Center for Internet Security Critical Security Controls
Site: https://www.cisecurity.org/
Standard : Critical Security Cotnrols v7.1
Cost: Free by providing email
(Optional) Aerospace Industry Association
Site: https://www.aia-aerospace.org
Standard: National Aerospace Standard (NAS) 9933
Cost: $60 – AIA Store
NIST Standards
NIST Cyber Security Framework
Site: https://www.nist.gov/cyberframework
NIST Risk Management Framework
Site: https://csrc.nist.gov/projects/risk-management/about-rmf
Open Web Application Security Project (OWASP) Top 10
Site: https://owasp.org/www-project-top-ten/