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Kudelski Security Research

Kudelski Security Research

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Tag: ECDSA

Polynonce: A Tale of a Novel ECDSA Attack and Bitcoin Tears

March 6, 2023 Nils Amiet

Introduction  In this blog post, we tell a tale of how we discovered a novel attack against ECDSA and how we applied it to datasets

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Quantum Attack Resource Estimate: Using Shor’s Algorithm to Break RSA vs DH/DSA VS ECC

August 24, 2021 Tommaso Gagliardoni

Most security experts are by now aware of the threat that the rise of quantum computing poses to modern cryptography. Shor’s quantum algorithm, in particular,

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Audit of ING’s Threshold ECDSA Library – And a dangerous vulnerability in existing Gennaro-Goldfeder’18 implementations

April 8, 2021 Tommaso Gagliardoni

ING (Dutch bank) recently released their own implementation of the popular Gennaro-Goldfeder’18 Threshold ECDSA signature scheme in the form of a library written in Rust.

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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.

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How (not) to break your (EC)DSA

April 10, 2017 Yolan Romailler

During an internal project pertaining to automated cryptographic testing, we discovered that many implementations don’t respect standard specifications, especially signature algorithms. Let us take a

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