(also UUID, globally unique identifier)
A universally unique identifier (UUID) is a 128-bit number that an algorithm generates, and it identifies unique data. It typically consists of five groups of hexadecimal numbers separated by hyphens in the form of 123e4567-e89b-12d3-a456-426655440000. The values of the UUID rely on the device’s network address and refer to the network address, a time stamp, and an arbitrary component. This combination makes each UUID unique. UUIDs have various purposes in computer systems, including database keys, file systems, distributed systems, and web applications. Although it is challenging to predict the universally unique identifier, it is still vulnerable to hacking and manipulation, which can happen because of a hash collision or if hackers utilize different tools to guess the finite size of the UUID.
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