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Ethereum Classic подвергся очередной атаке 51%

Сеть Ethereum Classic снова подверглась атаке 51%. Об этом сообщила компания Bitfly, оператор майнинг-пула Ethermine. Today another large 51% attack occurred on the #ETC network which caused a reorganization of over 7000 blocks which corresponds to approximately 2 days of mining. дальше »

2020-8-30 09:31


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Ethereum Classic (ETC) Suffers Second 51% Attack Less Than a Week After Losing $5.6 Million

Barely a week after nefarious agents took control of the Ethereum Classic network, double spending $5. 6 million worth of ETC, the 24th largest project by market cap is once again under attack. Earlier today (Aug 6, 2020), CoinDesk reported that 4,000 ETC blocks were “reorganized” in a classic 51 percent attack. дальше »

2020-8-6 17:00


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Monero security flaw could’ve seen XMR stolen from cryptocurrency exchanges

Privacy-focused altcoin Monero has suddenly disclosed nine security vulnerabilities — including one that could have allowed hackers to steal XMR from cryptocurrency exchanges. Until March, rogue Monero miners were hypothetically able to create “specifically-crafted” blocks to force Monero wallets into accepting fake deposits for an XMR amount chosen by the attacker. дальше »

2019-7-4 18:18


Sidechains vs Plasma vs Sharding

Special thanks to Jinglan Wang for review and feedback One question that often comes up is: how exactly is sharding different from sidechains or Plasma? All three architectures seem to involve a hub-and-spoke architecture with a central “main chain” that serves as the consensus backbone of the system, and a set of “child” chains containing actual user-level transactions. дальше »

2019-6-14 04:03


Coinbase Sides With Bitcoin Cash (BCH) Miners on 51% Attack Smack

By CCN: Coinbase researchers have released their own investigative findings into the recent Bitcoin Cash 51% attack controversy, and their conclusions might upset many Bitcoin maximalists. When Bitcoin Cash came under attack during a scheduled hardfork in mid-May, a group of miners colluded to reverse the attacked blocks and return misappropriated funds to their rightful owners. дальше »

2019-5-31 17:20


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Vertcoin 51% Attack Could Have Caused $100K in Double Spending

Vertcoin has been experiencing ongoing 51% attacks, reportedly resulting in $100K of double spending on the network.   Rough Couple of Months for Vertcoin In a detailed blog post, Coinbase security engineer Mark Nesbitt revealed that Vertcoin’s network went through repeated 51% attacks, with the largest reorganization having a length of 310 blocks and a depth of 307 blocks which, according to the specialist, may have caused double spends upwards of $100,000. дальше »

2018-12-4 13:00


Report Links 74% of Bitcoin Mining to China, Sees Threat to Network

Bitcoin, the world’s most sought-after cryptocurrency, could be at the wish and whim of Asia’s economic giant. A recent study titled “The Looming Threat of China: An Analysis of Chinese Influence on Bitcoin,” jointly researched by Princeton University and Florida International University researchers, suggests China’s mining scene has an overwhelming influence over Bitcoin, something that could invite network manipulation. дальше »

2018-10-11 00:29


A Guide to 99% Fault Tolerant Consensus

Special thanks to Emin Gun Sirer for review We’ve heard for a long time that it’s possible to achieve consensus with 50% fault tolerance in a synchronous network where messages broadcasted by any honest node are guaranteed to be received by all other honest nodes within some known time period (if an attacker has more than 50%, they can perform a “51% attack”, and there’s an analogue of this for any algorithm of this type). дальше »

2018-8-9 04:03