How to create a self signed certificate using IBM GSKKYMAN which is a component of z/OS to use with Sterling Connect:Direct for z/OS
Links embedded in this video:
Slide 17: https://www.iso.org/obp/ui/#search
This presentation is also available in PDF: ftp://ftp.software.ibm.com/software/iea/content/com.ibm.iea.scd4z/scd4z/5.1/content/scd4z_GSKKYMAN_Part_2_Creating_a_Self_Signed_Certificate_.pdf