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Medium 4.3
Ed25519 Signature Malleability in ed25519-java Due to Missing Scalar Range Check
The implementation of EdDSA in EdDSA-Java (aka ed25519-java) through 0.3.0 exhibits signature malleability and does not satisfy the SUF-CMA (Strong Existential Unforgeability under Chosen Message Attacks) property. This allows attackers to create new valid si…