FolderCryptor

FolderCryptor is a PowerShell-based tool for encrypting and decrypting folder contents. It supports multi-layer encryption, allowing users to apply multiple levels of encryption to a file and decrypt in reverse order. This tool uses AES-256 encryption to ensure data security, making it ideal for sensitive information storage.

Features

• AES-256 Encryption: Ensures robust security using a password-based AES key.
• Multi-layer Encryption: Supports multiple encryption layers, allowing flexibility in file security.
• Simple Interface: Easy-to-use script with straightforward prompts for encryption and decryption.
• Filename Modification: Automatically manages .enc extensions to reflect encryption level.

Requirements

• PowerShell 5.1 or newer
• Windows OS (tested on Windows 10 and 11)

Installation

1. Clone the repository:

   git clone https://github.com/2171001/FolderCryptor.git

2. Navigate to the project directory:

   cd FolderCryptor

Usage

1. Open PowerShell and navigate to the directory containing the script:

   cd path\to\FolderCryptor

2. Run the script:

   .\FolderCryptor.ps1

3. Enter Password: Provide a password that will be used for both encryption and decryption.
4. Choose an Action:

• Type 1 to encrypt the folder contents.
• Type 2 to decrypt the folder contents.

Examples

First-time Encryption

When running the script for the first time and selecting encryption:

• file.txt → file.txt.enc

Multi-layer Encryption

Running the script and selecting encryption again:

• file.txt.enc → file.txt.enc.enc

Decryption Steps

Each decryption removes one .enc layer until the file is restored:

• file.txt.enc.enc → file.txt.enc
• file.txt.enc → file.txt

Notes

• The encryption key is derived from the provided password using SHA-256 hashing.
• Make sure to use the same password for encryption and decryption to avoid errors.
• Avoid re-encrypting decrypted files without a backup, as decryption with an incorrect password will fail.

Troubleshooting

• Invalid Key Size: Ensure your PowerShell environment supports AES-256.
• Padding Error: If you see a "Padding is invalid" error, the password may not match the one used for encryption.

Contributing

• Contributions are welcome! Feel free to open an issue or submit a pull request with improvements, bug fixes, or new features.