Patent 7603700 was granted and assigned to aol (company) on October, 2009 by the United States Patent and Trademark Office.
Techniques are provided for improving security in a single-sign-on context by providing, to a user's client system, two linked authentication credentials in separate logical communication sessions and requiring that both credentials be presented to a host system. Only after presentation of both credentials is the user authenticated and permitted to access applications on the host system.