owencm

7 ms·

31.
by owencm 14y ago
You're right, if provided a folder of 10 images, one of which contained a secret message then detecting it would be trivial. For Facebook to do the same with 300+ million photo uploads daily would be certainly a non-trivial process. And gov
32.
by owencm 14y ago
The retrospective scanning is a great point - I hadn't considered that. The detection process is certainly not going to be built into the Facebook upload process unless really serious (and seriously public) usage of these techniques takes o
33.
by owencm 14y ago
How 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
34.
by owencm 14y ago
Encryption provides the ability to communicate without any intercepter being able to read the content. In many cases this is fine, but in some cases using encryption software is enough to incriminate you (e.g. spies). Hence steganography me
35.
by owencm 14y ago
Good point. I've rephrased this sentence to be less strong. The gist is that although they could theoretically be detected it would be computationally infeasible for Facebook to do the scanning since they receive 300+ million new photos a
36.
by owencm 14y ago
As you say, it is very possible to build or use detectors for systems such as this. The advantage in this case is that 300+ million new photos are uploaded to Facebook every day so scanning them all would be highly computationally intensive
37.
by owencm 14y ago
The message is hidden secretly by making very slight changes to the image. When used on Facebook you can receive the secret messages while looking at an image by pressing ctrl+alt+a. That example is just to show approximately how the new im
38.
by owencm 14y ago
I've uploaded a new version with that image replaced just in case. Try again now.
39.
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 i
40.
Show HN: Hide Secret Messages In Facebook Photos With My Chrome Extension(owencampbellmoore.com)
153 points by owencm 14y ago|54 comments
41.
by owencm 14y ago
I've started a Slant comparison page for Google Reader replacements, hopefully we can crowd source a good, feature-by-feature comparison of the replacement apps to help decide. http://slant.co/topics/what-is-the-best-alternative-to-googl..
42.
Comparison of search options for web applications(slant.co)
3 points by owencm 14y ago|0 comments
43.
by owencm 14y ago
43 seconds in shows a Thunderbolt port (aka, Apple proprietary). Clearly a fake.
44.
by owencm 14y ago
I just added a Slant for this topic so we can collaboratively explain both sides: http://slant.co/topics/is-google-s-freeandopen-internet-camp...