AWS prescriptive-guidance documentation change
Summary
Updated IoT security guidance with improved structure, clarified service references, and added links to AWS services. Changed headings to subheadings (###), expanded service acronyms with full names and links, and moved document to IoT-specific directory.
Security assessment
Changes enhance existing security documentation by adding explicit references to security services (AWS KMS, AWS Signer) with links, but don't address any specific vulnerability. Improvements focus on clarifying security best practices for device identity management and data protection.