If you replace "security by obscurity" with "Kerckhoffs's principle", yes, absolutely! The problem with using regular everyday obscurity is that it usually has

If you replace "security by obscurity" with "Kerckhoffs's principle", yes, absolutely! The problem with using regular everyday obscurity is that it usually has a small state space and makes for terrible security, but people will treat it like it is cleverly hidden and safe from attackers If I guess the IPv4 you're thinking of between 0 and 2↑32, ready or not, you win a free port scan