[mysteria]

Sectional watermarking is always going to have a higher risk of detection using multiple rips but that's the tradeoff you get with computational power. As you said the best option is to watermark the whole thing but that's expensive.

Cinavia looks interesting as it's done on the client side, like how programs like Photoshop detect the watermarks in banknotes to prevent people from using it to create forgeries. If they managed to get it into the firmware of every television, AVR, etc. then it would be much more effective than just having it on Blu Ray players.