⚠️ NOTE: This tool is no longer under active maintenance.

cribdrag Released after LOL Bitcoin party at DEF CON 21 Daniel Crowley [email protected] 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/