This git project constitutes a file cloaking utility that provides password-based security of a single file or a single file system archive file (E.g. .tar.gz). The utility is probably most useful in the following situations:

• Storing backups of sensitive information on the Internet
• Transporting sensitive information electronically (E.g. email) or manually (E.g. using a flash drive)

This project is already proven running on an Intel/AMD environment (Biostar Celeron CPU motherboard) and the Raspberry Pi 2 (ARM 32-bit processor).

The source code is based on libgcrypt (GnuPG cryptography), using:

• Password-based Key Derivation Function version 2 (PBKDF2)
• AES data cryptography in Cipher-Block Chaining (CBC) mode
• Hash-based Message Authentication Code (HMAC) function SHA512

Reference: https://gnupg.org/documentation/manuals/gcrypt/

Note that you probably already have the run-time libgcrypt shared object library installed. However, to compile the source programs, you will also need the libgcrypt development package (libgcrypt20-dev in the Ubuntu 17.10).

This is NOT commercial software; instead, usage is covered by the GNU General Public License version 3 (2007). In a nutshell, please feel free to use the project and share it as you will but please don't sell it. Thanks!

See the LICENSE file for the GNU licensing information.

Subfolders:

• src - C-language source code and a Makefile
• bin - Upon completion of the make utility, this folder holds the cloak and uncloak executables.
• docs - project documentation (admittedly, skimpy)
• data - project example data files

The starting point with this project is in the docs/operations.txt file. Also, this note contains for cloaking the sample cleartext data and uncloaking the ciphertext.

Feel free to contact [email protected] for inquiries and issues, especially if you find any bugs. I'll respond as soon as I can.

Richard Elkins

Dallas, Texas, USA, 3rd Rock, Sol, ...