Here is part 1 of 3 for building a Zen Secure Node:
https://blockoperations.com/build-zencash-secure-node-part-1-prepare-vps/

Here is part 2 (just published)
https://blockoperations.com/build-zencash-secure-node-part-2-build-zen-node/

I will publish Part 3 after the Zen Developers add the Secure Node functionality to the software.

Secure Node functionality is still a work in progress. Right now there are no secure nodes.