The CILogon project facilitates secure access to CyberInfrastructure (CI).

To log on to the CILogon Service, visit

Services that support access via CILogon include:

CILogon is a research and scholarship service provider in the InCommon federation.

CILogon is an open source project, with source code and downloads hosted at SourceForge.

To cite CILogon in publications, please use:

Jim Basney, Terry Fleury, and Jeff Gaynor, "CILogon: A Federated X.509 Certification Authority for CyberInfrastructure Logon," Concurrency and Computation: Practice and Experience, Volume 26, Issue 13, pages 2225-2239, September 2014.

For more information, please see our Frequently Asked Questions or contact

Latest News

  • Growing Support for SAML ECP Recently, the InCommon identity providers (IdPs) at Clemson University and University of Utah enabled support for SAML ECP ("Enhanced Client or Proxy"), which allows for the exchange of SAML attributes ...
    Posted Mar 11, 2015, 11:10 AM by Jim Basney
  • CILogon Passes XSEDE Acceptance Test XSEDE Operations completed acceptance testing of CILogon on January 5 2015 and accepted CILogon for production. Please see for details about how XSEDE uses CILogon ...
    Posted Jan 6, 2015, 2:00 PM by Jim Basney
  • SSLv3 disabled on In response to the SSLv3 POODLE vulnerability, we have disabled support for SSLv3 at TLS is now required for access. We do not see any recent use ...
    Posted Oct 15, 2014, 7:59 AM by Jim Basney
Showing posts 1 - 3 of 81. View more »

Subscribe to an RSS feed of CILogon news

This material is based upon work supported by the National Science Foundation under grant numbers 0850557, 0943633, 1053575, 1440609, and 1547268 and by the Department of Energy under award number DE-SC0008597.
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the United States Government or any agency thereof.
The CILogon project is sometimes referred to as CILogin, but the official name is CILogon.