Ignacio Hagopian (@jsign) blog

About me

I'm part of the zkEVM team at the Ethereum Foundation.

You can find me on Twitter/X, GitHub, or by email.

Blog posts

1. Deep dive into Circle-STARKs FFT
   Oct 13, 2024
2. Anatomy of a Verkle proof
   Jan 19, 2024
3. Tonelli-Shanks with precomputed dlog tables
   Mar 5, 2023
4. Write barriers in the Go garbage collector
   Jan 25, 2022
5. The intuition behind Algorand's cryptographic sortition
   Mar 27, 2019

See all articles...

Pinned repos

• go-kzg-ceremony-client: An EIP-4844 KZG Powers of Tau ceremony client.
• zig-verkle-crypto: Cryptography for Ethereum Verkle Trees.
• curdleproofs: A zero-knowledge shuffle argument.
• poseidon: A Zig implementation of Poseidon hash function.
• merlin: Composable proof transcripts for public-coin arguments of knowledge.
• go-filsigner: Pure Go Filecoin signing library.

HackMD docs and presentations

• Code-access gas overhead and chunkers comparison
• Preimages generation & distribution strategy
• Another iteration of VKTs MSM
• Batch affine points addition vs. mixed additions
• Verkle Trees 101 (presentation)
• Verkle Trees - Proof creation/verification notes
• Verkle Trees - BLOCKHASH opcode (presentation) Better looking into EIP-2935 now.
• Bandersnatch - Finite-field square root optimization notes