The programmable security technology used by Fox and more recently Paramount to protect theatrically released films on Blu-ray discs represents an important step forward over previous security technologies, such as the quickly broken CSS for DVDs and AACS encryption key management used on the now dead HD-DVD and on Blu-ray. Although no security technology is perfect, BD+ is an important advance because the programming can be modified in response to successfull cracks.
There has always been a cat and mouse game between security technologies of all kinds and those who seek to break them. Each side learns from the others successes and failures and improves their defense and offense accordingly. Postings on Slashdot and the Slysoft website report that there are now at least 19 Blu-ray releases that have not yet been broken.
It appears that the least powerful forms of BD+ were used first in order to determine how crackers / hackers would attack the security system. Having been through several iterations, it seems that the level of security has been upgraded on the newer offerings.
