Add ps1 signature verification

Author: kgremban

articles/iot-edge/how-to-install-iot-edge-windows.md

@@ -8,7 +8,7 @@ ms.reviewer: veyalla
 ms.service: iot-edge
 services: iot-edge
 ms.topic: conceptual
-ms.date: 02/21/2020
+ms.date: 03/12/2020
 ms.author: kgremban
 ---
 # Install the Azure IoT Edge runtime on Windows
@@ -224,6 +224,18 @@ The Uninstall-IoTEdge command does not work on Windows IoT Core. To remove IoT E
 
 For more information about uninstallation options, use the command `Get-Help Uninstall-IoTEdge -full`.
 
+## Verify installation script
+
+The installation commands provided in this article use the Invoke-WebRequest cmdlet to request the installation script from `aka.ms/iotedge-win`. This link points to the`IoTEdgeSecurityDaemon.ps1` script from the most recent [IoT Edge release](https://github.com/Azure/azure-iotedge/releases). You can also download this script, or a version of the script from a specific release, to run the installation commands on your IoT Edge device.
+
+The provided script is signed to increase security. You can verify the signature by downloading the script to your device then running the following PowerShell command:
+
+```powershell
+Get-AuthenticodeSignature "C:\<path>\IotEdgeSecurityDaemon.ps1"
+```
+
+The output status is **Valid** if the signature is verified.
+
 ## All installation parameters
 
 The previous sections introduced common installation scenarios with examples of how to use parameters to modify the installation script. This section provides reference tables of the common parameters used to install, update, or uninstall IoT Edge.