Only open when the broadcaster or uplinker has a problem or are testing something. Then if CWs stay the same for minutes they are then useable as Constant Control Words (CCWs, Sometimes called Fixed or Static FCWs or SCWs). But when they are changing normally (ie too frequently) then not posted or available in Softcam.
Conax CAS7 – the best CAS ever – is built on Conax's powerful security technology platform and extensive experience .
So in other words ..IT Wont be broken ..never has and very likely never will either .
Best u can hope for is a brief FTA [ free to air ] period
or as Empb has mentioned if Keys remain static for a time but this is again highly unlikely .