Bitcoin, Explained — The Technical Side of Bitcoin

Episode 89: B-money and RPOW

In this episode of Bitcoin, Explained, Aaron and Sjors discuss two more electronic cash projects that predate Bitcoin: Wei Dai’s b-money and Hal Finney’s RPOW. As detailed in Aaron’s new book, The Genesis Book, these sys...

2024-01-22

Episode notes

In this episode of Bitcoin, Explained, Aaron and Sjors discuss two more electronic cash projects that predate Bitcoin: Wei Dai’s b-money and Hal Finney’s RPOW. As detailed in Aaron’s new book, The Genesis Book, these systems introduced design elements that were later utilized by Satoshi Nakamoto. Aaron and Sjors explain what these elements are, and how the inspired Bitcoin’s design.


To buy Aaron’s new book, visit www.thegenesisbook.com.


Mentioned:


B-money (archive link): https://web.archive.org/web/20050211031649/http://www.eskimo.com/~weidai/bmoney.txt


RPOW (archive link): https://nakamotoinstitute.org/finney/rpow/index.html


Chapters


00:00:00 Introduction and COLDCARD sponsor

00:01:37 Wei Dai’s b-money and its cypherpunk origins

00:04:57 Shared ledgers, double spending and server consensus

00:12:34 Monetary policy and stable purchasing power

00:17:34 Proof-of-work auctions and b-money’s legacy

00:22:46 Hal Finney’s RPOW: reusable proof of work

00:29:14 Remote attestation and trust in IBM

00:34:55 Why RPOW never took off


===


This episode’s sponsor: ⁠CoinKite⁠, maker of the ColdCard


Aaron’s Twitter: ⁠@AaronvanW⁠


Aaron’s Nostr: npub1art8cs66ffvnqns5zs5qa9fwlctmusj5lj38j94lv0ulw0j54wjqhpm0w5


Sjors’ Twitter: ⁠@provoost⁠


Sjors’ Nostr: npub1v25jqj332n630klwtqeqxgyrjl4alw4phmluhu2x6lcxzwy9m03suqexw3


If you’d like to sponsor the show, please email info at bitcoinexplainedpodcast.com


⁠https://bitcoinexplainedpodcast.com/