Knowledge Base
Browse the concepts behind Truestamp. Follow the links between concepts, or search across everything.
Tagged: side-channel
5
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.
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.
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.