1. sslserver

TLS encryption for Client/Server IPv6/IPv4 communication https://www.fehcom.de/ipnet/ucspi-ssl/sslserver.html

1.1. djbware

Erwin Hoffmann : Current projects and maintained applications

I shall continue the project and put the material (in german language) chapterwise as PDF documents online.

SMTP and Transport Layer Security (TLS) [Tutorial] https://www.fehcom.de/qmail/smtptls.html

ucspi-ssl