简体中文
EnglishWhat Is OpenStego?
Updated
OpenStego is a free steganography tool whose homepage describes two main functions: data hiding — hiding any data inside a cover file such as an image — and watermarking (beta), which embeds an invisible signature into files like images so unauthorized copying can later be detected. It is the right starting point if you want a straightforward, no-cost way to conceal a file inside an image or to mark images with a verifiable signature; it is not a general-purpose encryption suite or a substitute for secure file transfer.
The two modes of operation
The site presents OpenStego as having two modes, and the workflow differs for each.
Data hiding
In this mode you either hide a data file inside an image or extract data from an image. The site documents both directions with screenshots:
- Hide data — embed the file you want to conceal into a cover image.
- Extract data — recover the hidden file from the resulting image.
Watermarking (beta)
This mode lets you watermark or verify images with your signature. The documented sequence has three steps:
- Generate signature — create the signature file first.
- Embed watermark — apply that signature to an image.
- Verify watermark — check an image later against the signature.
Because the site labels watermarking as beta, treat it as the less settled of the two features and verify results on your own files before relying on it.
What it is used for
| Function | What it does | Typical use |
|---|---|---|
| Data hiding | Hides any data within a cover file (e.g. images) | Concealing a file inside an image, then extracting it |
| Watermarking (beta) | Marks files (e.g. images) with an invisible signature | Detecting unauthorized file copying |
The watermarking use case is the one the site calls out explicitly: an invisible signature can be used to detect unauthorized file copying.
Where to go next
The site's navigation lists Home, Concepts, Features, Download, and About, and it is available in English and Español. If you want to understand the underlying ideas before using the tool, the Concepts page is the site's own pointer for learning more; if you are ready to try it, the Download page is the entry point.