Coinbase says Ethereum Classic suffers a 51% attack; ETC denies



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<img width = "696" height = "400" clbad = "entry-thumb td-modal-image" src = "https://portaldobitcoin.com/wp-content/uploads/2019/01/shutterstock_1106070026- 696×400.jpg "srcset =" https://portaldobitcoin.com/wp-content/uploads/2019/01/shutterstock_1106070026.jpg 696w, https://portaldobitcoin.com/wp-content/uploads/2019/01/shutterstock_1106070026- 300×172.jpg 300w "sizes =" (max-width: 696px) 100vw, 696px "alt =" Coinbase says Ethereum Clbadic suffers 51% attack ETC denies "title =" Coinbase claims Ethereum Clbadic suffers an attack of 51%; Coinbase, the largest cryptocurrency exchange in the United States, reported to have detected a 51% attack of the Blockquain chain of the Ethereum Clbadic, implying a double expense " On Monday, the company posted a text in Medium to explain the case:

"To protect customer funds, we immediately stop the movements of these funds in the blockchain ETC. (19659003) In the official report of ETC on Twitter, the information is different: the officials deny the attacks and declare that Coinbase should have

"With regard to the recent mining events we can have an idea of ​​where the hashate comes from. "ASIC manufacturer, Linzhi, confirmed testing new 1400 / Mh ethash #projectLavaSnow
– Probably selfish mining (not at 51% attack)
– Double undetected expenses "

Regarding recent mining events. We may have an idea of ​​the origin of the haschate
The ASIC manufacturer, Linzhi, confirmed the testing of new machines 1400 / Mh ethash #projectLavaSnow
– Mining probably selfish (19659009) – Ethereum Clbadic (@eth_clbadic) January 7, 2019

The brokerage firm Poloniex followed the same procedure as Coinbase and also disabled access to the portfolios. On Twitter, we read:

"Due to a potential attack of 51%, the ETC portfolios have been deactivated and will not be reactivated until tomorrow (at least) .We will update this topic when we have access to the ETC. a firmer timetable to reactivate deposits and withdrawals

After the publication of Coinbase, the Ethereum Clbadic has extended the decline and is trading at $ 5, with a devaluation of 7.2% the same day

Attacks

When a person holds most of the network processing capacity of a blockchain (more than 50% of the hash rate), she becomes able to cancel transactions , to profit from it, while preserving cryptomadic units.

19659003] At the beginning of December, it was the turn of the cryptomeo Vertcoin (VTC), according to a publication made Sunday (02) by a security specialist, the flight could reach $ 100,000, approximately $ 380,000. 659002] The same thing happened with Bitcoin Gold. In early September, Bittrex, one of the world's largest crypto-coin exchanges, announced the withdrawal of support for BTG.

The reason, according to an exchange release, was the occurrence of a series of double expenses due to an attack.


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