This is 0x.build.
A collection of visual notes and interactive experiments on mathematics, cryptography, and old computers.

Elliptic Curves

Finite Fields

Entropy

Hash

Keccak-256

Private Key

Mnemonic

HD Wallet

ECDSA

Curve Origins

MPC / TSS

Passkeys

Ethereum Block

Ethereum Consensus

Transaction

EIP-191

EIP-712

EIP-2612

EIP-4361

Swap

RFQ

Intent Trading

Hex

Base58

RLP

SSZ

Reviving an IBM LPFK

DEC VT220

Space Age Optimism

Claude Code Since 1960

This is 0xa.eth
An identity, currently building at OKX and exploring the mathematics behind cryptography, the mechanics of Ethereum, and the tools that shape how we think. I bring old computers back to life and experiment with AI, turning what I learn into visual notes and interactive experiments.