This document discusses security considerations for cloud computing instances, networking, and storage. It recommends using bastion servers for CLI access with key-based authentication over secure protocols. For instances, it suggests using LTS OS releases, security patches, and HIDS for critical hosts. Networking advice includes using subnets for applications, public subnets only for public-facing systems, and private subnets with NAT for non-public systems. The document also recommends encrypting sensitive stored data with role-based access controls and logging, and storing authentication materials securely.