Tag: elliptic curve cryptography

Cryptography

Guidance for Choosing an Elliptic Curve Signature Algorithm in 2022

Post author By Soatok
Post date May 19, 2022
19 Comments on Guidance for Choosing an Elliptic Curve Signature Algorithm in 2022

A cartoon wild canid on the Internet provides general guidance on elliptic curve cryptography parameter choices.

Tags asymmetric cryptography, Brainpool curves, cryptography, digital signature algorithm, ECDSA, Ed25519, Ed448, EdDSA, elliptic curve cryptography, P-256, P-384, P-521, secp256k1, secp256r1, secp384r1, secp521r1, Security Guidance

Cryptography Software Security

Soatok’s Guide to Side-Channel Attacks

Post author By Soatok
Post date August 27, 2020
20 Comments on Soatok’s Guide to Side-Channel Attacks

If you’re ever tasked with implementing a cryptography feature–whether a high-level protocol or a low-level primitive–you will have to take special care to ensure you’re not leaking secret information through side-channels. The descriptions of algorithms you learn in a classroom or textbook are not sufficient for real-world use. (Yes, that means your toy RSA implementation […]

Tags asymmetric cryptography, constant-time, cryptography, ECDH, ECDSA, elliptic curve cryptography, RSA, Security Guidance, side-channels, symmetric cryptography

Cryptography Vulnerability

Learning from LadderLeak: Is ECDSA Broken?

Post author By Soatok
Post date May 26, 2020
4 Comments on Learning from LadderLeak: Is ECDSA Broken?

A paper was published on the IACR’s ePrint archive yesterday, titled LadderLeak: Breaking ECDSA With Less Than One Bit of Nonce Leakage. The ensuing discussion on /r/crypto led to several interesting questions that I thought would be worth capturing and answering in detail. What’s Significant About the LadderLeak Paper? This is best summarized by Table […]

Tags crypto, cryptography, digital signature algorithm, ECDSA, elliptic curve cryptography, LadderLeak