This IBM Support web page is where you can start for more information about IBM i OpenSSH and OpenSSL.
In this article, Dawn discusses how you can use the Administration Runtime Expert (ARE) to validate and document your security settings. The Administration Runtime expert can be a useful tool to aid in auditing and compliance.
This IBM Support document describes how to get started with the IBM i Authority Collection function.
This article reviews the hidden gems in the latest OS release, including several security-related enhancements.