[Bug 294580] New: Unclear status of jpg-pics: how to check for hidden or even malicious data in jpg?

[Axel Krebs]

https://bugs.kde.org/show_bug.cgi?id=294580

           Summary: Unclear status of jpg-pics: how to check for hidden or
                    even malicious data in jpg?
           Product: digikam
           Version: 2.1.1
          Platform: Ubuntu Packages
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: major
          Priority: NOR
         Component: Image Editor
        AssignedTo: [hidden email]
        ReportedBy: [hidden email]


Version:           2.1.1 (using KDE 4.7.4)
OS:                Linux

Dear all:

I have some hundres of jpg-pics woith pairwise diffeent length.
I can open most of these pics without aqppearing problems.

When thinking about these different lengths, I come across different metadata.
Other data could be included in hidden.

I there a way to "normalize" jpg´s to take away all not visual data contained?

Please let me know

Thank you,


Axel

Reproducible: Always

Steps to Reproduce:
Just having a look at pairs of pics.

Actual Results:  
Just having a look at pairs of pics.

Expected Results:  
I´d like to understand, and, if neede to "normalize" all jpg pics.

OS: Linux (x86_64) release 3.0.0-16-generic
Compiler: gcc

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[Gilles Caulier-4]

https://bugs.kde.org/show_bug.cgi?id=294580


Gilles Caulier <[hidden email]> changed:

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--- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2012-02-21 21:10:26 ---
Axel,

I don't understand th problem exactly ?

Gilles Caulier

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[Axel Krebs]

https://bugs.kde.org/show_bug.cgi?id=294580





--- Comment #2 from Axel Krebs <axel krebs t-online de>  2012-02-22 00:35:59 ---
I ask myself, if there is a way to check the questioned pics for
integrity and/or the existance/absence of non-visual ("hidden") information.

Onw way to achieve this could be, to erase those secondary data to get a
standardized pic _without_ this information.


Am 21.02.2012 22:10, schrieb Gilles Caulier:

> https://bugs.kde.org/show_bug.cgi?id=294580
>
>
> Gilles Caulier <[hidden email]> changed:
>
>            What    |Removed                     |Added
> ----------------------------------------------------------------------------
>                  CC|                            |[hidden email]
>
>
>
>
> --- Comment #1 from Gilles Caulier <caulier gilles gmail com>  2012-02-21 21:10:26 ---
> Axel,
>
> I don't understand th problem exactly ?
>
> Gilles Caulier
>

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[Gilles Caulier-4]

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--- Comment #3 from Gilles Caulier <caulier gilles gmail com>  2012-02-22 06:12:26 ---
What do you mean by hidden information ?

Gilles Caulier

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[Christoph Feck]

https://bugs.kde.org/show_bug.cgi?id=294580


Christoph Feck <[hidden email]> changed:

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--- Comment #4 from Christoph Feck <christoph maxiom de>  2012-02-22 11:15:29 ---
Axel wants to remove comments and any other metadata, which is not needed to
reproduce the image data.

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[Christoph Feck]

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Christoph Feck <[hidden email]> changed:

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           Severity|major                       |wishlist




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--- Comment #5 from Gilles Caulier <caulier gilles gmail com>  2012-02-22 11:20:36 ---
All digiKam metadata are visible through Captions & Tags from right sidebar.

If he want to remove these info, for example to export images, Batch Queue
Manager has a tool to remove metadata.

Gilles Caulier

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[Axel Krebs]

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--- Comment #6 from Axel Krebs <axel krebs t-online de>  2012-02-22 19:04:13 ---
Am 22.02.2012 12:20, schrieb Gilles Caulier:

> https://bugs.kde.org/show_bug.cgi?id=294580
>
>
>
>
>
> --- Comment #5 from Gilles Caulier <caulier gilles gmail com>  2012-02-22 11:20:36 ---
> All digiKam metadata are visible through Captions & Tags from right sidebar.
>
> If he want to remove these info, for example to export images, Batch Queue
> Manager has a tool to remove metadata.
>
> Gilles Caulier
>

Dear all:

Excuse me for late answering.

I have numbers of pairwise different pics. As much as I can see, most of
these pics open ok.

All have the _same_ original file, still they have _different_ sizes.
For this reason, I assumed the size differences must be related to
different metadata.

Here, I assumed additionally, that different metadata produce different
sizes.

For this reason, I´d like to create a "minimum standard" file without
(or with controlled) metadata content.

Batch maybe a good solution, if metadata removing works reliable.

Thank you for your consideration-


Axel

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[Gilles Caulier-4]

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Gilles Caulier <[hidden email]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
          Component|Image Editor                |Batch Queue Manager
   Version Fixed In|                            |4.0.0
         Resolution|---                         |FIXED

--- Comment #7 from Gilles Caulier <[hidden email]> ---
A tool in BQM exist to remove all metadata at export time...

Gilles Caulier

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