Buterin Advises Rotating Multisig Keys Per Transaction as AI Poses ECDSA Risk

Ethereum co-founder Vitalik Buterin said multisignature signers should ideally use a fresh key after every transaction. He cited possible future risks that artificial intelligence could create for ECDSA-based cryptography. Buterin also cautioned against making rushed changes before such threats become concrete.

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Buterin’s guidance targets multisignature setups, where several parties must approve an action instead of one private key controlling it. He suggests each signer rotate to a new key after completing a transaction, so one approval does not rely on a key that later authorizations also use. The concern stems from possible future AI advances that might create risks for ECDSA