This is the Linux app named Thumbnail Steganography whose latest release can be downloaded as ThumbStego-0.2.0.zip. It can be run online in the free hosting provider OnWorks for workstations.
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Thumbnail Steganography
DESCRIPTION:
Thumbnail steganography creates a thumbnail from a source image and stores data in it by altering it's color channels. To decipher the data, a new thumbnail is made from the original image and the differences between the pixels are calculated.Audience
Education
User interface
Java Swing, Command-line
Programming Language
Java
This is an application that can also be fetched from https://sourceforge.net/projects/thumbstego/. It has been hosted in OnWorks in order to be run online in an easiest way from one of our free Operative Systems.