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Commitb277253

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add implementing affine cipher tutorial
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‎README.md‎

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@@ -51,6 +51,7 @@ This is a repository of all the tutorials of [The Python Code](https://www.thepy
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-[How to Crack the Caesar Cipher in Python](https://thepythoncode.com/article/how-to-crack-caesar-cipher-in-python). ([code](ethical-hacking/caesar-cipher))
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-[How to Lock PDFs in Python](https://thepythoncode.com/article/lock-pdfs-in-python).[(code)](ethical-hacking/pdf-locker)
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-[How to Create a Custom Wordlist in Python](https://thepythoncode.com/article/make-a-wordlist-generator-in-python). ([code](ethical-hacking/bruteforce-wordlist-generator))
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-[How to Implement the Affine Cipher in Python](https://thepythoncode.com/article/how-to-implement-affine-cipher-in-python). ([code](ethical-hacking/implement-affine-cipher))
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-###[Machine Learning](https://www.thepythoncode.com/topic/machine-learning)
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-###[Natural Language Processing](https://www.thepythoncode.com/topic/nlp)
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#[How to Implement the Affine Cipher in Python](https://thepythoncode.com/article/how-to-implement-affine-cipher-in-python)
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# Import necessary libraries.
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importstring
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fromcoloramaimportinit,Fore
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# Initialise colorama.
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init()
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# Function to perform Affine Cipher encryption.
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defaffine_encryption(plaintext,a,b):
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# Define the uppercase alphabet.
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alphabet=string.ascii_uppercase
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# Get the length of the alphabet
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m=len(alphabet)
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# Initialize an empty string to store the ciphertext.
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ciphertext=''
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# Iterate through each character in the plaintext.
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forcharinplaintext:
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# Check if the character is in the alphabet.
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ifcharinalphabet:
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# If it's an alphabet letter, encrypt it.
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# Find the index of the character in the alphabet.
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p=alphabet.index(char)
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# Apply the encryption formula: (a * p + b) mod m.
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c= (a*p+b)%m
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# Append the encrypted character to the ciphertext.
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ciphertext+=alphabet[c]
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else:
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# If the character is not in the alphabet, keep it unchanged.
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ciphertext+=char
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# Return the encrypted ciphertext.
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returnciphertext
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# Define the plaintext and key components.
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plaintext=input(f"{Fore.GREEN}[?] Enter text to encrypt: ")
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a=3
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b=10
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# Call the affine_encrypt function with the specified parameters.
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encrypted_text=affine_encryption(plaintext,a,b)
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# Print the original plaintext, the key components, and the encrypted text.
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print(f"{Fore.MAGENTA}[+] Plaintext:{plaintext}")
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print(f"{Fore.GREEN}[+] Encrypted Text:{encrypted_text}")
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colorama

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