There are no known security issues with "Siacs OMEMO" / OMEMO v0.3¹ despite of what some very loud Signal fans would like you to believe. It has been audited by a third party² who took a longer look at it than all of the Signal fans combined.

Yes, #OMEMO v0.7+ (or TWOMEMO 😜) is a cleaner spec with more features (most notably Stanza Content Encryption). That’s why we wrote it. I’m a co-author. That doesn’t mean v0.3 is insecure.

¹: xmpp.org/extensions/attic/xep-…
²: conversations.im/omemo/audit.p…

#XMPP