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10

No, this won't provide any improvement for encryption with any decent cipher. If a cipher is so bad that a known-plaintext attack is capable of fatally breaking it, then the cipher is worthless. A known-plaintext attack is one where an attacker has knowledge of plaintext/ciphertext pairs and, from that knowledge, is able to either calculate the key or ...


1

There are two ways you can do this. First is to split the byte into two 4 bit numbers. If the 4-bit number is above 9, discard it. You can get up to 2 digits per byte this way. Another way you could do this is if it is under 200, take the last two digits. Then you have 2 random digits. If it's under 250, take the last digit. If it's above 250, discard it. ...


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