JSteg
From Just Solve the File Format Problem
JSteg by Derek Upham is perhaps the first true steganography program for JPG.
Preston Wilson and Randall Williams ported it to DOS
JSteg Shell by korejwa is a port to Win9x and includes certain tweaks like (optionally) including the filename and optional encryption (RC4-40). It also includes a built-in dictionary attack tool.
Links
- Analysis of format and JSteg_Data_Extractor
- JSteg Shell 2.0 homepage (archived)
- JSteg Shell 1.0A (VB4 runtimes)
- JSteg DOS version
- JSteg DOS readme
- Context diffs to convert a standard v4 JPEG source tree into a JSteg source tree (v4 JPEG source) (mirror)
- JSteg Announcement
- Detected by Stegdetect and attacked by Stegbreak
- Detecting Steganographic Messages in Digital Images (Matlab source)
- Detecting Hidden Messages Using Higher-Order Statistical Models
- A fast and effective steganalytic technique against JSteg-like algorithms
- JSteg: Steganography and Steganalysis
- SSAK - GUI front end for file identification, data carving, hexdump and steganography programs that includes JSteg
