crypto currency – Kudelski Security Research

Ledger Donjon wins Kudelski Security Crypto Challenge: Behind the scene 1/3

December 4, 2018 Guest Author

Kudelski Security is happy to publish the solution found by the team Ledger Donjon to the first challenge of Kudelski Security’s 2018 crypto challenge! Ledger

How to defeat Ed25519 and EdDSA using faults

October 4, 2017 Yolan Romailler

We’ve succesfully conducted a fault attack against EdDSA that allowed us to recover enough secret key material to produce fake signatures for any message in a way a verifier cannot detect.