name: LTKUP
full_form: Long Term Key Update Procedure
context: the re- synchronisation of the Long Term Keys making the USIM unusable. 7.4.2 Threat Description Due to either: - An error in the implementation of the LTKUP procedures. - Loss of network coverage. - The LTKUP procedures being re-run before the previous LTKUP procedure completes. - An attack on the LTKUP procedure that corrupts the LTKUP process. The USIM and the Network version of the same Long Term Key may be different. If this occurs, then the user is unlikely to get any network service (other than emergency calls) and may have no way to remedy the situation without replacing the USIM. 7.4.3 Potential Security requirements The LTKUP procedure shall mitigate against loss of telecoms service due to corruption of the LTKUP process. The LTKUP process shall mitigate against loss of telecoms service due to the LTKUP procedures being run several times in parallel. The LTKUP process shall be tolerant to losses of network service during the LTKUP process. The LTKUP process shall have
description: The Long Term Key Update Procedure (LTKUP) is a security protocol designed to update long-term keys between the USIM and the Network, ensuring secure communication and mitigating potential threats that could lead to loss of telecom service.
explanation: Given the context from 3GPP TS 33.834, section 7.3.3, LTKUP is described as a procedure aimed at re-synchronizing long-term keys and preventing corruption of the key update process. This aligns with the definition of a Procedure in the provided categories.
section_title: 7.3.3	Security requirements
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