For our Infrastructure and Security Setup we have chosen a multi-tier system of servers. We have sentry, backup and open API servers that build the first front, while the validator servers are hidden and protected behind those, protected from DDOS or direct attacking and with a KMS of our choice. With building this infrastructure, we keep in mind to distribute our servers split with own managed servers and servers hosted by different cloud providers. This enables us to scale geographically as well as in storage, computing and bandwidth.