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Encrypts files or streams

mcrypt is a program for encrypting files or streams. It is intended to be a replacement for the old UNIX crypt. It uses well-known and well-tested algorithms like DES, BLOWFISH, TWOFISH, ARCFOUR, CAST-128, and more in several modes (CBC, CFB, etc.). It also has a compatibility mode with the old UNIX crypt and Solaris des. Some of the algorithms that mcrypt may use (like RC6 and IDEA) are not free in all countries. These algorithms are provided as extension modules to libmcrypt (the library which implements all the algorithms and modes found in mcrypt). Users should contact the companies listed in docs/README.nonfree, if you live in a country where is illegal to use them.


User manpage available in HTML format from


Download version 2.6.8 (stable)
released on 22 November 2008

VCS Checkout

password: anonymous



LicenseVerified byVerified onNotes
License:LGPLJanet Casey11 May 2001

Leaders and contributors

Nikos Mavroyanopoulos Maintainer

Resources and communication

AudienceResource typeURI
Bug Tracking,Developer,
DeveloperVCS Repository Webview

Software prerequisites

Required to buildlibmhash
Source requirementlibmhash
Required to uselibmhash (

This entry (in part or in whole) was last reviewed on 1 March 2017.


Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.3 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the page “GNU Free Documentation License”.

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