It seems that movie studios ha

The BD+, Blu-ray's Digital Right Protection (DRM) technology, is a content code that interacts with the Virtual Machine found on Blu-Ray players and decides whether the player is hacked. To successfully attack the BD+ system, pirates would have to overcome the AV content security system (e.g. extract AACS keys) and also overcome title-specific security code (e.g. reverse engineer security code). This title-specific security code (BD+ content code) is included by Studios on a title-by-title basis.

Slysoft, an Antigua-based software company, had found a way to crack BD+ last year, with the first release of its AnyDVD HD software. It allowed someone to create a working backup of a BD+ Blu-ray movie. But the BD+ was designed to allow for periodic updates that could resecure protected content in the event of a breach. This seems to be the situation here, since Slysoft has released a list of movies at its forums that the AnyDVD HD product can't yet handle. According to the company, these new movies include a new version of the BD+ released in November. The list appeared online in the 30th of October and it is still growing.

Slysoft still anticipates that it will be able to break the updated scheme, but it'll take about three months, versus the seven-day window we saw in the previous released of AnyDVD HD, when it had to deal with the earlier versions of BD+.

"In early November 2008 multiple versions of BD+ security code were released which, according to Slysoft, may take a few months to circumvent", reads Slysoft's announcement.

Members of the Doom9 forum have also reverse engineered the virtual machine specification, trying to develop a Linux-based, software package that can handle BD+.