The Stellar Consensus Protocol | David Mazières | Talks at Google
Why Hacker News recommends it
Recommended as the protocol designer's own detailed explanation of SCP.
What it is
David Mazieres presents the Stellar Consensus Protocol at Google, introducing federated Byzantine agreement. The model lets participants choose whom to trust rather than assuming fixed membership.
Recommended by 2 HN commenters across 2 different months, 2018 to 2021.
What Hacker News said
Recommends sjs382 · 2018-01 · on “2018 Stellar roadmap”
Crap. I'll reproduce the answer here, then: > Tl;dr: Stellar’s protocol (SCP) uses a decentralized state propagation where each node commits to a value if every node it deems trustworthy agrees while Ripple uses a supermajority vote (80%) among all validating nodes. Stellar achieves better decentralization than Ripple > A pretty old, but still relevant discussion on the bitcoin stack exchange [ [LINK] ] > Stellar started out as a fork of Ripple (now completely rewritten) so they are pretty similar in implementation and use cases. > Stellar uses the Stellar Consensus Protocol [ [LINK] ] (SCP) to achieve decentralization, while Ripple uses the XRP Ledger Consensus Process [ [LINK] ]. These are
Recommends malgorithms · 2019-05 · on “Keybase and Stellar is live for everyone”
David Mazières (designer of the protocol) has given a number of talks. Here's a good video of his talk at Google, and I believe it's the one I watched a couple years ago: [this video]
Cites max_ · 2021-05 · on “Decentralized trust graph for online value exchange without a blockchain (2017)”
It seems so. Its the notion of "Trust Lines"[0] All this thing does is limit potential losses from fraud. Not eliminating. The main value proposition of a blockchain is to solve the "principal-agent" problem [1] and gis simply reduces the risk but doesn't remove it entirely. Plus some of the requirements on a node having to be online (in a decentalized, byzantine environment) all the time are unrealistic. This seems more like ripple. Stellar uses a more sophisticated notion of "quorum slices" and is resistant to byzantine faults [2] [0]: [LINK] [1]: [LINK] [2]: [this video]