Pranshu Rastogi

Q day In Part 1, we covered how Shor’s algorithm kills ECDSA, the signature scheme behind every Ethereum wallet. Your public key is exposed the moment you transact. “Harvest now, decrypt later” makes the quantum timeline irrelevant for high-value targets. EIP-8141 and account abstraction are the escape routes. Why does the ZK Stack need more effort?: ECDSA gets all the quantum attention because it’s visible. Your wallet, your MetaMask. “My private key could be stolen.” It’s visceral, personal, and it dri...

Part 1: Your Private Key Has an Expiration Date NOTE : This article is divided into series of 3, where we will focus on Signatures, Zk proofs, Hash functions, Grover’s algorithm etc. Part 1 signatures I didn’t know what Q-day meant until I read Vitalik’s 2025 post. He put a number on it: 20% chance of a cryptographically relevant quantum computer before 2030. At Devcon Buenos Aires, he went further. Elliptic curve cryptography “could break before the next US election in 2028.” That got me digging. Estima...

Every onchain action starts with a want. Swap this. Lend that. Bridge here. But wants aren’t transactions. They’re intents, and turning… Continue reading on Medium »...