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User Identification (User ID)

Definition - What does User Identification (User ID) mean?

User identification (user ID) is a logical entity used to identify a user on a software, system, website or within any generic IT environment. It is used within any IT enabled system to identify and distinguish between the users who access or use it.

A user ID may also be termed as username or user identifier.

Techopedia explains User Identification (User ID)

User ID is one of the most common authentication mechanisms used within computing systems, networks, applications and over the Internet. Regardless of the type of user and the user's rights, each user has a unique identification that distinguishes it from other users. Typically in an authentication process, user ID is used in conjunction with a password. The end-user must provide both of the credentials correctly to gain access to the system or application. Moreover, system administrators use user IDs to assign rights, track user activity and manage overall operations on a particular system, network or application.

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