Posts Tagged PoW

Theoretical and Practical Nonoutsourceable Puzzles

The fact that has reached twice 51% of the Bitcoin hashing power this year has pushed scientist and alt-coin creators to find for other proof-of-work puzzles that discourage mining coalitions. Several months ago I read the foundations of Nonoutsourceable Puzzles as proposed by Andrew Miller, and now his paper (working with Elaine Shi, Jonathan […]

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Ethereum “Dagger” PoW function is flawed

Ethereum is a new cryptocurrency that attempts to provide a Turing complete scripting system for cryptocurrencies and other complex contracts. It may seem to the newcomers that it is a radical new design, but it is not. The first coin to propose such a system was QixCoin (a Turing complete coin) and it was published […]