This defines the area where uniqueness is guaranteed, such as a single database (local scope) or a global network (global scope). Common Types and Generation Methods
The identifier remains attached to the entity for its entire lifecycle, regardless of changes to other attributes like name or email.
These use algorithms like SHA-256 to turn sensitive data (like an email address) into a fixed-length unique string without exposing the original information.
No two entities share the same code within a specific boundary, preventing identity overlaps.
UIDs are generated through various strategies depending on the scale and security needs of the application:
UIDs are foundational to modern infrastructure across various sectors: What Is a Unique Identifier (UID), and Why Is It Important?
Simplest form where numbers are assigned sequentially (e.g., 001, 002). These are easy to manage but highly predictable, posing security risks in public-facing systems.
