Polish astronomer Johannes Hevelius (1611-1687) using a telescope fitted with a quadrant. Hevelius was one of several European astronomers who drew heavily on work of Persian and Arabic astronomers.
Mention Bitcoins and people think ‘anonymous currency’. However, that’s only one instance of how the underlying public-key cryptographic protocol can be used. For example, at a conference last week, in my presentation, I said it was an approach that I’m increasingly thinking about as a way to re-frame the discussion between centralised and decentralised systems.
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