Display or save CSS key (VLC plays fine)

[blulc]

Hi,

The VLC Client plays a DVD ISO image well, but with other clients I can see that this file is scrambled by CSS.

What is VLC doing to decss without the DVD in drive?

Is the css key cached somewhere ? Where ?

If not, can I display the key VLC is using ?

Thanks for any help, I couldn't find any info on google, wiki, this forum search. Maybe wrong keywords or too many false positives.