Uploaded October 2025 | Updated September 2026, 1 day ago
Proof is in the Pudding is an IRL series of whiteboard sessions hosted by zkSecurity Co-founder and Archetype Research Advisor, David Wong.
Each session, David gives a 201-level lecture about the in’s and out’s of cryptography and ZK, followed by a group discussion.
In Session 06, David talks all things data availability sampling. He starts with an overview of the types of data that blockchains typically store before getting into the inner workings of rollups, Ethereum’s blobs, DA chains, and the elements of verifiable sharding. David closes out this session with an explanation of erasure-correcting codes and types of binding, including position, code, and reconstruction.
To join a future session of Proof is in the Pudding, please reach out to an Archetype team member!
📬 You can also receive invites to other Archetype events and monthly happy hours by signing up for our newsletter here: eepurl.com/iCApL2
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⌛️ TIMESTAMPS
0:00 Intro
3:09 Types of data and datachains
9:56 Rollups: optimistic and ZK
19:03 Short-term data storage: DA chains and challenges
23:52 Blobs
32:44 Verifiable sharding: dissemination, erasure correcting codes, and reconstruction
50:47 Foundations of data availability sampling
54:31 Encoding: Reed-Solomon and tensor
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👋 FOLLOW US
David: https://x.com/cryptodavidw
zkSecurity: https://x.com/zksecurityXYZ
Archetype: https://x.com/archetypevc
🌐 LINKS
Foundations of DAS Paper: eprint.iacr.org/2023/1079
zkSecurity: https://www.zksecurity.xyz/
Archetype: https://www.archetype.fund/
—
DISCLAIMER: The information in this video is the opinion of the speaker(s) only and is for informational purposes only. You should not construe it as investment advice, tax advice, or legal advice, and it does not represent any entity's opinion but those of the speaker(s). For investment or legal advice, please seek a duly licensed professional.
Proof is in the Pudding is an IRL series of whiteboard sessions hosted by zkSecurity Co-founder and Archetype Research Advisor, David Wong.
Each session, David gives a 201-level lecture about the in’s and out’s of cryptography and ZK, followed by a group discussion.
In Session 06, David talks all things data availability sampling. He starts with an overview of the types of data that blockchains typically store before getting into the inner workings of rollups, Ethereum’s blobs, DA chains, and the elements of verifiable sharding. David closes out this session with an explanation of erasure-correcting codes and types of binding, including position, code, and reconstruction.
To join a future session of Proof is in the Pudding, please reach out to an Archetype team member!
📬 You can also receive invites to other Archetype events and monthly happy hours by signing up for our newsletter here: eepurl.com/iCApL2
—
⌛️ TIMESTAMPS
0:00 Intro
3:09 Types of data and datachains
9:56 Rollups: optimistic and ZK
19:03 Short-term data storage: DA chains and challenges
23:52 Blobs
32:44 Verifiable sharding: dissemination, erasure correcting codes, and reconstruction
50:47 Foundations of data availability sampling
54:31 Encoding: Reed-Solomon and tensor
—
👋 FOLLOW US
David: https://x.com/cryptodavidw
zkSecurity: https://x.com/zksecurityXYZ
Archetype: https://x.com/archetypevc
🌐 LINKS
Foundations of DAS Paper: eprint.iacr.org/2023/1079
zkSecurity: https://www.zksecurity.xyz/
Archetype: https://www.archetype.fund/
—
DISCLAIMER: The information in this video is the opinion of the speaker(s) only and is for informational purposes only. You should not construe it as investment advice, tax advice, or legal advice, and it does not represent any entity's opinion but those of the speaker(s). For investment or legal advice, please seek a duly licensed professional.
