How to decrypt the file?

To decrypt a file that was encrypted using OpenSSL with AES-256-CBC, you can use the following command:

openssl enc -d -aes-256-cbc -in secret.enc -out decrypted.txt -pbkdf2

Breakdown of the Command:

openssl enc: Invokes the OpenSSL encryption function.
-d: Indicates that you want to decrypt the file.
-aes-256-cbc: Specifies the encryption method used during encryption.
-in secret.enc: Names the input file that contains the encrypted data.
-out decrypted.txt: Specifies the output file where the decrypted plaintext will be saved.
-pbkdf2: Uses the same secure key derivation method as during encryption.

Steps to Decrypt:

Open your terminal and navigate to the directory containing the encrypted file:
```
cd ~/project
```
Run the decryption command provided above. You will be prompted to enter the password that was used during encryption. Make sure to enter it exactly as it was originally set.
Verify the Decryption: After running the command, you can check if the decryption was successful by viewing the contents of the decrypted file:
```
cat decrypted.txt
```

If the decryption was successful, you should see the original plaintext message that was encrypted.

Important Note

Always ensure that you keep your passwords secure and do not share them, as they are crucial for accessing your encrypted data. If you have any further questions or need assistance, feel free to ask!