name: UID
full_form: User Identity
context: 6.3.1.2.3.1 General To secure communications with a specific user, the initiator composes the IDENTITY User ID (UID) to which the message will be encrypted. It is intended that the format of the UID should be defined by the KMS. As a result, there is flexibility on the choice of UID depending on the requirements of the specific user group. The only constraint is that UID is well-defined and derived by the initiator of the communication unambiguously. For example, for IMS communications, the UID is likely to contain the user's IMPU (e.g. alice@domain.com), or in other contexts, perhaps the MSISDN. However, for most domains, the UID used for IDENTITY communications will also contain a reference to the current year, and perhaps also the current month or week within the year. This defines the length of time a particular UID is used, and also the key period for the key associated with the User ID. The format for the UID for users within a domain is specified within the KMS public
description: A critical network attribute used to identify a specific user in telecommunications, particularly in secure communications and encryption processes.
explanation: The text states that UID is used for secure communications with a specific user, implying its function as an identifier or parameter within the network.
section_title: 6.3.1.2.3	Use of User IDs within IDENTITY
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