A Firefox add-on that lets you hide files inside images.
The FireSteg addon is cross-platform and it works on Mac OS X, Windows and Linux.
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What's New in This Release:
- The biggest new feature is one requested by several users: password-based encryption for all files and filenames stored in images. SHA1+3DES are used in order to accomplish this; more details can be found by inspecting the source code.
- Revamped the user interface and added localization support for SEVEN new languages: German, Spanish, French, Japanese, Polish, Brazilian Portuguese, and Turkish.
- Numerous bug fixes were integrated, including (most glaringly) a bug that prevented users from extracting files from multiple images under certain non-trivial circumstances.