Encrypting Files with OpenSSL: A Step-by-Step Guide to AES-256-CBC Encryption

This method is very useful when you want to protect your files. We use the OpenSSL command-line tool for encryption. `-aes-256` stands for Advanced Encryption Standard with a 256-bit symmetric encryption algorithm, used for both encryption and decryption. The `-cbc` option specifies Cipher Block Chaining, which enhances security by ensuring that identical plaintext blocks produce different ciphertext blocks. The `-salt` option adds a random value to the plaintext to increase encryption strength.

Encrypt the file and convert it to a `.dat` file:
sudo apt install openssl

Decrypt the `.dat` file and restore it to its original state:

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