45% it's already very dangerous, it gives you very good chance of double spending, look at this Analysis of Hashrate-Based Double Spending (especially page 10).
http://arxiv.org/pdf/1402.2009v1.pdf
Topic: Who cares about the 45% Ghash.io have - will you care when they are at 51%? - page 4. (Read 4461 times)
June 07, 2014, 11:47:49 AM
June 07, 2014, 11:41:52 AM
I'm really surprised more people aren't talking about this or doing something about it.
June 07, 2014, 11:22:26 AM
Who cares about the 45% Ghash.io have - will you care when they are at 51%?
Nearly nobody is discussing about that time Ghash.io hit that high level against.
Why? Isn't it a problem? ( remember 7th Janurary what happend to the price and what Ghash.io tolds us on 9th ....)
Update:
"Who cares about double spend. The more important risk is jamming up the system indefinitely by not allowing transactions through, or implementing white lists by only allowing certain transactions through from preapproved addresses.?"
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