FileStegano
From Just Solve the File Format Problem
FileStegano by Gottfried Prasetyadi is an open-source Win32 program that hides a file in another file.
It encrypts the hidden file with Rijndael-256 (AES), appends an encrypted 64-byte ID block (with hash value, type (extension) of file and filesize), and appends that all to the host file.
It only supports hiding a single file in another.
Links
- Homepage
- File Encryption and Hiding Application Based on AES and Append Insertion Steganography - contains format details
- Download (mirror)
- Review