Cosign at U-M

Planning a Move Away from Cosign

The university is moving away from the use of Cosign authentication and toward more modern, flexible, supportable alternatives, such as Shibboleth. Once widely used across higher education, Cosign is now used by only a handful of universities, and the open source community that once developed and maintained it has dwindled.

If you are considering using Cosign for a new app or service, please consider using Shibboleth instead.

If your service currently uses Cosign, please be reassured that you will be given plenty of time and support to make the transition to something else. The university has not yet set a date for retiring Cosign.

A Careful Transition

There are more than 600 services at U-M that use Cosign authentication, so moving away from Cosign will take time and a lot of collaboration. ITS will work with people across the university to develop transition plans that minimize disruption and respect unit and university needs. If you'd like to work with us on this important effort or provide input, please send email to