> For the complete documentation index, see [llms.txt](https://blog.syselement.com/home/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://blog.syselement.com/home/courses-notes/practical-networking/practical-tls/3-x509-certificates-keys.md).

# x509 Certificates and Keys