What is 5G-GUTI (5G globally unique temporary identifier)?

5G GUTI is Globally unique temporary identifier which is a core network temporary identifier. GUTI is allocated to User equipment by AMF ( Access and Mobility management function). The composition of GUTI contains an 80 bits long code network identifier which consists of three major network identifiers PLMN (Public land mobile network)), AMF ID and TMSI (Temporary Mobile Subscriber Identity). Single 5G-GUTI can be used to access both 3GPP and non 3GPP technologies’ security context within the AMF.