume it if they still have access to enough hashpower to gain control of the blockchain. Bitcoin gold’s developers advised exchanges to address the attack by increasing the number of confirmations required before they credit deposits to customer accounts. Blockchain data indicates that the attacker successfully reversed transactions as far back as 22 blocks, leading developers to advise raising confirmation requirements to 50 blocks. At present, bitcoin gold ranks as the 26th-largest cryptocurrency, with a circulating market cap of $827 million. Bitcoin gold is at least the third cryptocurrency network hit with a major attack in the past week alone. As CCN reported, a miner manipulated two of privacy coin verge’s five hashing algorithms to maliciously mine more than 35 million XVG — worth ~$1.75 million — in just a few hours. Previously, Japanese cryptocurrency monacoin was hit by an apparent block withholding attack after a miner gained as much as 57 percent of the network’s hashrate. Featured Image from Shutterstock 評論：沒想到有機會可以見證到51%算力攻擊 -- 「不需要讓青少年有判斷力和批判力。只要給他們汽車、摩托車、美麗的明星、刺激的音樂、流行的服飾，以及對同伴的競爭意識就行了。剝奪青少年的思考力，根植他們服從指導者命令的服從心才是上策。讓他們對批判國家、社會和指導者保持著一種動物般原始的憎惡。讓他們深信那是少數派和異端者的罪惡。讓他們都有同樣的想法。讓他們認為想法和大家不同的人就是國家的敵人……」 by 阿道夫·希特勒 -- ※ 發信站: 批踢踢實業坊(ptt.cc), 來自: 118.163.51.199 ※ 文章網址: https://www.ptt.cc/bbs/DigiCurrency/M.1527153673.A.229.html

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qxxrbull

05/24 17:27, 6年前 , 1^F

05/24 17:27, 1^F

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darkdixen

05/24 17:28, 6年前 , 2^F

05/24 17:28, 2^F

原來如此，因為沒有特別關切XVG ※ 編輯: e12518166339 (118.163.51.199), 05/24/2018 17:29:19

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tcn1john

05/24 18:40, 6年前 , 3^F