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Password Cracker Based on Leaked Entropy in a Database

This project demonstrates how password entropy saved alongside a password hash can be used to significantly reduce the time required to crack hashed passwords.

For a further explanation see: http://gavinmiller.io/2016/a-tale-of-security-gone-wrong/

How to Use

  • Clone the project: git clone git@github.com:gavingmiller/entropy-password-cracker.git
  • You may need to install SQLite3 bindings, e.g.:
    • port install sqlite3 +universal
    • yum install sqlite-devel
    • apt-get install libsqlite3-dev
  • Install the required libraries: bundle install
  • Crack the user database: ruby crack_user_database.rb
  • generate_user_database.rb is available for you to modify/play with

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