Glossary

EdDSA

Edwards-curve Digital Signature Algorithm

Edwards-curve Digital Signature Algorithm (RFC 8032), usually used as Ed25519. Its nonces are derived deterministically from the key and the message, which removes ECDSA’s nonce-reuse failure, and FIPS 186-5 approves it.

Also called: Ed25519 · Ed448
Defined in: RFC 8032

Covered in

Reference

Choose cryptographic algorithms and parameters by job

A sourced quick reference for October 2026: which algorithm and parameters to use for encryption, hashing, passwords, MACs, signatures, key agreement, key derivation, randomness and TLS, the matching APIs in Node.js, Python, Java, Go and .NET, and where post-quantum migration stands.

Practice: Insecure randomness lab: Generate unguessable API keys