Info about secure nodes from
https://securenodes.na.zensystem.io/aboutSecure Nodes employ encrypted communication to other nodes and wallets. They also are intended to provide services applications like mobile wallets at a later time.
Each of the Secure Nodes connect to this system which tracks the state of the node. This server helps ensure a healthy network by periodically sending challenges to nodes to prove capability. The tracking system is completely independent of any ZenCash transaction processing. It provides a means for node operators to share a small portion of the block generation rewards.
Payments based on a 3.5% percentage of the mined block reward are split between all Secure Nodes that adhere to the criteria below.
Situations such as down time, low stake balance and other exceptions are factored into the payment.
For more information visit
https://zensystem.io and
https://securenodes.na.zensystem.io/about