Proof-of-Stake Resources

CASPER

Casper is a security-deposit based economic consensus protocol that is set to eventually replace the proof-of-work incentive system currently in place for the Ethereum public network. The developers working on CASPER include Vitalik Buterin, Greg Meredith, and Vlad Zamfir.

My recommendation is to read these links in order to gain the best perspective on the thought behind CASPER proof-of-stake previously vs today:

• "On Stake" - Vitalik Buterin (7/5/14)

• "Slasher Ghost, and Other Developments in Proof of Stake" - Vitalik Buterin (10/3/14)

• "Proof of Stake: How I Learned to Love Weak Subjectivity" - Vitalik Buterin (11/25/14)

• "Introducing Casper “the Friendly Ghost” - Vlad Zamfir (8/1/2015)

• "Vitalik Buterin Speaks About the Ethereum Foundation, Proof-of-Stake and More" - Coinjournal

• Understanding Serenity, Part I: Abstraction

• Understanding Serenity, Part 2: Casper

Latest CASPER Specification/Implementations

• Vitalik's CASPER Research/Python Implementation in GitHub

• Vitalik's CASPER Spec Google Document

• Greg/Vlad's GitHub Repo for their CASPER Research

Community Discussions of Interest

• "Introducing Casper “the Friendly Ghost” Reddit Comments

• "If Ethereum adopts Casper Proof of Stake, it is very likely that it will become more decentralized." Reddit post by Vlad Zamfir

• Research Ethereum Gitter Channel Sometimes Discusses CASPER

Tendermint

Tendermint is a proof-of-stake consensus protocol developed by Jae Kwon and Ethan Buchman. I have seen it implemented in Eris with an Ethereum VM backing.

• Tendermint.com

• Tendermint Whitepaper

• Tendermint Wiki

• Tendermint Go Implementation

• Eris Industries Blog Post on Their Change to Tendermint

A Good One Liner for a CASPER vs Tendermint Comparison

“Tendermint favours consistency over availability, Casper favours availability over consistency (see the CAP theorem). Tendermint doesn't punish online validators for potentially censoring potentially-actually-just-offline validators.”

More Proof-of-Stake Links

• NXT White Paper (NXT Uses Proof-of-Stake)

• "Review of Casper, Ethereum’s proposed Proof of Stake Algorithm" - Daniel Larimer (8/8/2015)

• Gaming Proof of Stake - ThePiachi's Blog

• A Treatise on Altcoins - White Paper By Andrew Poelstra

• On Stake and Consensus - White Paper By Andrew Poelstra