[Crucible Knowledge Base]
A 'trusted application' is an application that Crucible will allow to access specific functions in Crucible on behalf of any user, without the user logging in to Crucible. You can configure Trusted Applications authentication between FishEye, Crucible, JIRA (3.12 and later) and Confluence (2.7 and later).
Using the bundled Application Links plugin, you can configure application links with Trusted Applications authentication as well as other types of authentication.
For further instructions, please see Configuring Application Links.