Published guidance
NCSC’s guidance is aimed at helping UK government departments, agencies, the critical national infrastructure and its supply chains protect their information and systems. It also has relevance for local government and the wider public sector.https://www.ncsc.gov.uk/index/guidance?page=1
ENISA
The European Union Agency for Network and Information Security (ENISA) is a centre of expertise for cyber security in Europe.https://www.enisa.europa.eu/topics
Expectations for Computer Security Incident Response
https://tools.ietf.org/rfc/rfc2350
Internet Security Glossary
https://www.ietf.org/rfc/rfc2828.txt
PKCS #10: Certification Request Syntax Specification Version 1.7
https://tools.ietf.org/rfc/rfc2986.txt
Guidelines for Evidence Collection and Archiving
https://www.ietf.org/rfc/rfc3227.txt