Things that use Ed25519 - IANIX
IANIX catalog tracking real-world deployment of the Ed25519 EdDSA signature scheme across protocols, operating systems, hardware security modules, and cryptographic libraries.
Overview
“Things that use Ed25519” is a continuously updated deployment tracker maintained by IANIX that catalogs the protocols, software, operating systems, hardware, and cryptographic libraries implementing Ed25519. Ed25519 is a public-key signature system created by Daniel J. Bernstein, Niels Duif, Tanja Lange, Peter Schwabe, and Bo-Yin Yang, first published in 2011. It is an instantiation of EdDSA (Edwards-Curve Digital Signature Algorithm) over the twisted Edwards curve related to Curve25519. The page functions as evidence of Ed25519’s broad, systematic adoption as a modern replacement for older signature schemes.
Key points
- Ed25519 is designed for speed and strong security: it produces deterministic signatures (removing a class of nonce-reuse vulnerabilities), resists many side-channel attacks, and requires relatively little code to implement.
- Adoption accelerated after the 2013 disclosures about NSA surveillance, because Ed25519 avoids the NIST-recommended curves that drew scrutiny over possible weaknesses.
- The catalog spans protocols (TLS 1.3, SSH, Signal, Tor, roughtime), networks and ledgers (Tor, Zcash, I2P, Stellar, Sia), operating systems (OpenBSD, FreeBSD, NetBSD, OpenWrt), hardware (YubiKey 5, Nitrokey, Luna HSMs), and libraries (libsodium, TweetNaCl, Monocypher, BoringSSL, LibreSSL).
- Standards milestones it records include RFC 8032 (2017, standardizing EdDSA), RFC 8446 (2018, TLS 1.3), and NIST FIPS 186-5 (2023), which added U.S. federal approval of Ed25519.
- The page also tracks operational defaults, such as OpenSSH generating Ed25519 keys by default (9.5, 2023) and experimental post-quantum hybrid key handling in later OpenSSH releases.
Relevance to Truestamp
Truestamp signs its internal blockchain artifacts with Ed25519, so this catalog documents the wide interoperability and vetted security properties of the same signature scheme. It supports the choice of Ed25519 as a standards-backed, widely deployed primitive for Ed25519 signatures that verifiers can validate with common, well-audited libraries.
Citations
- Things that use Ed25519 - IANIX. Maintained by IANIX; deployment tracker, updated 2026.