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What you described is to use a so-called "stram cipher". Stream ciphers output a random sequence of bytes for the same Key/IV pair. The usual usage of stream ciphers is to XOR the data with the stream to obtain the encrypted data. You may want to follow the same approach by replacing the LSBs by the bits that were output by the encryption procedure (Data ...


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The below is assuming a natural language is the one that has sentences from a well defined dictionary for that language (ex: oxford dictionary for english ). We can do this with the standard approach for FPE i.e $rank-encrypt-derank$. Build a $key-value$ pair map of all the words in the language of preference Where $key$ is the number and $value$ is the ...



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