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README.md

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

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/

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cribdrag - an interactive crib dragging tool for cryptanalysis on ciphertext generated with reused or predictable stream cipher keys

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