CHDK Forum

Using CHDK => Script Writing => Topic started by: Lebeau on 24 / May / 2011, 17:35:02

Title: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: Lebeau on 24 / May / 2011, 17:35:02
Title: Re: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: reyalp on 24 / May / 2011, 18:03:59
Quote
Proofing the integrity of digital images is vital for their acceptance as evidence at court. And due to the increasing amount of Internet-based news distribution for a future information society the question whether to trust images or not will become common. To ensure the authenticity and integrity of an image it should be protected at the most early stage possible, during its creation within a digital camera. Only then one can be sure that no manipulations have taken place before adding the security information.
Can I just give them an F right now and save them the trouble ? Seriously, the problem as stated is unsolvable. Anything that can be done in CHDK could be done to an altered CHDK raw image after the fact.

Both Canon http://www.elcomsoft.com/canon.html (http://www.elcomsoft.com/canon.html) and Nikon http://www.schneier.com/blog/archives/2011/05/nikon_image_aut.html (http://www.schneier.com/blog/archives/2011/05/nikon_image_aut.html) have failed to solve it, and they control the hardware.
Title: Re: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: whim on 24 / May / 2011, 18:31:53
@reyalp

LOL Kind of like a follow-up to this post (http://chdk.setepontos.com/index.php?topic=520.msg26832#msg26832) from about 2.5 years ago.

wim
Title: Re: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: thepanoguy on 25 / May / 2011, 01:38:50
Title: Re: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: fudgey on 25 / May / 2011, 16:21:06
I find it quite endearing that they think this could/should be implemented in ubasic.  :blink:
Title: Re: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: philmoz on 25 / May / 2011, 18:37:44
You'd think the 'Center for Advanced Security Research' would actually do some security research before coming out with something this stupid :lol

Title: Re: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: Lebeau on 27 / May / 2011, 17:16:49
I am really happy from receiving these comments because that was my first impression.

How are you expecting to create encrypted signature within raw data using scripting language ?
Encrypted signature within raw data is feasible but is it usefull and, encountering first objective, secure ?

I like CHDK potentials and community but it's still oriented toward multimedia (photo, video, audio) applications.
Title: Re: In-Camera Image Integrity Protection -Master/Diploma thesis- using CHDK
Post by: reyalp on 27 / May / 2011, 17:30:42
Quote from: Lebeau on 27 / May / 2011, 17:16:49
I am really happy from receiving these comments because that was my first impression.

How are you expecting to create encrypted signature within raw data using scripting language ?
Presumably, you'd put the actual encryption stuff in the C code...
Quote
Encrypted signature within raw data is feasible but is it usefull and, encountering first objective, secure ?
It depends on the objective. It's possible that the listing you posted doesn't describe the objective accurately and they are actually trying to do something more reasonable...

If the objective is an image authentication system similar to the ones I linked in my earlier post, it appears deeply misguided to think you could do this in software on the camera.

Some related objectives (like "This image was produced by someone in possession of a particular secret") should be achievable.

One would think they must read these forums, so maybe they will enlighten us ;)