NyxTalk

Download NyxTalk

Your organisation's secure messaging app.

Once installed, open the enrollment link your administrator gave you: it ties the app to your organisation's server. Without this link, the app cannot connect to anything.

Windows 10 and 11 (64-bit)

Version 0.2.40 · Size 6.6 MB

Download
  1. Extract the folder (right-click → Extract All).
  2. Run NyxTalk.exe. It is signed by IT-SECURE Luxembourg: Windows shows it in its properties (Digital Signatures tab).

SHA-256 fingerprint

24ad8091ed5f05de2161886fc0f2ed2b5b0c4730c2c972f4519a28ae0fd946df

Compare it with the one your administrator gave you.

Check the fingerprint, in PowerShell:

Get-FileHash $env:USERPROFILE\Downloads\NyxTalk_Client_0.2.40_x64.zip

macOS 12 or later (Apple silicon and Intel)

Version 0.2.41 · Size 7.5 MB

Download
  1. Open the archive, then drag NyxTalk into the Applications folder.
  2. First launch: macOS blocks it, because the app is not notarized by Apple yet. Open System Settings → Privacy & Security, then click “Open Anyway”.

SHA-256 fingerprint

4f4a74a93eb053f81a39e894ce4d7d631fc7b3ce0bd3e346a7731c3d2d154e77

Compare it with the one your administrator gave you.

Check the fingerprint, in Terminal:

shasum -a 256 ~/Downloads/NyxTalk_Client_0.2.41_macos.zip

Android 9 or later

Version 0.2.41 · Size 13.3 MB

Download
  1. Download the file on the phone, then open it.
  2. Android asks to allow installing apps from your browser: allow it for this installation, then tap Install.
  3. Later updates are installed from NyxTalk (Settings → Updates).

SHA-256 fingerprint

821701eb227329abe089dfa6c08fdc15b4266f8f4b428d40bcd8b7d0abfdcb2a

Compare it with the one your administrator gave you.

The app's signing certificate (SHA-256), checkable with apksigner verify --print-certs:

89:1C:DF:B2:68:03:9E:E3:67:68:C0:CE:C6:E5:A9:B0:A7:4B:90:FD:B3:9E:DD:54:EA:40:C9:1C:CF:CC:8A:20