name: EESE
full_form: End to End Security Endpoint
context: In order to ensure that both the UE and the EESE have the same keys and do the key derivation at the same time, it is necessary to trigger the key derivation. In this solution, the key derivation trigger is exchanged over the existing connection as a control message. What happens is as follows: 1. Upon deriving a e2eKEYSET a timer te2e is set in the EESE. 2. Whenever the timer runs out, the EESE sets a flag invalidating the keys. 3. Upon next contact from the UE, the EESE replies with an error message indicating the reason (key has expired). This step is skipped whenever the EESE triggers new contact. 4. The EESE generates a fresh RAND (or triggers the EMKS that a new RAND is needed), derives the new e2eKEYSET and forwards the RAND to the UE, which derives the new e2eKEYSET. 5. The UE or EESE transmit the message.
description: The End-to-End Security Endpoint (EESE) is a network function responsible for managing end-to-end security in telecommunications. It specifically handles key derivation and exchange between the User Equipment (UE) and itself.
explanation: The EESE is classified as a Network Function because it controls and manages security within the network. Its responsibilities include triggering key derivation, exchanging control messages, and deriving new keys.
section_title: 6.5.2.3	Triggering the key derivation
biotag_Context: O,O,O,O,O,O,O,B-Device,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Network Function,O,O,O,O,O,B-Network Function,O,O,O,B-Parameter,O,O,O,B-Network Function,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,B-Parameter,O,O,O,O,O,O,O,O,O,O,B-Device,O,B-Network Function,O,O,O
biotag_Description: O,B-Miscellaneous,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,O,B-Device,I-Device,O,O,O