While no audit can prove the complete absence of any vulnerabilities in a software, this audit left the impression that Threema takes the security and privacy of their users very seriously. Furthermore, the audit revealed no deviations from the Threema Cryptography Whitepaper or the claims made by the Threema website.

To my knowledge, there's no security audit. I'm not sure how they handle metadata, which is a huge deal (to me, at least) and the reason why I personally use Threema. The guys behind Wire are Skype developers, which doesn't exactly inspire confidence since Sykpe is/was one of the least secure messengers around. Mozilla pens open letter to German policymakers over Jun 14, 2019 Managing your privacy: Communication

According to the Federal Administrative Court, the state was wrong to demand access to the metadata from the chat app Threema. It is a victory for the Swiss Internet industry against state surveillance: On May 19, the Federal Administrative Court ruled that the Swiss chat provider Threema does not have to assume far-reaching surveillance tasks for the state.

eeee ee Pa a e e 4 21 Page 5 • Nickname, chosen by the user or set by the employer. • Threema ID, app version, timestamp of the latest license check. • If using «custom contacts»: List of included contacts, consisting of first name, surname, and Threema ID. Data protection regulations are becoming more stringent to combat threats to our security – and rightfully so! That’s why we set out to develop a messaging platform that’s 100 % confidential and secure. 💁‍♀️🔐 We want you to feel totally confident using Siilo. Let us explain our approach to security and compliance standards. Threema Web: if you go to web.threema.ch you can use your Threema account on the web, your cellphone needs to be online and scan a QR code to make that happen; Threema Video Call: So far Threema has no video calling option, however, this is now in beta and I am keeping an eye on it!

According to the Federal Administrative Court, the state was wrong to demand access to the metadata from the chat app Threema. It is a victory for the Swiss Internet industry against state surveillance: On May 19, the Federal Administrative Court ruled that the Swiss chat provider Threema does not have to assume far-reaching surveillance tasks for the state.

Furthermore, well-established experts audit Threema periodically. Headed by Prof. Sebastian Schinzel, the Lab for IT Security of the Münster University of Applied Sciences has conducted the latest audit in March 2019. With considerable effort and all the required technical expertise, the Android and the iOS app as well as Threema Safe were Reference Sheet Privacy and Security - Threema eeee ee Pa a e e 4 21 Page 5 • Nickname, chosen by the user or set by the employer. • Threema ID, app version, timestamp of the latest license check. • If using «custom contacts»: List of included contacts, consisting of first name, surname, and Threema ID. • This information can be accessed using an API. Analytics made by the provider • Assessment whether the amount of licenses is The 2020 review of Messaging Service Providers: Threema