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Generate a secure passphrase
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DMP (or Dice My Pass) is a simple passphrase generator that gives you a passphrase of the desired length using EFF's long wordlist. This little tool was only created for a blog post on how to create a Ruby gem at (WIP) and should be NOT used for production, can't say much if you like it though.


Add this line to your application's Gemfile:

gem 'dmp'

And then execute:

$ bundle

Or install it yourself as:

$ gem install dmp


You can use it as a library in your code.

irb(main):001:0> require 'dmp'
=> true
irb(main):002:0> Dmp.gen_passphrase(4)
=> ["discount", "stove", "rubbing", "underage"]

Or you can use the CLI if you want to execute it in the terminal.

Generate a passphrase

$ dmp
- Passphrase: bagpipe sprinkled unscented trespass splice outlet headlamp

Generate a passphrase and copy it to the clipboard

- Passphrase: reconvene glimmer treading swerve zebra visibly veal
- Copied to clipboard.

Generate a passphrase of your desired length and check if the password appears in HIBP datasets

$ dmp gen 5 -H
- Passphrase: tavern silly afar luncheon cement
- Password is safe to use.

Warns you if your password has been discovered in a HIBP dataset.

- Passphrase: angular
- WARNING: Passphrase vulnerable 91 times!

Check a password of yours

$ dmp check
Enter your password, press ENTER when you're done.
Password (hidden): ****
- Your password appears in 213580 data sets!


  dmp about           # Displays version number and information
  dmp check           # Check if a password/passphrase is vulnerable.
  dmp gen [length]    # Generate a passphrase of the desired length.
  dmp help [COMMAND]  # Describe available commands or one specific command


Bug reports and pull requests are welcome on GitHub at This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.


The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Dmp project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.

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