Hacking Secret Ciphers with Python
Chapter 15 – The Affine Cipher 221 To encrypt it, we need to calculate the index of the encrypted letter. We multiply this symIn ...
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else: plaintext += symbol # just ...
Chapter 15 – The Affine Cipher 223 The if statement on line 75 checks to make sure that keyA is relatively prime with the size o ...
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Source code for affineKeyTest.py ...
Chapter 15 – The Affine Cipher 225 Look carefully at the output. You’ll notice that the ciphertext for Key A of 2 is the exact s ...
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HACKING THE AFFINE CIPHER Topics ...
Chapter 16 – Hacking the Affine Cipher 227 def main(): You might want to copy & paste this text from the source code at ...
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if response.strip().upper().star ...
Chapter 16 – Hacking the Affine Cipher 229 SILENT_MODE = False Our affine cipher hacking program fits in 60 lines of code beca ...
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The Affine Cipher Hacking Functio ...
Chapter 16 – Hacking the Affine Cipher 231 ...is the same as: len(affineCipher.SYMBOLS) * len(affineCipher.SYMBOLS) We multiply ...
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This is pretty obvious. The for l ...
Chapter 16 – Hacking the Affine Cipher 233 The message is then decrypted with the key by calling decryptMessage(). If SILENT_MOD ...
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key without finding the correct k ...
Chapter 17 – The Simple Substitution Cipher 235 THE SIMPLE SUBSTITUTION CIPHER Topics Covered In This Chapter: The sort() list ...
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The transposition and affine ciph ...
Chapter 17 – The Simple Substitution Cipher 237 Source Code of the Simple Substitution Cipher Open a new file editor window by c ...
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if keyList != lettersList: sy ...
Chapter 17 – The Simple Substitution Cipher 239 Sample Run of the Simple Substitution Cipher Program When you run this program, ...
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The first few lines are comments ...
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