How UUID identifiers are generated and what can be inferred from them?

In this article, the author delves into the topic of UUIDs, which stands for Universally Unique Identifiers, widely used across systems and applications. The main goal of UUIDs is to provide global uniqueness, ensuring that each identifier is distinct from others. The author discusses various methods of generating UUIDs, specifically versions 1, 3, 4, and 5, highlighting the key differences between them. Particular attention is given to version 4, which generates identifiers randomly, making them extremely difficult to predict. The article also analyzes the use cases of UUIDs in databases, distributed systems, and web applications. Finally, it summarizes why UUIDs have become so popular and the benefits they bring in the context of modern technologies.