The interesting point about the second possible attack is that a weaker form is possible even with less than 50% of the hashing power. The term to search for in

The interesting point about the second possible attack is that a weaker form is possible even with less than 50% of the hashing power. The term to search for in a search engine is "selfish mining", e.g. here: http://bitcoinmagazine.com/7953/selfish-mining-a-25-attack-against-the-bitcoin-network/ http://bitcoinmagazine.com/7953/selfish-mining-a-25-attack-a...