digicert – Mitigating Risk: The Importance of Considering Your Certificate Practices

SANS Whitepaper – Building and Managing a PKI Solution

NIST SP 800-77 Rev 1: Guide to IPSec VPNs

Amazon Web Services – How to Protect Data in Transit

CISA – Enhanced Visibility and Hardening Guidance for Communications Infrastructure

NetworkWorld – Transport Layer Security (TLS)

NIST SP 800-113: Guide to SSL VPNs