Install gnomint by entering the following commands in the terminal:
sudo apt update sudo apt install gnomint
Description:
X.509 Certification Authority management tool for GNOME
gnoMint is a tool for easily creating and managing certification authorities. It provides fancy visualization of all the pieces of information that pertain to a CA, such as X.509 certificates, CSRs, and CRLs. . gnoMint is currently capable of managing a CA that emits certificates that are able to authenticate people or machines in VPNs (IPSec or other protocols), secure HTTP communications with SSL/TLS, authenticate and cipher HTTP communications through Web-client certificates, and sign or crypt email messages.
Homepage: http://gnomint.sourceforge.net/
Version: 1.2.1-8
Section: universe/gnome