Re: Hacking Pictures?

[Sven Aluoor <aluoor () gmail com>]

On Fri, Jan 21, 2011 at 5:42 PM, Steven Bonici <sbonici () ilaonline org> wrote:
> I was speaking to someone from DHS (not a tech) and he was telling me
> that there are applications that can "look" at a picture taken from a
> cell phone and can get the location of where the picture was taken.  Is
> this true?  If so, can someone provide more information?  If this can be
> done, people posting pictures from their cell phones to social sites
> should be aware of this...

Hi Steven

Quote from https://secure.wikimedia.org/wikipedia/en/wiki/Exchangeable_image_file_format

The Exif format has standard tags for location information. Currently,
a few cameras and some higher-end mobile phones have a built-in GPS
receiver and store the location information in the Exif header when
the picture is taken. Some other cameras have a separate GPS receiver
that fits into the flash connector or hot shoe. Recorded GPS data can
also be added to any digital photograph on a computer, either by
correlating the time stamps of the photographs with a GPS record from
a hand-held GPS receiver or manually using a map or mapping software.
The process of adding geographic information to a photograph is known
as geocoding. Photo sharing communities like Panoramio, locr or Flickr
equally allow their users to upload geocoded pictures or to add
geolocation information online.

With the command line tool "exiftool" you can view those information.
http://www.sno.phy.queensu.ca/~phil/exiftool/

cheers Sven

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