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Unique identifier. A unique identifier ( UID) is an identifier that is guaranteed to be unique among all identifiers used for those objects and for a specific purpose. [1] The concept was formalized early in the development of computer science and information systems. In general, it was associated with an atomic data type .
Single sign-on (SSO) is an authentication scheme that allows a user to log in with a single ID to any of several related, yet independent, software systems.. True single sign-on allows the user to log in once and access services without re-entering authentication factors.
User identifier. Unix-like operating systems identify a user by a value called a user identifier, often abbreviated to user ID or UID. The UID, along with the group identifier (GID) and other access control criteria, is used to determine which system resources a user can access. The password file maps textual user names to UIDs.
Universally unique identifier. A Universally Unique Identifier ( UUID) is a 128-bit label used for information in computer systems. The term Globally Unique Identifier ( GUID) is also used, mostly in Microsoft systems. [1] [2] When generated according to the standard methods, UUIDs are, for practical purposes, unique.
A unique user is a term used in web analytics which refers to a website visitor that is counted only once, regardless of the number of pages they visit. This definition does not count repeat or returning users for a certain period of time and is typically determined by placing a cookie on user's device. [1] A website's number of unique users is ...
Identity correlation is, in information systems, a process that reconciles and validates the proper ownership of disparate user account login IDs ( user names) that reside on systems and applications throughout an organization and can permanently link ownership of those user account login IDs to particular individuals by assigning a unique ...
Personal Identifiers ( PID) are a subset of personally identifiable information (PII) data elements, which identify an individual and can permit another person to "assume" that individual's identity without their knowledge or consent. [1] PIIs include direct identifiers (name, social security number) and indirect identifiers (race, ethnicity, age).
Federated identity. A federated identity in information technology is the means of linking a person's electronic identity and attributes, stored across multiple distinct identity management systems. [1] Federated identity is related to single sign-on (SSO), in which a user's single authentication ticket, or token, is trusted across multiple IT ...