2. Because of the long history of Jabber (since 1999!), and huge advancements in cryptography, encryption in XMPP has many options. So far, so good, but most clients are still on #OMEMO 1, which has some problems, and only few clients already have OMEMO 2 (#Kaidan by @kaidan, #Libervia by @Goffi, soonโฝ also #Conversations_im by @daniel, #ConverseJS by @jcbrand and #JabberEl by @[email protected]). And there is no standard way to move decrypted message from an old device to a new one!