1 Reply Latest reply: May 24, 2012 5:47 AM by Apurva Udaykumar RSS

    how to know if PHDS is actually DRM'd and aes-128 encrypted, and what does it mean?

    Syberkitten Community Member
    Syberkitten May 24, 2012 2:42 AM

      hi

      trying to figure out pRTMP which resulted in un-encrypted streams, an issue which has not been resolved yet:

      http://forums.adobe.com/message/4412068

       

      we have tried using the PHDS protocol for serving VOD (video on demand) content to a flash player

      using OSMF on a Flash 11 player like suggested.

       

      everything seems to be ok, the stream is being published, and the .f4m meta file

      seems to contain the DRM data.

       

      What i do not understand is the lack of any

      flash client interaction with this stream.

       

      you simply need an OSMF player running on flash player 11 and you can play

      the PHDS Stream, so where does the DRM come in?

       

      • is it only for protecting the stream from being listened to by a "man in the middle"?
      • or is it for protecting the stream from being served too many times?
      • is it to disable the ability to simply save the stream to a file?

       

      • is PHDS simply a one push button solution to create DRM'd streams
        which don't require any special interaction with the app running on the flash player?
        such as required when using the Flash Access server (which is a stand alone DRM server)

       

      • and last, the PHDS documentation describes a packager for video files,
        but it is unclear when this tool has to be used to package streams, because it seems
        that streams that have not been subjected to this tool still report valid DRM data inside
        the f4m manifest, so when to use it, and can we trust the DRM metadata saying
        that DRM is enabled and encrypted? (we have the same issue with the pRTMP which said stream is protected
        but it was actually not so)

       

      an f4m generated example:

      <manifest xmlns="http://ns.adobe.com/f4m/1.0">

       

      <id>973266-40.mp4</id>

      <streamType>recorded</streamType>

      <duration>107.8</duration>

      bootstrapInfo profile="named" id="bootstrap5925">

      AABBAAAB0aFic3fAAAAAAAAAFgAAAAPoAAAAAAABpPAAAAAAAAAAAAAAAAA

      </bootstrapInfo>

       

      <drmAdditionalHeader drmContentId="973266-40.mp4" id="drmMetadata8114">

      AgARfASDFGAEFkZGSDFGHHl0aAW9u345YWxIZWFkZXIDAApFbmNyeXB0aW9uAwAHVmVyc2lvbgB

      </drmAdditionalHeader>

       

       

      <media streamId="973266-40.mp4" url="973266-40.mp4" bootstrapInfoId="bootstrap5925" drmAdditionalHeaderId="drmMetadata8114">

       

      <metadata>

      AggAbgAKb23345NZXRhRGF0YQgAAAAAAAhkdXJhdGEasfvhflvbgBAWvMzMzMzMwAFd2lkdG

      </metadata>

      </media>

       

      </manifest>