In 2018, MSIX was announced by Microsoft as the new universal package format for Windows 10 apps with the later support on desktop, mobile, and other Windows 10 devices.

Digitally signing your application is not only mandatory, it is an essential step to making your software secure and trustworthy.

You've finished building your MSIX application, and it's time to share it with the rest of the world.

Starting with January 1st, 2016 Microsoft is implementing a mandatory update of the Digital Signature system from SHA-1 to SHA-2 in order to deal with the decreasing security of the SHA-1 digital signatures. A limited dual-signing system is supported for backwards compatibility.