CoSign single sign on
CoSign is an open-source project originally designed to provide the University of Michigan with a secure single sign-on web authentication system.
CoSign authenticates users on the web server and then provides an environment variable for the users' name. When the users access a part of the site that requires authentication, the presence of that variable allows access without having to sign-on again.
Cosign is part of the National Science Foundation Middleware Initiative (NMI) EDIT software release.
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