UUID
A 128-bit identifier that is practically guaranteed to be unique.
What is UUID?
A UUID (Universally Unique Identifier) is a 128-bit value, usually shown as 32 hexadecimal digits in five hyphen-separated groups, designed to be unique without a central authority. It is used as a database key, request ID, or file name where collisions must be avoided across systems. Several versions exist, with random version 4 being the most common for general use.