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I built this Steganography tool as a research project within Oxford University. The goal was for users to be able to communicate via Facebook without anybody be
by owencm 14y ago
I built this Steganography tool as a research project within Oxford University. The goal was for users to be able to communicate via Facebook without anybody being able to even detect the presence of a message, let alone the content.
This is a dramatic improvement over the 'dead-dropping' technique of communicating secretly by leaving emails in the draft box for others to receive without actually sending them.
The really notable thing about this extension is that the JPEGs it produces can handle recompression without the contained message being damaged. Simply strapping error correction onto Steganography doesn't work and this extension is based on a new algorithm for JPEG steganography which I explain in the paper linked from the article.
I'd love to get your feedback on the extension, let me know how you found it to use and let me know if there's anything I can do to make the experience easier!
- 97-109-107 14y agoI'm the author of umshade (http://umshade.it http://umshade.it), which aims to bring a chrome extension that provides proof-of-concept grade text-encryption to any website. Obviously I like what you did a lot. How much further are you taking it? What other approaches to UI/flows did you consider?
- owencm 14y agoHow far I take it depends largely on feedback I receive. I have now completed this research project so in that capacity it is complete. I considered a number of flows but eventually decided this was most discrete. Check out the paper I link to at the bottom of my post to read all about the options I considered and why I selected this one.
- ksolanki 14y agoGreat work! Which JPEG stego algorithm do you use (if you don't mind sharing)? Edit: Found the linked paper. Thanks!
- lelandbatey 14y agoJust wanted to toss this out there: I noticed that your host for the PDF was dropbox, which often turns off access if a document gets a lot of traffic. Because of that, I mirrored the pdf here: http://lelandbatey.com/secretbook-draft-1.pdf http://lelandbatey.com/secretbook-draft-1.pdf I hope that's alright with you. If not, I'll happily take it down.
- ChuckMcM 14y agoExcept for the fact that you can detect that there is steganographic content it is aweseome :-) UMich's CITI group put together a tool to find stegonagraphic images and tested it on ebay. Now I don't have a Sun system to run their tool (if I could even load it off of QIC tape!) but the basic idea was that steganographic encoding techniques interfered with the natural noise of the image. As I recall they used techniques similar to what the SETI@Home guys were using to detect the presence of signal in noise. Dr. Peter Honeyman could tell you more and probably point you at the sources. If would be a great followup to that work to see how well it detects your images.