http://lainyubrp2aabmxhepbttfdbl53dct2inqifs42buvpf6w44uiitbeqd.onion/blog/matrix.html
E2EE Now let's get back to encryption, I'm gonna shatter all your childhood dreams. Public groups are public, yeah. Majority of admins just disable that option, and all messages are stored unencrypted across the federation, there's no magic.