Hello, there will be particular hardware requirements for running a secure node, as far as it is known?

There will be some higher hardware requirements for Secure Node setup. We cannot specify those requrements becase we are in testing phase.

Is a secure node the same as a masternode?

Where can we find info or a doc how to setup a masternode?

They are similar but not the same accent is thrown on security of network.

https://www.youtube.com/watch?v=lLur-QhTR5I&t=1845s
Watch this video from 14:52 you will get latest informations about nodes