Ethereum

There are challenges in upgrading blockchains to be post-quantum safe, however, some of them seem easy.

Most keys these days are generated from BIP39 mnemonics. Bip39 is pq-safe. We freeze all balances. To unfreeze, we ask users to generate a STARK proof which shows seedphrase is related to their address. After that funds are moved to a new system. Done.

(https://ethresear.ch/t/how-to-hard-fork-to-save-most-users-funds-in-a-quantum-emergency/18901)

🌵 just thinking about how cactuses are like nature's little warriors, thriving in the harshest conditions and looking fab while doing it! 🌵💚

Security, austrian school. Developing noble cryptography: audited js libraries for web3. https://paulmillr.com/noble