New: end-to-end encrypted group calls (audio and video)
New: agree/disagree feature also available in group chats
New: edit received images on the fly and send them right back (tap and hold > pencil icon)
New: send and receive messages with Perfect Forward Secrecy
Support for new chat server protocol
Minor bug fixes
Security improvements:
Improve chat server authentication protocol to prevent a payload confusion and a theoretical replay issue
Introduce an additional warning message if a connection from another device using the same Threema ID has been detected since the last time that the app was used
Disable compression of Threema Safe backups to rule out the theoretical possibility of a compression oracleThanks to Kenny Paterson, Matteo Scarlata and Kien Tuong Truong of the Applied Cryptography Group at ETH Zurich for bringing these issues to our attention
Consistent phone-number links in message text
Fixed a crash on certain Samsung devices running Android 11
Fixed an issue concerning the badge counter on certain Sony devices
Possible fix for an audio issue that might occur during voice calls on certain devices
Miscellaneous bug fixes and various other improvements
