AN UPGRADE IS NOT AN UPGRADE IF THE OLD DOOR STAYS UNLOCKED After looking into quantum security I keep coming back to how much of @Starknet can actually change without rebuilding everything around it. Its STARK proofs already rely on hash based cryptography. Programmable accounts can adopt new signature schemes. There is still work to do across wallets existing contracts and the Ethereum infrastructure it depends on. Being prepared for quantum threats does not mean claiming everything is secure today. It means knowing what needs to change and having a realistic path to get there. The ability to adapt may matter as much as the cryptography a network uses right now. One detail from the updated Quantum Hub checklist is the downgrade lock. If you replace a signing method you also need to make sure the old authorization path cannot be used to sneak back in. A Ready or Argent v0.5.0 account can replace its old Stark curve owners with a Secp256r1 owner and remove the old guardian routes. Once properly configured signatures from the removed owners can no longer authorize transactions. Both methods are classical. This is not a post quantum wallet launch. An upgrade is not much of an upgrade if you leave the old door unlocked. Starknet is preparing for quantum threats. It is not fully quantum safe today. https://t.co/qp7hlh2lm5