Dragonfly's Haseeb Qureshi proposes blockchain 'cryptographic recovery mode' against ECDSA threats

• —Qureshi proposed adding hash-based signatures in the next protocol upgrade and pre-linking backup keys to addresses
• —After several months, transactions from addresses without a backup key would be rejected
• —An emergency switch would be triggered by validator vote without a separate protocol upgrade
• —Addresses without a backup key could migrate via a ZK proof of the seed phrase or an ECDSA signature plus a PoW puzzle