Techniques for generating and maintaining an identifier (112) of a user equipment (UE) (102) are presented. For instance, the disclosure presents an example method (200) executed by a radio access network (RAN) node for providing a UE (102) with an identifier (112). This example method (200) can include, for example, generating the identifier (112) for the UE (102), where the identifier (112) includes RAN node identity information, a timestamp indicating a time at which the identifier is generated by the RAN node (106), and/or integrity information from which the identifier (112) is verifiable. In addition, the example method (200) can include adding the identifier (112) to an information container (110) corresponding to the UE (102) and forwarding the information container (110) including the identifier (112) to a core network node (108). Related RAN node (106) and core network node (108) devices are also presented, as well as example computer programs, systems, and techniques for generating and maintaining an identifier (112) for a UE (102).