Standards
IETF, eIDAS, CA/B Forum, NIST, ISO and ETSI references — educational reading.
RFC X.509 and IETF standards
IETF references for certificates, extensions and related TLS profiles.
eIDAS regulation (EU)
European framework for trust services, trust lists and cross-border recognition.
CA/B Forum Baseline Requirements
Common requirements for public TLS CAs, validity periods and issuance controls.
NIST cryptography references
NIST publications on approved algorithms, usage guidance and post-quantum transition.
PKI governance and ISO/IEC 27001
How information security management connects with operating a PKI.
ETSI and electronic signature profiles
EN 319 102/132/142 family and alignment of PAdES/CAdES/XAdES profiles on the European market.