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Starwood breach affecting 500M users reportedly part of a larger Chinese state-sponsored attack

Remember that massive breach of the Mariott-owned Starwood hotel chain from last month, which saw 500 million users’ data stolen? The New York Times reports that the intrusion was part of a larger state-sponsored intelligence-gathering effort spurred on by China‘s spy agency, the Ministry of State Security. дальше »

2018-12-12 09:46


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Starwood breach affecting 500m users reportedly part of a larger Chinese state-sponsored attack

Remember that massive breach of the Mariott-owned Starwood hotel chain from last month, which saw 500 million users’ data stolen? The New York Times reports that the intrusion was part of a larger state-sponsored intelligence-gathering effort spurred on by China‘s spy agency, the Ministry of State Security. дальше »

2018-12-12 09:46


Is ASIC resistance really a good idea for PoW coins? Vertcoin suffered a 51% attack because of it

Vertcoin is under a 51% attack because of its wish for ASIC resistance A Medium post from Mark Nesbitt, security engineer at Coinbase, revealed that Vertcoin is being 51% attacked at the moment. He first describes the 51% attack as a situation in which a malicious node operator who controls over half of the network’s […] The post Is ASIC resistance really a good idea for PoW coins? Vertcoin suffered a 51% attack because of it appeared first on CaptainAltcoin. дальше »

2018-12-5 04:03


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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


Indian Institute of Tech (IIT) Professor: A 51% Blockchain Attack on Bitcoin Isn’t Advantageous or Profitable

It seems that it might be more difficult than expected to perform a 51% attack on Bitcoin’s network. According to Professor Saravanan Vijayakumaran, an Associate professor at the Indian Institute of Technology (IIT) Bombay, a 51% attack on Bitcoin’s network would require ‘significant expenditure’ and would provide ‘little financial returns.’ This information was released in […] дальше »

2018-11-28 00:16


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A Bug Making Ethereum Transactions on Exchanges Vulnerable Has Been Fixed

A bug centering around a new Ethereum token, GasToken, which was enabling abuse on cryptocurrency exchanges, appears to have been resolved. The details are provided in a report originally published on November 13, 2018, that discussed how the bug was exploited by attackers, and what digital platforms could do if they wished to protect their hot wallet funds. дальше »

2018-11-22 00:34


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Potential Dusting Attack can Disrupt Bitcoin Users’ “Privacy”

The Bitcoin network appears to be under attack once again. No malicious miners are colluding to take over the network, albeit a new flood of transactions might cause some concerns. Samourai Wallet dubs this as a “dusting attack”, which can have troublesome consequences for those masking their tracks through extra privacy features and services. дальше »

2018-10-27 04:17


Hacking Bitcoin: Report Says China Can Attack the Bitcoin Mining Network

According to a recent research report compiled by researchers from the Florida International University and Princeton University, China has tremendous influence over the bitcoin network largely due to its monopolization… The post Hacking Bitcoin: Report Says China Can Attack the Bitcoin Mining Network appeared first on CoinCentral. дальше »

2018-10-17 22:58


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


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Research: China has the power to destroy Bitcoin

A damning new study has suggested China holds threatening influence over Bitcoin – and perhaps even the ability to attack and ultimately destroy the entire Bitcoin network. Academics from Princeton and Florida International Universities have explored how China “threatens the security, stability, and viability of Bitcoin” with its “political and economic control over domestic [cryptocurrency] activity […] [and] internet infrastructure. дальше »

2018-10-8 19:07


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What Bitcoin Did Gets Technical with Crypto-Educator Jimmy Song

<iframe style="border: none" src="//html5-player. libsyn. com/embed/episode/id/7132345/height/90/theme/custom/autoplay/no/autonext/no/thumbnail/yes/preload/no/no_addthis/no/direction/backward/render-playlist/no/custom-color/87A93A/" height="90" width="100%" scrolling="no"  allowfullscreen webkitallowfullscreen mozallowfullscreen oallowfullscreen msallowfullscreen></iframe> On the latest episode of What Bitcoin Did, host Peter McCormack interviews Jimmy Song, a consultant in blockchain education, to take an in-depth look at a relatively recent incident in the world of cryptocurrency and use that as an example to segue into a deeper discussion on the possible trajectories of Bitcoin itself. дальше »

2018-10-6 00:05


[Newsflash Update]: Bitcoin Network Bug Leaves BTC Blockchain Particularly Vulnerable Still

Last week, the Bitcoin Core team came out with a brand-new update to its client which was supposed to address a major vulnerability on the chain. The vulnerability made it easy for hackers to execute a “denial of service” attack on the network, which could be a potentially devastating security problem. But in many ways, […] дальше »

2018-9-28 08:58


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Bittrex Delists Bitcoin Gold After Failure to Repay $252,000 in Losses

Cryptocurrency trading platform Bittrex delists Bitcoin Gold trading options after failing to negotiate reparations stemming from a 51 percent attack in May. The Four Day Attack Bitcoin Gold (BCG), a Bitcoin hard-fork released in November of 2017, is continuing to feel the negative effects from a 51 percent attack on its network in May. дальше »

2018-9-6 17:00


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


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Governance, Part 2: Plutocracy Is Still Bad

Coin holder voting, both for governance of technical features, and for more extensive use cases like deciding who runs validator nodes and who receives money from development bounty funds, is unfortunately continuing to be popular, and so it seems worthwhile for me to write another post explaining why I (and Vlad Zamfir and others) do not consider it wise for Ethereum (or really, any base-layer blockchain) to start adopting these kinds of mechanisms in a tightly coupled form in any significant way. дальше »

2018-7-21 23:03