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Exclusive-OR encryption, while not a public-key system such as RSA, is
almost unbreakable through brute force methods. It is susceptible to
patterns, but this weakness can be avoided through first compressing the
file (so as to remove patterns). Exclusive-or encryption requires that
both encryptor and decryptor have access to the encryption key, but the
encryption algorithm, while extremely simple, is nearly unbreakable. Exclusive-OR encryption works by using the boolean algebra function
exclusive-OR (XOR). XOR is a binary operator (meaning that it takes two
arguments - similar to the addition sign, for example). By its name,
exclusive-OR, it is easy to infer (correctly, no less) that it will
return true if one, and only one, of the two operators is true. The
truth table is as follows: more...
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