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48 lines
1.6 KiB
Markdown
48 lines
1.6 KiB
Markdown
# Challenge 1: Caesar Cipher Shift
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**Challenge Text:**
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```
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Sifnz ebjnt, zpv ibwf cffo difdlfe! Dpvme zpv efdszqujpo uijt tfdsfu nfttbhf?
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```
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**Instructions:**
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1. Analyze the frequency of the letters, or use a brute-force approach to find the shift value.
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2. Write a program or manually shift the letters to decrypt the message, applying the reverse shift.
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3. Provide the original text.
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### Answer:
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The Caesar cipher is a type of substitution cipher in which each character in the plaintext is 'shifted' a certain number of places down or up the alphabet. In this particular case, the shift value is 1.
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**Decrypted Text:**
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```
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Rhemy dakim, you have been checked! Could you decrypting this secret message?
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```
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You can also use these code examples in Python to decrypt the message:
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```python
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def decrypt_caesar(ciphertext, shift):
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decrypted = ""
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for char in ciphertext:
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if char.isalpha():
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shifted = ord(char) - shift
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if char.islower():
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if shifted < ord('a'):
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shifted += 26
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elif char.isupper():
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if shifted < ord('A'):
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shifted += 26
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decrypted += chr(shifted)
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else:
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decrypted += char
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return decrypted
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ciphertext = "Sifnz ebjnt, zpv ibwf cffo difdlfe! Dpvme zpv efdszqujpo uijt tfdsfu nfttbhf?"
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shift = 1
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decrypted_text = decrypt_caesar(ciphertext, shift)
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print(decrypted_text)
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```
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This challenge serves as a fun and educational introduction to the field of cryptography, allowing you to explore basic decryption techniques. Try the next challenge.
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