Read this: Has Blu-rays encryption been cracked again? |Technology |The Guardian

Summary: A few eager hackers on the Doom9 forum have, over the past couple of months, developed their own Blu-ray software player, by analysing in minute detail the workings of real Blu-ray players. Ideally, the Blu-ray disc BD shouldn't realise it's playing somewhere it shouldn't. Of course, not everyone wants to pay 79 64 for a closed-source Windows program. - guardian.co.uk