unknown protection

[ju440]

Hi guys,
I tried CloneyXXL (latest version) with "Port Royale"
by ascaron - but it couldn't detect any protection.
But there obviously *is* one.
(a 1:1 copy with clonecd4 doesn't work)

By starting the game a tiny window pops up
and says something like: "verifying original cd"

Does someone know what kind of protection this is?


bye,
Ju