On ECDSA Key Re-use

Networks where the common pattern is to use the same key pair across different transactions (like the EVM family of blockchains) face a greater risk, once quantum attacks become feasible. The attacker has a longer time window to derive the private key via the earlier record of transaction signatures. However, using new ECDSA key pairs per-transaction, may only offer some temporary relief; once quantum attacks become sufficiently fast, an attacker could derive the private key and front-run a targeted transaction.