In an embodiment, a security engine of a processor includes an identity provider logic to generate a first key pair of a key pairing associating system user and a service provider that provides a web service and having a second system coupled to the system via a network, to perform a secure communication with the second system to enable the second system to verify that the identity provider logic is executing in a trusted execution environment, and responsive to the verification, to send a first key of the first key pair to the second system. This key may enable the second system to verify an assertion communicated by the identity provider logic that the user has been authenticated to the system according to a multi-factor authentication. Other embodiments are described and claimed.