cribdrag - an interactive crib dragging tool for cryptanalysis on ciphertext generated with reused or predictable stream cipher keys
Python
Latest commit 476feaa Mar 6, 2016 @unicornsasfuel unicornsasfuel Update README.md
Permalink
Failed to load latest commit information.
LICENSE.txt initial commit Aug 10, 2013
README.md Update README.md Mar 6, 2016
cribdrag.py initial commit Aug 10, 2013
samples.txt initial commit Aug 10, 2013
xorstrings.py initial commit Aug 10, 2013

README.md

cribdrag Released after LOL Bitcoin party at DEF CON 21 Daniel Crowley dcrowley@trustwave.com http://www.trustwave.com

INTRODUCTION

cribdrag is a script for performing crib dragging attacks against ciphertext encrypted using an XOR operation with a predictable key.

This script can be used to cryptanalyze:

  • One-Time Pad with reused key (XOR two ciphertexts together)
  • Any stream cipher with reused key (XOR two ciphertexts together)
  • Single character XOR
  • Multiple character XOR

REQUIREMENTS

python 2.x

USAGE

python xorstrings.py <ascii hex encoded data> <ascii hex encoded data>
python cribdrag.py [-c charset] <ascii hex encoded ciphertext>

COPYRIGHT

cribdrag - Interactive crib dragging tool Daniel Crowley Copyright (C) 2013 Trustwave Holdings, Inc.

This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/