Windows CardSpace encountered an error when verifying the identity of the site and cannot continue. To close Windows CardSpace, click OK. To temporarily prevent Windows CardSpace from starting, click Disable.

- WSO2 IS allows users to sign up and sign in using Information cards issued by Windows cardspace. While signing up/signing in if you encounter following error, then you have to install the certificate in the browser.

Error : "Windows CardSpace encountered an error when verifying the identity of the site and cannot continue.  To close Windows CardSpace, click OK.  To temporarily prevent Windows CardSpace from starting, click Disable."