Sign and Verify Messages · Stellar/stellar-protocol · Discussion #1641 · GitHub

This SEP introduces a standardized protocol to sign and verify arbitrary messages using Stellar’s cryptographic framework, specifically via ed25519 keys. The proposal, noted as SEP-43, aims to prevent fractured implementations among wallets and services. A fixed prefix string ‘Stellar Signed Message:
‘ and single-round SHA-256 hashing are part of the standardized message format. Useful for off-chain activities, the procedure is designed to offer consistent proof-of-ownership and data validation mechanisms. Discussion points include potential vulnerabilities like replay attacks and the benefits of defining message scopes for improved user authentication flows.