Create Digital_Cash.md

_books/2019/Digital_Cash.md

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+---
+title: "Digital Cash: The Unknown History of the Anarchists, Utopians, and Technologists Who Created Cryptocurrency"
+authors:
+- Finn Brunton
+year: 2019
+home_url: https://press.princeton.edu/books/hardcover/9780691179490/digital-cash
+categories:
+- history
+- digicash
+- david-chaum
+- ecash
+- egold
+- ebullion
+- libertydollar
+- bmoney
+- wei-dei
+- bitgold 
+- nick-szabo
+- ralph-merkle
+- hashtree
+- hal-finney
+- reusable-proof-of-work
+- rpow 
+- rsa
+- ron-rivest
+prices: 'hardcover: $26.95'
+editor: Princeton University Press
+---