Section: 6.12.1 Subscription permanent identifier
Content: In the 5G system, the globally unique 5G subscription permanent identifier is called SUPI as defined in 3GPP TS 23.501[ System architecture for the 5G System (5GS) ]  [2]. The SUCI is a privacy preserving identifier containing the concealed SUPI. The SUPI is privacy protected over-the-air by using the SUCI which is described in clause 6.12.2. Handling of SUPI and privacy provisioning related to concealing the SUPI shall be done according to the requirements specified in clause 5 and details provided in clause 6.12.2.