EB105 – Vlad Zamfir: Bringing Ethereum Towards Proof-Of-Stake With Casper

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With Proof-of-Stake (PoS) a blockchain is secured not by spending an external resource such as electricity but by using value internal to the chain itself. The promise of higher security at a lower cost is what also drives Ethereum to plan a move away from Proof-of-Work to PoS in the future.

Ethereum researcher Vlad Zamfir, who leads their effort in the complex search for the optimal PoS consensus system joined us for an in-depth discussion of the challenges of PoS, the approach Casper is taking and what consensus in Ethereum land could look like in the future.

Topics covered included:
– How he became interested in consensus and Proof-of-Stake (PoS)
– Why Ethereum plans to switch to the PoS systems Casper in the future
– What the Long-Range Attack and Nothing-at-Stake problems are and how Casper addresses them
– How a betting mechanism is used to get validators to reach consensus
– What centralization pressures exist for validators and what operating a validator will look like
– The role of security deposits in Casper
– The difference between Tendermint and Casper
– Whether forks create big UI/UX issues for Casper
– Why Casper is very light client friendly

Links mentioned in this episode:

– Introducing Casper – Ethereum Blog
– Review of Casper, Ethereum’s proposed Proof of Stake Algorithm
– Casper Protocol Specification
– Slasher, Ghost and Other Developments in Proof-of-Stake
– Epicenter Bitcoin Episode 58 with Vitalik Buterin on Proof-of-Stake


– Hide.me: Protect your privacy and personal data with a free VPN account at Hide.me/epicenter

Show notes:

Epicenter Bitcoin is hosted by Brian Fabian Crain & Sébastien Couture.

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7 thoughts on “EB105 – Vlad Zamfir: Bringing Ethereum Towards Proof-Of-Stake With Casper

  1. I do not know why people who explain things always start with the most abtract definition possible^^ instead of step by step. For the purpose of a summary this is ok, but this should be actually educational I suppose. But this interview has much valueable information. Thank you.

  2. Interesting stuff. Thanks. But please check your recording equipment/settings, your recording sounds crappy and distorted, whereas Vlad sounds totally clear.

  3. this makes PoS sound like it's going to be incredibly difficult for it to be something that isn't going to run into at least a couple mishaps during it's lifetime.

    also is this an old interview?

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