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I think I understand what you're asking now. ChaCha is essentially a block cipher with no key schedule. This has an advantage, less SRAM required for constrained devices, and even for desktops, less cache calls ( https://stackoverflow.com/questions/10274355/cycles-cost-for-l1-cache-hit-vs-register-on-x86 ). Part of the reason why ChaCha manages to be as ...

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