S-Tools

File Format
Name	S-Tools
Ontology	Electronic File Formats Encryption Steganography S-Tools
Released	1994

S-Tools by Andy Brown is a Win32 steganography program that hides a single file in BMP, GIF, and WAV files or in the unused space of a floppy

S-Tools prepends 32 bits of random data to the front of the raw file data so that two identical hidden files that are encrypted in CBC, or PCBC mode will never encipher to the same ciphertext. Secondly, the 32 bit length of the hidden file is included.

Version 2

• Not compatible with Version 1
• BMP & GIF support added
• Much better data hiding. Bits now chosen with a strong random number generator
• DES, Triple DES, IDEA, MPJ2 and NSEA encryption

Version 3

• Adds FDD module

Version 4

• Not compatible with previous versions
• Removes FDD module
• Encryption options changed to DES, Triple DES, IDEA, and MDC

Links

• v4.0 (mirror)
• v3.0 (mirror)
• v2.0 (mirror)
• v1.0 (mirror)
• The HackLab's Steganography Thumbprinting - includes Steganography Brute v1.0 script to bruteforce S-Tools v4 and Steganos