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Threema 4.8.5 for iOS

  • The agree/disagree feature is now also available in group chats

  • To celebrate Threema turning ten, we have festooned the app icon. The icon can be changed back to the default or to a legacy version in the settings

  • 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

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