Bitcoin's biggest threat yet: a miner takeover

The Bitcoin digital currency system is in danger of losing its credibility as an independent payment system because of the growing power of a group that runs some of the computers behind it.

In recent weeks, a British-based "mining pool" called GHash has amassed nearly half of the Bitcoin computing power and has briefly gone over 50 percent. Miners operate the computers that keep track of bitcoins and create additional coins.

Miners pool their computing power to spread the financial risk of their operations. If GHash amasses more than half of the computing power devoted to Bitcoin, it could in theory control the flow of transactions, freeze people out of the network and keep all future bitcoins for itself.

Although GHash says it's committed to preserving Bitcoin as a trustable technology, the mere fact that one player can amass majority control could undermine trust in the currency, which is worth only what people are willing to pay for it.

"The entire premise of bitcoin relies on the fact that no single authority would control the majority of the mining power," said Ittay Eyal, a Cornell University researcher who studies bitcoin vulnerabilities.

The value of bitcoins has fallen 6 percent in a week to around US$600 as the threat posed by GHash has become clearer, although the decline is within the range of normal fluctuations for the volatile currency.

http://www.stuff.co.nz/technology/digital-living/60109915/bitcoins-biggest-threat-yet-a-miner-takeover.html
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Bitcoin's biggest threat yet: a miner takeover PgkowJT

Bitcoin's biggest threat yet: a miner takeover PgkowJT

Bitcoin's biggest threat yet: a miner takeover Bitcoins-not-accepted-cartoon

Bitcoin's biggest threat yet: a miner takeover Hugo_Bitcoin-cartoon2

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Bitcoin's biggest threat yet: a miner takeover

Bitcoin's biggest threat yet: a miner takeover

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