WAP Multimedia Message and DRM

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Paul Wootton
New member
Username: Devwooty

Post Number: 1
Registered: 08-2007
Posted on Tuesday, August 21, 2007 - 02:47 pm:   


I am hoping someone can enlighten me regarding the DRM and WAP MMS.

We have a service which uses HTTP POST to submit a message and attached jpeg image to NowSMS.

Without DRM, everything seems to work OK. The mobile phone gets a link to download the image and it can then be used on the phone as wallpaper etc.

We want to stop the recipient from forwarding the image and also to stop them from printing, but allow all other use of the image.

We post the following:

MMSForwardLock Yes
DRMRestrict Yes
DRMRestrictTextXML Yes (TextXML)
DRMPermissionDisplay Yes
DRMPermissionPrint Yes
DRMConstraintCount 3

When the message lands on the phone, we get a message that says something like "Key file does not allow action" (can't remember the exact message :-( ) and won't allow the user to save the image locally.

Can anyone help?

Thanks in advance.

Bryce Norwood - NowSMS Support
Board Administrator
Username: Bryce

Post Number: 7456
Registered: 10-2002
Posted on Tuesday, September 11, 2007 - 05:29 pm:   

Hi Paw,

A few things come to mind ...

First, what is the phone model? A lot of devices seem to have strange issues with any DRM beyond forward lock. (Nokia Series 60 phones, in particular, don't like DRM constraints that specify a date range, or limited number of days.)

The next thing that comes to mind ... if you want to allow the user to use the image as a wallpaper, why are you limiting it so that the image can only be displayed 3 times? I would think that setting would make the image impractical to use as a wallpaper (indeed, I tried sending a message with these attributes to an N95, and it allowed the image to be saved, but would not allow it to be used as a wallpaper).


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