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How much EXIF information is tracked by photo sharing sites?



 
 
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  #11  
Old October 28th 14, 07:19 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
A. Beck.
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Posts: 20
Default How much EXIF information is tracked by photo sharing sites?

On Tue, 28 Oct 2014 18:03:10 +0000, Sandman wrote:

how is this "intensly personal information"?


If I snap a picture of a pink flower in the open-air foyer
at the AIDS clinic while I'm supposed to be at work, and the
EXIF information shows almost exactly when & where I was, that's
(by it's very revealing nature) certainly intensely
personal information (it's meta-information but intensely
revealing nonetheless).

  #12  
Old October 28th 14, 07:59 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
Joe Makowiec
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Posts: 175
Default How much EXIF information is tracked by photo sharing sites?

On 28 Oct 2014 in rec.photo.digital, A. Beck. wrote:

How much EXIF information is tracked by photo sharing sites?
http://regex.info/exif.cgi


If you want to alter or get rid of EXIF data, you can use exiftool:

http://www.sno.phy.queensu.ca/~phil/exiftool/

Free; binaries available for Windows and Mac, (Perl) source for
everything else. It's a command line tool, although I think that there
are GUI front ends available.

--
Joe Makowiec
http://makowiec.org/
Email: http://makowiec.org/contact/?Joe
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  #13  
Old October 28th 14, 08:12 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
Sandman
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Posts: 5,467
Default How much EXIF information is tracked by photo sharing sites?

In article , A. Beck. wrote:

Sandman:
Flickr, obviously, keeps the EXIF data.


Yikes!


I had downloaded images and *never* saw EXIF data in those
downloaded images.


Are you sure about this?


Seriously? I mean, you snipped away parts of my message where I said they
show it on the photo page:

https://www.flickr.com/photos/jonaseklundh/15351219105/

Click "Show Exif".

Also, if you download the original, all the Exif is there.


--
Sandman[.net]
  #14  
Old October 28th 14, 08:17 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
Sandman
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Posts: 5,467
Default How much EXIF information is tracked by photo sharing sites?

In article , A. Beck. wrote:

Sandman:
how is this "intensly personal information"?


If I snap a picture of a pink flower in the open-air foyer at the
AIDS clinic while I'm supposed to be at work, and the EXIF
information shows almost exactly when & where I was, that's (by it's
very revealing nature) certainly intensely personal information
(it's meta-information but intensely revealing nonetheless).


And in this supposed "intensly personal information", where can I read:

1. It was taken by you
2. You are a patient of said clinic

For the all the supposed EXIF-reader knows, it was taken by someone
visiting the clinic because they've sponsored it with money, or they're a
gardener that works in many garens in that area.

Again, this isn't "intensly personal information" if it requires tons of
assumptions.


--
Sandman[.net]
  #15  
Old October 28th 14, 08:17 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
nospam
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Posts: 24,165
Default How much EXIF information is tracked by photo sharing sites?

In article , A. Beck.
wrote:

postal service retain every sender/recipient address


I didn't know that the (snail mail) post office retains
all from/to information.

Is that really true and verified?
(or just conjecture?)


it's true.

they photograph every item mailed.
  #16  
Old October 28th 14, 08:22 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
A. Beck.
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Posts: 20
Default How much EXIF information is tracked by photo sharing sites?

On Tue, 28 Oct 2014 18:59:05 +0000, Joe Makowiec wrote:

If you want to alter or get rid of EXIF data, you can use exiftool:
http://www.sno.phy.queensu.ca/~phil/exiftool/



Exiftool works nicely.
Here are some other ways to remove the EXIF data.


$ sudo apt-get install imagemagick
$ convert -strip pic.jpg pic_sansexif.jpg
$ for i in *.{jpg,JPG}; do echo "Cleaning $i EXIF"; convert -strop $i $i;
done

$ sudo apt-get install exiftool libimage-exiftool-perl
$ exiftool -all= foo.jpg
$ for i in *.{jpg,JPG}; do echo "Cleaning $i EXIF"; exiftool -all= "$i";
done

$ sudo apt-get install jhead
$ jhead -purejpg *.jpg
$ for i in *.{jpg,JPG}; do echo "Cleaning $i EXIF"; jhead -purejpg $i;
done

I don't know how to remove EXIF with exiftran (do you?).
$ sudo apt-get install exiftran

$ sudo apt-get install exiv2
$ exiv2 -rm pic.jpg pic.jpg ???
(I'm not sure the sytax to use the "rm" option to remove EXIF data)

  #17  
Old October 28th 14, 08:32 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
Jolly Roger[_2_]
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Posts: 176
Default How much EXIF information is tracked by photo sharing sites?

On 2014-10-28, A. Beck. wrote:
On Tue, 28 Oct 2014 18:03:10 +0000, Sandman wrote:

how is this "intensly personal information"?


If I snap a picture of a pink flower in the open-air foyer
at the AIDS clinic while I'm supposed to be at work, and the
EXIF information shows almost exactly when & where I was, that's
(by it's very revealing nature) certainly intensely
personal information (it's meta-information but intensely
revealing nonetheless).


Remove the EXIF metadata before posting pictures. Problem solved.

--
E-mail sent to this address may be devoured by my ravenous SPAM filter.
I often ignore posts from Google. Use a real news client instead.

JR
  #18  
Old October 28th 14, 09:05 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
Davoud
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Posts: 639
Default How much EXIF information is tracked by photo sharing sites?

A. Beck:
How much EXIF information is tracked by photo sharing sites?
http://regex.info/exif.cgi

I often post photos to photo-sharing sites, whether for the
purpose of social networking (pinterest, facebook, etc)
or for Usenet posts (tinypic, flickr, etc) or for personal
sharing (iCloud, dropbox, google drive, etc).

The EXIF, as you know, can reveal exactly where and when
the photo was taken, and even what camera was used, and, of
course, the time and date, etc, the combination of which could
easily reveal intensely personal information.

When I DOWNLOAD those pictures, generally (always?) the
EXIF information seems to be stripped out.

But ... how much of that personal EXIF information is retained by
the web site (and used for their possibly nefarious purposes)?


I downloaded this photo of mine
https://www.flickr.com/photos/primeval/15490456502/in/photostream
from my Flickr stream. The EXIF is intact.

That's the way I want it. I make and post many photos of small
arthropods for my "clients," who include the Encyclopedia of Life, the
Maryland Biodiversity Project, and anyone in the world with an Internet
connection who would like to view or download my photos and use them
for their own non-commercial purposes under the Creative Commons
license. Once in a while a commercial customer licenses one of my
photos for publication. My income from this is utterly insignificant.

My scientific photos would be useless without accurate date/time and
location information in the EXIF. I have Photoshop set to preserve this
data when I export to JPEG for the Web.

It is possible to set Photoshop to not include EXIF when exporting.
That would be your best bet if you want a certain measure of anonymity.

My first recommendation for those who seek anonymity is that they get
off the Internet. One can't have it both ways; every time one uses the
Internet one sends personal information to a remote server. It is
impossible to be anonymous on the Internet. A person who wishes to hide
should give up their drivers license, their automobile(s), their real
estate, utilities, checking account, job, retirement annuity, and such
like, and consider leaving their home in the developed world for a much
less developed country. Of course, one needs a passport to do that, and
one must supply a considerable amount of personal information to get a
passport. Chances are some of that information passes through Justice
Department computers and is automatically scanned for red flags. It is
extremely difficult and risky to attempt to counterfeit a U.S.
passport.

For what "nefarious purposes" do you think people might use your EXIF?
Might someone learn when you visited the Grand Canyon or the Eiffel
Tower? (Nefarious people already know where these places are.) Got more
than one wife/family? Then you'll definitely want to unplug.

--
I agree with almost everything that you have said and almost everything that
you will say in your entire life.

usenet *at* davidillig dawt cawm
  #19  
Old October 28th 14, 09:16 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
Davoud
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Posts: 639
Default How much EXIF information is tracked by photo sharing sites?

A. Beck:
I didn't know that the (snail mail) post office retains
all from/to information.


Is that really true and verified?
(or just conjecture?)


It is verified that the USPS records and reports to security
authorities a relatively small amount of sender and receiver data.
WaPo, 27 October "In a rare public accounting of its mass surveillance
program, the United States Postal Service reported that it approved
nearly 50,000 requests last year from law enforcement agencies and its
own internal inspection unit to secretly monitor the mail of Americans
for use in criminal and national security investigations."

50,000 out of approximately 212 billion pieces of mail. That's about
2.358x10e-5%.

It is also not true that the NSA has the capability of reading every
e-mail sent in the world or listen to every phone call. SIGINT is labor
intensive; most of the people at NSA are so busy that they don't have
time to read their own e-mails.

--
I agree with almost everything that you have said and almost everything that
you will say in your entire life.

usenet *at* davidillig dawt cawm
  #20  
Old October 28th 14, 09:29 PM posted to rec.photo.digital,alt.os.linux,comp.sys.mac.system
nospam
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Posts: 24,165
Default How much EXIF information is tracked by photo sharing sites?

In article , Davoud
wrote:

I didn't know that the (snail mail) post office retains
all from/to information.


Is that really true and verified?
(or just conjecture?)


It is verified that the USPS records and reports to security
authorities a relatively small amount of sender and receiver data.
WaPo, 27 October "In a rare public accounting of its mass surveillance
program, the United States Postal Service reported that it approved
nearly 50,000 requests last year from law enforcement agencies and its
own internal inspection unit to secretly monitor the mail of Americans
for use in criminal and national security investigations."

50,000 out of approximately 212 billion pieces of mail. That's about
2.358x10e-5%.


that's for requests.

the usps photographs *every* piece of mail. every single one. this
began after 9/11.

It is also not true that the NSA has the capability of reading every
e-mail sent in the world or listen to every phone call. SIGINT is labor
intensive; most of the people at NSA are so busy that they don't have
time to read their own e-mails.


yes they do. they may not read them now, but they are stored 'just in
case'.
 




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