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Hash functions are incredibly beautiful mathematical objects. They can map arbitrary data to a small range of fixed-size output data in such a way that the mapping is deterministic, yet appears random. This "deterministic randomness" is incredibly useful for a wide range of applications, such as hash tables, checksums, Monte Carlo algorithms, distributed algorithms without communication, and so on.

Modern gadgets are unimaginable without AI functions. But they come at a cost that the end consumer has to "pay", including faster battery drain and device overheating. As a result, electronics manufacturers face a dilemma: features are needed, many of them, but without significant damage to the battery.