kovacs-andras / ecc_cryptanalysis

Automated cryptanalysis tool for elliptic curve cryptography

Automated cryptanalysis for encryptions and digital signature algorithms based on elliptic curves

Implemented attacks:

• ECDSA:
  • Lattice attacks:
    • Shared prefix nonces (we don't even have to know the prefix, because the script is smart enough to eliminate the unknown, but shared parts)
    • Shared suffix nonces
    • Known least significant bits (nonce leakage)
    • Known most significant bits
  • Nonce reuse attack (the classic PS3 mistake, common challenge)
• DLP:
  • Pohlig-Hellman attack

Requirements

• sage
• unittest
• pycryptodome
• hashlib
• TODO: dockerized solution

Usage

• ECDSA: python3 main.py -s -i examples/ddc2022_hard.json

Unit tests:

• Run all unit tests: python test.py

Mathematical background:

• Details written down in some of the scripts
• https://eprint.iacr.org/2023/032.pdf -> the best explanation that I've ever encountered about lattices
• https://eprint.iacr.org/2019/023.pdf -> awesome work, epic bitcoin blockchain cryptanalysis