All of the following are part of a Federated Identity System except?

In a Federated Identity System, the core components typically include an Identity Provider (IdP), which is responsible for authenticating users and providing identity data, and a Relying Party (RP), which is the service or application that relies on the authentication conducted by the IdP. The User refers to the individual who seeks access to the Relying Party's services.

The term "Relaying Party," on the other hand, is not a standard component in Federated Identity Systems. This is because the correct terminology used in this context is "Relying Party." The inclusion of a 'Relaying Party' instead of a 'Relying Party' leads to confusion as these terms do not refer to the same functional entity within the system.

Thus, the correct answer identifies the term that is not a recognized part of the Federated Identity System framework, while all the other options represent essential roles or parties involved in facilitating identity federations.