Switch branches/tags
Nothing to show
Find file Copy path
67777aa Feb 9, 2018
2 contributors

Users who have contributed to this file

@tarcieri @croaky
114 lines (76 sloc) 4.17 KB

miscreant.rb Latest Version Build Status Yard Docs MIT licensed Gitter Chat

The best crypto you've never heard of, brought to you by Phil Rogaway

Ruby implementation of Miscreant: Advanced symmetric encryption library which provides the AES-SIV (RFC 5297), AES-PMAC-SIV, and STREAM constructions. These algorithms are easy-to-use (or rather, hard-to-misuse) and support encryption of individual messages or message streams.

AES-SIV provides nonce-reuse misuse-resistance (NRMR): accidentally reusing a nonce with this construction is not a security catastrophe, unlike it is with more popular AES encryption modes like AES-GCM. With AES-SIV, the worst outcome of reusing a nonce is an attacker can see you've sent the same plaintext twice, as opposed to almost all other AES modes where it can facilitate chosen ciphertext attacks and/or full plaintext recovery.

For more information, see the toplevel

Help and Discussion

Have questions? Want to suggest a feature or change?

Security Notice

Though this library is written by cryptographic professionals, it has not undergone a thorough security audit, and cryptographic professionals are still humans that make mistakes. Use this library at your own risk.


This library is tested against the following MRI versions:

  • 2.2
  • 2.3
  • 2.4
  • 2.5

Other Ruby versions may work, but are not officially supported.


Add this line to your application's Gemfile:

gem "miscreant"

And then execute:

$ bundle

Or install it yourself as:

$ gem install miscreant


Please see the Miscreant Wiki for API documentation.

Yard documentation is also available.

Code of Conduct

We abide by the Contributor Covenant and ask that you do as well.

For more information, please see


Bug reports and pull requests are welcome on GitHub at


Copyright (c) 2017-2018 The Miscreant Developers. See LICENSE.txt for further details.