Quote - The DVD player is interfaced to the computer by means of a flat 40 wires cable following the EIDE electrical/software specification. You can use the same player with PC 16/32/64 bits, with Windows or Linux. With Mac hardawre and OS and even with Sony Playstation.

You need the software to decode the data though.

There is no technical reason why such software could not be made for 32 bit versions of Windows or any version of Linux; only the licensing requirements that licensees of AACS are forbidden from writing a BD player or codec that works on those systems because they are deemed "insecure".

Quote - The DVD data is always the same, it's a read-only-device. Your DVD, your TV and your car are not conected to the internet, so the DVD reader's decoding scheme is hardwired, always the same and the same for any DVD. There's no way to enter a license into a DVD player, you only can select the options and scenes.

The manufacturer of the hardware has to license the copy protection platform just in order for the player to be able to read protected discs (which is nearly every disc on the market).

Quote - It doesn't matter how the DVD data is encoded in the disk, RIAA and MPAA must give the player fabricant all the information and keys needed to decode the disk data, if not their product will be useless and the keys and information are the same for all disks and don't change through time.

The fabricant has to agree to certain terms and conditions in order to receive a key; those terms including to keep the key a secret and to go to certain minimum lengths to prevent the key from ever being compromised, and to not use it to build a player that can compromise copy protection.

Under AACS, it is possible to revoke a key by removing it from the keyset from future disks.  Those discs would no longer work with that key (though there is nothing they could do about existing discs).