This method may only be issued to a Border Router (supporting the operation described in Step 3 of [FANTPS] section 6.5.2.5 Revocation of Node Access). The Border Router destroys all group keys (GTKs or LGTKs) except the currently active group key, modifies the lifetime of the currently active group key to be (lifetime / REVOCATION_LIFETIME_REDUCTION), and installs the new group key provided by this API method. The GroupTransientKey object indicates the type of group keys (GTK or LGTK) upon which this method acts.