From my article:
http://www.cryptocoinsnews.com/news/bitcoin-mining-pool-ghash-io-is-unapologetic-risk-theoretical-51-attack/2014/06/12CCN reached out to Ghash/Cex days ago and has just received a response from Jeffrey Smith, Cex.io’s Chief Information Officer, to a short interview:
CCN: What percentage of ghash.io’s hashing power is from cex.io? What percentage from other miners?
Jeffrey Smith: The hashing power of CEX.IO constitutes 25 percent of GHash.IO total hash rate. The rest are independent miners.
CCN: Also… how is the functionality for allowing cex users to point their hashing power elsewhere?
Jeffrey Smith: It is very hard to implement this functionality, since on CEX.IO we allow users to trade even small portions of GHS (e.g. 0.001 GHS), and these small amounts cannot be separately connected to other mining pools.
CCN: What has ghash.io learned from the last time this happened?
Jeffrey Smith: We understand that the Bitcoin community strongly reacts to GHash.IO’s percentage of the total hash rate. However, we would never do anything to harm the Bitcoin economy; we believe in it. We have invested all our effort, time and money into the development of the Bitcoin economy. We agree that mining should be decentralised, but you cannot blame GHash.IO for being the #1 mining pool.
CCN: What steps were put in place to ensure something like this didn’t happen again? (stop accepting miners when you guys are at 50%?)
Jeffrey Smith:
CCN: Which failsafes have been tripped in the last few days; what has ghash.io done in the last few days?
Jeffrey Smith: We strongly believe that Bitcoin mining should be decentralised. We have been working hard for the past several months to ensure decentralisation of Bitcoin mining. Soon we will present a valid solution to this issue.
CCN: What is ghash.io’s comfortable level for total percentage of network hashrate? It seems there might be some disconnect between your company’s vision and the community’s tolerance level.
Jeffrey Smith: The bitcoin community determines the comfortable level of the GHash.IO’s percentage. We aim to please our users and provide quality trading and mining environment, while maintaining stability and prosperity of the Bitcoin community.