Key can mean different things in different contexts. In a substitution cipher, the key is the mapping. In modern ciphers, the key would be some set of secret bytes. Everyone agrees that this cipher would be a bad way to encrypt/encode something. But using the word cipher like this has real historical meaning, and that is the meaning that is being used in the project.
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Key can mean different things in different contexts. In a substitution cipher, the key is the mapping. In modern ciphers, the key would be some set of secret bytes. Everyone agrees that this cipher would be a bad way to encrypt/encode something. But using the word cipher like this has real historical meaning, and that is the meaning that is being used in the project.