Question

Consider radix-64 conversion as a form of encryption. In this case, there is no key. But suppose that an opponent knew only that some form of substitution algorithm was being used to encrypt English text and did not guess that it was R64. How effective would this algorithm be against cryptanalysis?

Answer 1

tex

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an opponent knew only that some form of substitution algorithm was being used to encrypt English text and did not guess that it was R64.