Why can't ATSC 3.0 Encryption Be Handled at the DVR Level?

[pixelstuff]

I'm curious why the ATSC 3.0 DRM encryption certification or the decryption capability has to be at the tuner level instead of at the DVR or software player level. Can the tuner not see the raw bits coming across the airwaves and allow the DVR just store them on a drive without even knowing what they mean? Then playback (including live viewing) is when the DVR or client software would need to decrypt them.

[howardc1243]

I'm curious why the ATSC 3.0 DRM encryption certification or the decryption capability has to be at the tuner level instead of at the DVR or software player level. Can the tuner not see the raw bits coming across the airwaves and allow the DVR just store them on a drive without even knowing what they mean? Then playback (including live viewing) is when the DVR or client software would need to decrypt them.

as nickk has explained it many times the decryption is done at the software and firmware level the hdhomerun app passes the content to the tuner as is from the broadcaster.

[nickk]

DRM is not handled by the tuner or the DVR - it has to handled by the player.
This is because A3SA requires the encryption to be in place over the network link that connects the tuner or DVR to the player device.