Guinness steganographied

An example of steganography ( see digitalphotography.weblogsinc.com/2005/07/29/steganograph... )

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Comments

t-squared says:

So there's actually a PDF encoded in this shot? Dude.

Pretty nice tones on top of that and a handsome dog.
Posted 54 months ago. ( permalink )

Gudlyf says:

Yes, within the full-size image there's a PDF file encoded. Use the 'steghide' utility with the password 'testing123' to extract it. Pretty cool, eh?
Posted 54 months ago. ( permalink )

Cool--you very own data dog. Maybe not as smart as Ein from Cowboy Bebop, but just as cute. Enjoyed the article at digitalphotography.weblogsinc.com/entry/12340 00647052419
It was referenced on slash dog--I mean slash dot.
Posted 53 months ago. ( permalink )

arvind k says:

Before filckr gets slashdotted, I better grab the pic :)
Very interesting.
Posted 53 months ago. ( permalink )

Iain Alexander says:

Although I have a passing interest in cryptography and steganography (never had a cause to need the latter) -but I kept reading because it had a dog picture in it!

How sad am I?
(nice dog by the way)
Posted 53 months ago. ( permalink )

Jesus H. Shatner says:

Good show!

Of course, there's the question you don't address in your write-up: what's the efficiency involved in storing your files this way? How aggressively could you import data into images without compromising the photos themselves? How much extra time and computation do you add for the sake of free hidden storage of arbitrary data?

I figure you considered that, but as long as strangers are likely to get a look at this, why not geek out a little more.
Posted 53 months ago. ( permalink )

Jesus H. Shatner says:

And, yeah, darned nice shot of the dog.
Posted 53 months ago. ( permalink )

Jesús Flores says:

That's great. Very nice dog indeed!
Posted 53 months ago. ( permalink )

Gudlyf says:

I had considered how much time it takes to go through the process, and really I have to imagine it's a trivial job for a coder to make a "Flickr Uploader"-like tool that will do the whole process for you. Similar to the GMail drive. Imagine telling a program what folder to use for cover image files, then drag and drop your files into the Flickr drive. It encodes them into the images, tags them with the filename or some other informative names, and uploads them to Flickr. I think it'd be very easy.
Posted 53 months ago. ( permalink )

arnet says:

That's great !
Posted 53 months ago. ( permalink )

mariko_t says:

hmmm, I downloaded the pic and the size was:
08/22/2005 11:46 AM 1,709,600 steno_dog.jpg

which, according to your article, was the size of your original image before you inserted the pdf...
$ steghide embed -ef JobApp.pdf -cf guinness.jpg -p testing123 -sf guinness-steg.jpg
embedding “JobApp.pdf” in “guinness.jpg”... done%
writing stego file “guinness-steg.jpg”... done
$ ls -g
total 3416
-rw-r—r— 1 admin 1709600 Jul 29 13:39 guinness.jpg
-rw-r—r— 1 admin 1696487 Jul 29 14:25 guinness-steg.jpg
-rw-r—r— 1 admin 73255 Jun 30 14:09 JobApp.pdf
Posted 53 months ago. ( permalink )

Gudlyf says:

mariko_t: Are you sure you grabbed the original size photo and the one attached to THIS page, not the other image of the dog? I just tried it and I get the one with the steg info attached.
Posted 53 months ago. ( permalink )

mariko_t says:

Thanks. Yes, I must have grabbed the wrong dog before.
Posted 53 months ago. ( permalink )

fogetaboutet says:

Has flickr changed something in the past two months? Can you still extract the message?
Posted 51 months ago. ( permalink )

Gudlyf says:

I just tried it and it works fine. make sure you use it on the Original size picture, the largest one. Not the default size you see here.
Posted 51 months ago. ( permalink )

fogetaboutet says:

It worked this time. I had been using the original size this whole time, but the difference this time is that I downloaded the file to guinness-steg.jpg rather than the made-up named given by Flickr.

Does this sound right to you?

Thanks a lot for your response.
Posted 51 months ago. ( permalink )

Gudlyf says:

Yeah, if you follow the directions I gave to the letter, I guess you'd need to rename the file from what flickr uses. That shouldn't be necessary, though.
Posted 51 months ago. ( permalink )

TJDax says:

Hi. I'm doing a steganography project for my discrete wavelets course at university. May be use your article and image as an example in our presentation?
Posted 3 weeks ago. ( permalink )

Gudlyf says:

TJDax: Sure, go for it!
Posted 3 weeks ago. ( permalink )

TJDax says:

Thanks!
Posted 3 weeks ago. ( permalink )

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Guinness steganographied

Comments

t-squared says:

Gudlyf says:

Roswell62 says:

arvind k says:

Iain Alexander says:

Jesus H. Shatner says:

Jesus H. Shatner says:

Jesús Flores says:

Gudlyf says:

arnet says:

mariko_t says:

Gudlyf says:

mariko_t says:

fogetaboutet says:

Gudlyf says:

fogetaboutet says:

Gudlyf says:

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