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#EdDSA

2 articles with this tag.

Modern Asymmetric Algorithms Advanced

Ed25519 Signatures

Ed25519 is the EdDSA signature scheme on the Edwards curve of Curve25519, defined in RFC 8032. Learn how a 32-byte seed becomes a key, how a deterministic nonce replaces random numbers, how a signature is checked with the cofactor, and why the range check on S matters.

Oct 20, 2026 19 min read

Modern Asymmetric Algorithms Advanced

EdDSA

EdDSA replaced random nonces with deterministic ones, closing off one of ECDSA's worst failure modes. Here's the math behind Ed25519.

Jul 25, 2025 8 min read

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