proofpoint – What is Email Filtering?

Gartner – Email Security Platforms Reviews and Ratings

CSO – What are DMARC, SPF and DKIM? How to master email security with these protocols

SANS Whitepaper – Securing Sensitive Data: Understanding Federal Information Processing Standards (FIPS)

SANS – End User Encryption Key Protection Policy

NIST SP 800-175B Rev 1: Guideline for Using Cryptographic Standards in the Federal Government

NIST SP 800-111: Guide to Storage Encryption Technologies for End User Devices

YouTube – Pros & Cons of Full Disk Encryption