Format Online paper / PDF
Location PART 1 - TONS OF PUNKS, ONE BIG JERK CHAPTER 4: KEYSTROKES AND BRUSHSTROKES Understanding the Medium

"Bitcoin’s proof-of-work system was explicitly described by Satoshi Nakamoto as similar to Adam Back’s Hashcash."

The Bitcoin white paper explicitly states that its distributed timestamp server uses a proof-of-work system similar to Hashcash.

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Source title Bitcoin: A Peer-to-Peer Electronic Cash System
Source authors Satoshi Nakamoto
Source year 2008
Confidence high
Importance high
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