PoS Blockchains - Designs, Consensus, Attacks

a16z crypto show

Andreessen Horowitz

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4.4 • 66 Ratings

🗓️ 29 August 2022

⏱️ 50 minutes

🔗️ Recording | iTunes | RSS

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Summary

with @lera_banda @tim_roughgarden @smc90 An overview of proof-of-stake blockchains -- from quick background on how blockchains work, difference between PoS & PoW, and approaches to improving both; to digging deeper into Sybill attacks and Sybill resistance; and much more on the design (and some debates) of PoS blockchains overall.

Transcript

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0:00.0	Welcome to Web 3 with A6 and Z, a show about building the next generation of the
0:08.0	Internet from the team at A6 and Z crypto. That includes me, your host, Sonal.
0:12.2	This shows for anyone, whether computer scientist, researcher, developers, and creators,
0:17.0	community or company leader, or others, seeking to understand and go deeper on all things
0:22.4	crypto and web 3 towards a
0:24.2	decentralized community-governed internet. So in this week's episode we do an
0:28.9	overview of Proof of Steak blockchains from quick background on how blockchains work, a difference between
0:34.2	proof of work, and approaches to improving both, to digging deeper into civil attacks and civil
0:40.5	resistance, and much more on the design of proof estate blockchains.
0:45.0	We also go into therefore different consensus approaches for proof of stake, touching briefly
0:49.7	on the question slash debate of centralization versus decentralization in practice and
0:55.1	we also cover costless simulation and long-range attacks and then briefly discuss topics like
1:00.2	slashing and more.
1:01.7	We don't go into too much detail on Ethereum or the
1:03.9	merge since we cover that in an upcoming episode. Be sure to also check out our
1:08.5	YouTube channel for several introductory and deep dive videos. In particular you can find videos on the exact
1:14.3	topics discussed in this episode including proof of stake blockchains and
1:17.9	long-range attacks just search A6 and C crypto and then finally if you'd also like a more high-level survey of research and web 3 and a quick tour
1:26.3	through tech topics like VDFs, roll-ups, and more, be sure to check out episode 8 in this feed, which was a hallway style jam with the research team and this episode is also quite literally a hallway style or actually rather casual meeting room chat featuring a six and z crypto research partner Valeria or Lera
1:44.2	Nikolaenko who was previously on Novi at Meta formerly Facebook
1:48.3	where she was a research scientist and cryptographer for the DM
1:51.2	blockchain. She specializes in modern cryptography. and and co-hosting with me is A6 and Z crypto had to research Tim Ruffgarden, who is also a
	...

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