Preventing screen capturing in Xenocara?

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Preventing screen capturing in Xenocara?

Jyri Hovila [iki]
Dear everyone,

the possibility to grab the contents of the screen is one of the many design level security / privacy issues all major operating systems suffer from. The APIs of Windows, Android, iOS etc. allow capturing the screen without informing the user about it in any way.

It seems (quite obvious) to me that OpenBSD / Xenocara do not currently have mechanisms to limit which processes / applications can access the contents of the screen. I can already feel the storm brewing but I must ask: have there been any plans regarding such a feature?

Yours,

Jyri
--
[hidden email]
+358-404-177133 (24/7)

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Re: Preventing screen capturing in Xenocara?

Theodoros-2
Is there any point on doing so, when most environments are hoarded by mobile phones?

Nice to have, but too little of an "audience" imho.


​​

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On March 7, 2018 5:34 AM, Jyri Hovila \[iki\] <[hidden email]> wrote:

> ​​
>
> Dear everyone,
>
> the possibility to grab the contents of the screen is one of the many design level security / privacy issues all major operating systems suffer from. The APIs of Windows, Android, iOS etc. allow capturing the screen without informing the user about it in any way.
>
> It seems (quite obvious) to me that OpenBSD / Xenocara do not currently have mechanisms to limit which processes / applications can access the contents of the screen. I can already feel the storm brewing but I must ask: have there been any plans regarding such a feature?
>
> Yours,
>
> Jyri
>
>
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> [hidden email]
>
> +358-404-177133 (24/7)


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Re: Preventing screen capturing in Xenocara?

Theodoros-2
In reply to this post by Jyri Hovila [iki]
Excuse me; quick read bites back. My mind went directly to the human factor.

That process limitation would be nice to have +1

​​

‐‐‐‐‐‐‐ Original Message ‐‐‐‐‐‐‐

On March 7, 2018 5:34 AM, Jyri Hovila \[iki\] <[hidden email]> wrote:

> ​​
>
> Dear everyone,
>
> the possibility to grab the contents of the screen is one of the many design level security / privacy issues all major operating systems suffer from. The APIs of Windows, Android, iOS etc. allow capturing the screen without informing the user about it in any way.
>
> It seems (quite obvious) to me that OpenBSD / Xenocara do not currently have mechanisms to limit which processes / applications can access the contents of the screen. I can already feel the storm brewing but I must ask: have there been any plans regarding such a feature?
>
> Yours,
>
> Jyri
>
>
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> [hidden email]
>
> +358-404-177133 (24/7)


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Re: Preventing screen capturing in Xenocara?

Kevin Chadwick-4
In reply to this post by Jyri Hovila [iki]
On Wed, 7 Mar 2018 05:34:00 +0200


> The APIs of Windows, Android, iOS etc. allow capturing the screen
> without informing the user about it in any way.

The signal app on android asks/prevents screen captures. The lock
screen of the OS can hide details too.

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Re: Preventing screen capturing in Xenocara?

Kevin Chadwick-4
In reply to this post by Jyri Hovila [iki]
On Wed, 7 Mar 2018 05:34:00 +0200


> It seems (quite obvious) to me that OpenBSD / Xenocara do not
> currently have mechanisms to limit which processes / applications can
> access the contents of the screen.

Of course you do need access to initiate a screenshot command and CAN
limit what is put on the screen in the first place and what inputs are
accepted by the window manager(disregarding hacks) or web server.
Generally it is not a privacy or security issue at all especially when
we allow so much javascript etc.?