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Neo finalizes NEP-20 wallet login standard with Challenge/Response authentication
Neo co-founder Erik Zhang has finalized NEP-20, a wallet-based authentication standard that enables users to sign in to websites, games, and apps with a Neo wallet rather than usernames and passwords. First proposed in March 2021 and revisited with active review in late March 2026, the specification now carries an "Accepted" label in the Neo Enhancement Proposals repository. NEP-20 relies on an off-chain Challenge/Response signature flow and currently supports ECDSA-P256.