zsteg is a command-line tool that detects steganographically hidden data in PNG and BMP image files.
It specialises in identifying data concealed using least significant bit techniques and can automatically test a range of bit, colour channel and pixel-order combinations.
The software can detect zlib-compressed content and data produced using techniques associated with OpenStego, Camouflage, wbStego and the Eratosthenes set. It can also extract selected payloads for further examination.
This is free and open source software.
Key Features
- Detects least significant bit steganography in PNG and BMP files.
- Automatically tests all known extraction methods.
- Extracts selected hidden payloads from images.
- Supports configurable colour channels, bit depths and pixel iteration orders.
- Detects zlib-compressed data.
- Recognises data hidden using OpenStego, Camouflage and wbStego techniques.
- Can analyse only prime-numbered bytes or pixels.
- Supports bit shifting, inversion and pixel-aligned extraction.
- Uses the file command to identify discovered data types.
- Searches extracted data for printable ASCII strings.
Website: github.com/zed-0xff/zsteg
Support:
Developer: Andrey “Zed” Zaikin
License: MIT License
zsteg is written in Ruby. Learn Ruby with our recommended free books and free tutorials.
Related Software
| Steganography Tools | |
|---|---|
| OpenStego | Java based tool to hide secret data in image files |
| stegify | Tool written in Go for LSB steganography |
| Stegano | Supports hiding data in PNG images via LSB encoding |
| Snow | Whitespace steganography program |
| Stegosuite | Steganography tool which lets hide information in image files |
| jdvrif | Hide files within a JPG cover image |
| Wavsteg | Uses least significant bit steganography to hide a file in .wavs |
| Steghide | Uses an algorithm which is undetectable by color-frequency tests |
| Steganoroute | Send steganographed text messages to mtr with fake hops in the network |
| Stegoshare | Java based steganography tool |
| snowdrop | Text watermarking and watermark recovery |
| OutGuess | Universal steganographic tool |
| Rooks | Adaptive steganography toolkit |
| StegCracker | Steganography brute-force utility to uncover hidden data inside files |
Read our verdict in the software roundup.
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