Keyparc identifies you with your valid sign on of Keyparc or any of single-sign-on service provided by Google, Yahoo! and Windows Live. Your user ID and password for the domain are submitted from your local Keyparc application or web browser directly to the domain ID service without going through Keyparc server. On successful authentication of your identity by your domain provider, a single-sign-on token is returned to your Keyparc application.
Keyparc application then sends over the single-sign-on token to Keyparc server for validation of your identity, once you are trusted and identified, you are granted the permission to retrieve your key(s).