encrypted media files

[Lucas Junqueira <lu...@yahoo.com>]

Hi, is there a way to encrypt media files like videos, audios and pictures, and decrypt them while playing using the standard media-playing classes like video (netstream), sound and loader?

I'm willing to distributed some media files with an AIR application that I want to be played only on my app, and considering that people may gain access to them, I want to find some way to protect them. Is this possible?

Thank you!

Re: encrypted media files

[Tom Chiverton <tc...@extravision.com>]

On 05/05/2013 03:39, Lucas Junqueira wrote:
> Is this possible?
Medium :-)

What are you going to spend ?
Are you prepared to encrypt your output .swf, for instance, so the 
decrypt keys aren't visible ?
Can you afford to store the encrypted files and/or keys online and 
retrieve as needed ?

How much money/time has the attacker got ?

Given totally effective DRM against a motivated attacker on a computer 
under their control is impossible, you need to consider the trade offs.

Tom

Re: encrypted media files

[Scott Matheson <sm...@intralinks.com>]

You could consider holding them as binary objects, not mp3, that way they will, not know what to do with these files


Sent from my iPad

On 5 May 2013, at 03:40, "Lucas Junqueira" <lu...@yahoo.com> wrote:

> Hi, is there a way to encrypt media files like videos, audios and pictures, and decrypt them while playing using the standard media-playing classes like video (netstream), sound and loader?
>
> I'm willing to distributed some media files with an AIR application that I want to be played only on my app, and considering that people may gain access to them, I want to find some way to protect them. Is this possible?
>
> Thank you!

________________________________

Disclaimer: This electronic mail and any attachments are confidential and may be privileged. If you are not the intended recipient, please notify the sender immediately by replying to this email, and destroy all copies of this email and any attachments. Thank you.

Re: encrypted media files

[ya...@szfore.com]

i encrypted my file with xor。first，create hash value of password，second，loop and xor the password and bytearray of file。

发自我的 iPad

在 2013-5-6，21:29，Fréderic Cox <co...@gmail.com> 写道：

> What I did for this was changing the bytes in the file when not used in my
> application. When about to play in my application I would change the bytes
> again so that it only works in my application. Switch the first x bytes or
> something similar ..
> 
> Fréderic Cox
> 
> 
> 
> 
> On 05/05/13 04:39, "Lucas Junqueira" <lu...@yahoo.com> wrote:
> 
>> Hi, is there a way to encrypt media files like videos, audios and
>> pictures, and decrypt them while playing using the standard media-playing
>> classes like video (netstream), sound and loader?
>> 
>> I'm willing to distributed some media files with an AIR application that
>> I want to be played only on my app, and considering that people may gain
>> access to them, I want to find some way to protect them. Is this possible?
>> 
>> Thank you!
> 
> 

Re: encrypted media files

[Fréderic Cox <co...@gmail.com>]

What I did for this was changing the bytes in the file when not used in my
application. When about to play in my application I would change the bytes
again so that it only works in my application. Switch the first x bytes or
something similar ..

Fréderic Cox




On 05/05/13 04:39, "Lucas Junqueira" <lu...@yahoo.com> wrote:

>Hi, is there a way to encrypt media files like videos, audios and
>pictures, and decrypt them while playing using the standard media-playing
>classes like video (netstream), sound and loader?
>
>I'm willing to distributed some media files with an AIR application that
>I want to be played only on my app, and considering that people may gain
>access to them, I want to find some way to protect them. Is this possible?
>
>Thank you!