Python File Encryption Dictionaries Files and Exception

In this tutorial, we will explore how to perform file encryption in Python using dictionaries for key management, file handling for input and output, and exception handling for error management. We will use the Advanced Encryption Standard (AES) algorithm, a widely-used symmetric encryption algorithm, and the cryptography library for implementation.
Before you begin, make sure you have the cryptography library installed. You can install it using the following command:
In this example, the key_derivation function generates a key based on the user-provided password and a randomly generated salt using the PBKDF2HMAC key derivation function. The encrypt_file function reads the plaintext file, encrypts it using AES in CFB mode, and saves the salt and ciphertext to a new file. The decrypt_file function reads the encrypted file, extracts the salt and ciphertext, generates the key, and decrypts the ciphertext to obtain the original plaintext.
Remember to handle exceptions appropriately to provide informative error messages and ensure a smooth user experience. This tutorial provides a basic example, and you may need to customize it based on your specific requirements and security considerations.
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