libotr5 - Off-the-Record Messaging library

Distribution: Debian 8 (Jessie)
Repository: Debian Main i386
Package name: libotr5
Package version: 4.1.0
Package release: 2+deb8u1
Package architecture: i386
Package type: deb
Installed size: 215 B
Download size: 87.68 KB
Official Mirror:
OTR allows you to have private conversations over IM by providing: - Encryption - No one else can read your instant messages. - Authentication - You are assured the correspondent is who you think it is. - Deniability - The messages you send do not have digital signatures that are checkable by a third party. Anyone can forge messages after a conversation to make them look like they came from you. However, during a conversation, your correspondent is assured the messages they see are authentic and unmodified. - Perfect forward secrecy - If you lose control of your private keys, no previous conversation is compromised. This package provides the OTR library.



    Source package: libotr

    Install Howto

    1. Update the package index:
      # sudo apt-get update
    2. Install libotr5 deb package:
      # sudo apt-get install libotr5


    • /usr/lib/
    • /usr/lib/
    • /usr/share/doc/libotr5/Protocol-v3.html
    • /usr/share/doc/libotr5/README.gz
    • /usr/share/doc/libotr5/UPGRADING.gz
    • /usr/share/doc/libotr5/changelog.Debian.gz
    • /usr/share/doc/libotr5/changelog.gz
    • /usr/share/doc/libotr5/copyright


    2016-03-07 - Salvatore Bonaccorso <> libotr (4.1.0-2+deb8u1) jessie-security; urgency=high * Non-maintainer upload by the Security Team. * CVE-2016-2851: Integer overflow on 64-bit architectures when receiving 4GB messages

    2014-11-01 - intrigeri <> libotr (4.1.0-2) unstable; urgency=medium * New patch: 0001-Do-not-error-out-when-an-application-is-run-against-.patch Do not error out when an application is run against an older libotr than the one it was built against: given libotr 4.1 is API- and ABI-compatible with libotr 4.0, let's prevent this runtime check from breaking packages that were built against 4.0 (Closes: #767230). * Add symbols file: now that we have removed upstream's version check at runtime, let's use the symbols mechanism to detect (most) ABI changes automatically, and let reverse-dependencies pick up the version of libotr they should depend on (Closes: #767652). * debian/README.source: document how to detect and handle ABI changes.

    2014-10-21 - intrigeri <> libotr (4.1.0-1) unstable; urgency=medium * New upstream release. * Drop all patches: applied upstream. * Migrate back to source format 3.0 (quilt), as per new team policy. * Drop unsupported italics from extended description. (Closes: #747271) * Import upstream signing key where uscan looks for it. * debian/watch: enable OpenPGP signature verification. * Declare compliance with Standards-Version 3.9.6 (no change required). * Use cgit for the Vcs-Browser control field. * Reformat debian/control with cme fix.

    2014-02-18 - intrigeri <> libotr (4.0.0-3) unstable; urgency=medium * Put the package under the umbrella of the Debian OTR Team. Huge thanks to Thibaut VARENE <> for having maintained this package for many years! * Add Micah and myself as human uploaders. * Migrate back to source format 1.0. Accordingly integrate debian/patches/message_fragment_fix.patch in the tree: cherry-pick upstream commit d748757e. * Convert debian/copyright to machine-readable copyright format 1.0, update it. * Cleanup debian/control with cme, including: drop versioned dependencies satisfied in oldstable (Squeeze). * Declare compatibility with standards version 3.9.5. * Slightly improve long package descriptions, make it gender-neutral. * Update Homepage control field. * Convert to debhelper 8 with tiny rules file and dh-autoreconf. * Create copyright symlinks with dh_link instead of the real links, that are not supported with source format 1.0. * Override direct-changes-in-diff-but-no-patch-system Lintian warning: our team uses source format 1.0; the detail of patches can be found in Git and debian/changelog. * Enable all hardening flags. * Add Vcs-* control fields. * Update debian/watch to use the new HTTPS homepage. * Add README.source.

    2013-05-10 - Micah Anderson <> libotr (4.0.0-2.2) unstable; urgency=low * Non-maintainer upload * Upload experimental version to unstable * Bump standards version: no changes

    2013-03-09 - Micah Anderson <> libotr (4.0.0-2.1) experimental; urgency=low * Non-maintainer upload. * Add message_fragment_fix.patch (Closes: #698746)

    2012-10-06 - Thibaut VARENE <> libotr (4.0.0-2) unstable; urgency=low * Remove Conflicts with libotr2 (Closes: #689667)

    2012-09-29 - Thibaut VARENE <> libotr (4.0.0-1) unstable; urgency=low * New upstream release, upload to unstable

    2012-08-28 - Thibaut VARENE <> libotr (4.0.0~rc3-1) experimental; urgency=low * New upstream pre-release

    2012-08-24 - Thibaut VARENE <> libotr (4.0.0~rc1-1) experimental; urgency=low * New upstream pre-release (Closes: #685664)