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A key generator is a protocol or algorithm that is used in many cryptographic protocols to generate a sequence with many pseudo-random characteristics. This sequence is used as an encryption key at one end of communication, and as a decryption key at the other. One can implement a key generator in a system that aims to generate, distribute, and authenticate keys in a way that without the private key, one cannot access the information in the public end.
Examples of key generators include linear-feedback shift registers and the Solitaire cipher. One of the common examples of key generators would be the bitcoin protocol in which SHA-256 and Secp256k1 algorithms used to ensure that funds can only be spent or moved by their rightful owners.
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