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Developer(s) LSE Leading Security Experts GmbH
Initial release March 1, 2010 (2010-03-01)
Stable release 2.7 / May 21, 2014; 3 months ago (2014-05-21)
Development status active
Written in Python
Operating system Linux
Available in English, German
Type OTP Authentication server
License AGPL

LinOTP is a Linux-based solution to manage authentication devices for two-factor authentication with one time passwords. It is implemented as a web service based on the python framework Pylons. Thus it requires a web server to run in.

LinOTP is mainly developed by the German company LSE Leading Security Experts GmbH. Its core components are licensed under the Affero General Public License.

It is an open source authentication server certified[1] by the OATH initiative for open authentication for its 2.4 version.


As a web service LinOTP provides a REST-like web API.[2] All functions can be accessed via Pylons controllers. Responses are returned as a JSON object.

LinOTP is designed in a modular way enabling user store modules and token modules. Thus it is capable of supporting a wide range of different tokens.


  • Supported tokens:[3]
  • Yubikey mass enrollment via CLI
  • support for token databases like sqlite, mysql, postgresql, oracle, db2
  • management via web interface or command line client
  • Users stored in flat files
  • PAM module
  • SAML
  • OpenID
  • FreeRADIUS connection via rlm_perl
  • Selfservice
  • Import of XML Token files
  • Management functions:
  • enroll/assign tokens
  • synchronize, resynchronize, automatic resychronization
  • activate/deactivate/delete tokens
  • autoassignment
  • lost token scenario
  • find token by OTP value
  • get OTP value
  • Detailed Policies Definitions
  • Sophisticated Audit API
  • Multitenancy

Source Code[edit]

Being written in Python the program itself comes as the source code. The code is available via the Python Package Index PyPI or from the project website

The source code can be obtained from GitHub: LinOTP repository.

See also[edit]


  1. ^ "OATH certified authentication server". Initiative for open authentication. Retrieved 20 May 2013. 
  2. ^ "LinOTP API". LinOTP. Retrieved 14 Nov 2013. 
  3. ^ "LinOTP Features". LinOTP. Retrieved 20 May 2013.