Knowledge Base
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Tagged: elliptic-curve
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Library
Cryptographic Accelerators for Digital Signature Based on Ed25519
IEEE TVLSI 2021 paper by Bisheh-Niasar, Azarderakhsh, and Mozaffari-Kermani presenting two FPGA hardware accelerators for the Ed25519 (EdDSA) digital signature, with Karatsuba multiplication and side-channel countermeasures.
Difference between X25519 and Ed25519 - Cryptography Stack Exchange
Stack Exchange Q&A explaining how X25519 (ECDH key exchange) and Ed25519 (EdDSA signatures) both build on Curve25519 using different curve forms and coordinate representations.
Ed25519 Deep Dive Addendum (r/crypto)
r/crypto discussion of Cendyne's Ed25519 Deep Dive Addendum, covering inconsistent signature-validation criteria across libraries, strong unforgeability, cofactored verification, non-canonical encodings, and the design history of EdDSA.
Ed25519: high-speed high-security signatures
The official Ed25519 site by Bernstein, Duif, Lange, Schwabe, and Yang: an EdDSA elliptic-curve signature scheme over edwards25519 with 128-bit security, deterministic nonces, 32-byte keys, and 64-byte signatures.
EdDSA (Wikipedia)
Wikipedia's overview of the Edwards-curve Digital Signature Algorithm: twisted Edwards curves, Schnorr variant, deterministic nonces, Ed25519 and Ed448, key and signature sizes, and standardization.
RFC 8032: Edwards-Curve Digital Signature Algorithm (EdDSA)
IRTF/CFRG specification of EdDSA deterministic Schnorr signatures over twisted Edwards curves, defining Ed25519 (SHA-512) and Ed448 (SHAKE256), with encoding, verification, and test vectors.
ssh-keygen: Wikipedia
Wikipedia overview of ssh-keygen, the OpenSSH command-line utility that generates, manages, and converts authentication keys, covering RSA, DSA, ECDSA, and Ed25519 key types.
The Provable Security of Ed25519: Theory and Practice
Academic paper giving the first detailed security proofs for Ed25519 (EdDSA) signature variants, covering EUF-CMA, SUF-CMA, key substitution resistance, malleability, and small-subgroup element checks.
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.
Why is implementation relevant to timing attacks?
Cryptography Stack Exchange Q&A on why constant-time implementation, not just algorithm choice, defends against timing and side-channel attacks, covering the realistic attack model and data-dependent operations.