"The decker entering the host have a valid mark (he basically checks out like a regular employee). The security decker might need a bit more to go on before he start tearing you a new one........"
Agreed - I was just trying to speed the example along
"Devices being slaved to the host does not mean you can interact with them. You still need marks on the device to do that... but being inside the host and the device being slaved to the host mean you can force or trick marks on the device as if you were physically attached to it with a cable."
Correct - my point was that if he he is inside the Host, he cannot see the icons of any device outside the host unless they are slaved to the host - for example he can see the camera, but not his friend's commlink.
I agree if he wants to do anything to the camera, he still needs to get a mark on it.
"As for overwatch score and convergence. I don't think you generate overwatch score when doing attack and sleaze actions while inside a host (but since you used at least an attack or sleaze action to get inside the host in the first place you will have an overwatch score that will increase every 15 minutes - and when it hit 40 the demiGOD will come to the front door and inform the host who you are. The host will automatically get 3 marks)."
Ok, I can see why you would say that given the following quote (notice the bold)
GOD doesn’t track personas inside a host, but it still
keeps tabs on the traffic to and from the host.
This
means your Overwatch Score doesn’t change when
you enter a host, and it continues to accumulate while
you’re in the host. If you’re in a host when you reach
convergence, you’re not burned and dumped like you
are out on the grid (Overwatch Score and Convergence,
p. 231). Instead, the host gets three marks on
you and starts deploying IC.
However what I think that means is that if you have an OS of 10 when you enter the Host, it doesn't reset, you still have a 10 - ie.it doesn't change when you enter it. If you then perform an attack action and the host scores 4 hits, your OS does increase to 14.