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Commit 1319e69

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Merge pull request #196 from a6ar55/main
Message encryption with cryptographic hashing algorithm
2 parents a8a7009 + e299bce commit 1319e69

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# Message Encryption Project
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## Overview
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This is a Python project that allows users to encrypt messages with different levels of confidentiality using a variety of encryption techniques and hashing algorithms.
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## Features
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- **Caesar Cipher Encryption:** Messages can be encrypted using the Caesar cipher, a simple substitution cipher, with different shifts based on the user's specified confidentiality level.
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- **Hashing Algorithms:** For higher levels of confidentiality, the project uses different hashing algorithms, such as SHA-256, SHA3-256, and SHA-512, to secure the message.
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## Requirements
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- Python 3.x
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- Python libraries: hashlib (for hashing), cryptography (for symmetric encryption)
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import hashlib
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def get_confidentiality_level():
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while True:
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try:
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level = int(input("Enter the confidentiality level (1-10): "))
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if 1 <= level <= 10:
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return level
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else:
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print("Confidentiality level must be between 1 and 10.")
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except ValueError:
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print("Please enter a valid integer between 1 and 10.")
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def caesar_cipher_encrypt(message, shift):
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encrypted_message = ""
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for char in message:
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if char.isalpha():
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if char.islower():
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encrypted_message += chr((ord(char) - ord('a') + shift) % 26 + ord('a'))
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elif char.isupper():
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encrypted_message += chr((ord(char) - ord('A') + shift) % 26 + ord('A'))
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else:
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encrypted_message += char
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return encrypted_message, "Caesar Cipher"
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def encrypt_message(message, confidentiality_level):
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if 1 <= confidentiality_level <= 2:
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# Caesar cipher with a shift of 1 for low confidentiality
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shift = 1
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encrypted_message, method = caesar_cipher_encrypt(message, shift)
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else:
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# Choose a suitable hashing algorithm based on the level
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if 2 <= confidentiality_level <= 4:
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hash_algorithm = hashlib.sha256
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elif 4 < confidentiality_level <= 6:
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hash_algorithm = hashlib.sha384
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elif 6 < confidentiality_level <= 8:
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hash_algorithm = hashlib.sha3_256
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else:
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hash_algorithm = hashlib.sha512
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# Hashing the message
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hashed_message = hash_algorithm(message.encode()).hexdigest()
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encrypted_message, method = hashed_message, hash_algorithm.__name__
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return encrypted_message, method
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def main():
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message = input("Enter the message to be encrypted: ")
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confidentiality_level = get_confidentiality_level()
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encrypted_message, method = encrypt_message(message, confidentiality_level)
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print(f"Encrypted message: {encrypted_message}")
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print(f"Encryption method used: {method}")
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if __name__ == "__main__":
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main()

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