IoT, Iot Security, Cybersecurity, Mqtt, Cryptography.
this is the best option are given here and here in the context of SSH keys (it’s the same idea, really), and here with more general cryptographic context. openssl genpkey -algorithm ED25519 -out rootCA.key openssl req -x509 -new -key rootCA.key -days 3650 \ -subj '/CN=Test' -out rootCA.crt Here