Most blockchains use elliptic curves at the proof layer, and elliptic curves are exactly what quantum computers are built to break.
Here is how @Starknet is already running quantum cryptography in production:
> A working post-quantum wallet is already live on mainnet, users can transact with post-quantum signatures today
> The modern prover has already dropped its deepest curve-based dependency, quantum resistant proving is already running
> Every account is a program, so plugging in a post-quantum signature scheme is a contract upgrade, not a protocol change
> STRK20 privacy pool uses encrypted viewing keys registered with an independent auditor, private by default and compliant on lawful request
@EliBenSasson wrote hash-based proofs with no elliptic curves into the founding STARK paper in 2018. Most of the industry is only now realizing why that decision matters.
