Threema, messaging, security

We’ve covered Threema for Windows Phone before. The app was announced to be in development this past summer; we haven’t heard a peep about it since.

That silence ended today on Twitter with Threema finally announcing the release date for its secure messaging app:

Once it’s available for Windows Phone, Threema should be very simple to set up. Simply link your e-mail address and/or mobile phone number so other people can find you to synchronize your contacts, after which you’ll be able to start exchanging secure messages. Your secret keys never leave your device, meaning even Threema won’t be able to decrypt your messages, whether they’re asked to do so or not.

There are two color levels used when verifying your contacts:

  • Orange – When you synchronize your contacts, the public keys will be retrieved from the server, which has verified that they belong to the respective person via SMS or e-mail validation. This is the “orange” verification level.
  • Green – Recommended verification option. Threema lets you easily verify by scanning a QR code (which contains the ID and public key) directly from the mobile phone of another user. Once scanned, the verification level will change to “green”.

Are you looking forward to Threema for Windows Phone?

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By Josh Robert Nay

Josh Robert Nay is the founder and Editor-in-Chief of TruTower. He has worked in the telecommunications industry since 2003 and specializes in GSM based technology. He also uses (too many) VoIP apps and is a long-time user of BlackBerry, Android, and Windows Phone. He adores anything having to do with space exploration and writing. In addition to the links below, he can be found on LinkedIn and can also be found on his website at