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Encrypt and decrypt secret messages using the classic Caesar shift cipher with custom key shifts and brute-force 25-shift crack previews.
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The Caesar cipher is one of history's earliest substitution ciphers, famously used by Julius Caesar to protect military communications by shifting alphabet characters.
ROT13 is a special Caesar cipher with a shift key of 13. Because the English alphabet has 26 letters, applying ROT13 twice restores the original text.
No. With only 25 possible shift keys, a computer or person can brute-force test every combination in less than a second.
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