---
title: "DRM License Cipher UWP SDK 1.0.0"
description: "First Release of DRM License Cipher SDK for UWP (Universal Windows Platform)"
---
> For the complete documentation index, see [llms.txt](/llms.txt).

## Initial Release

- **First Release of DRM License Cipher SDK for UWP (Universal Windows Platform)**

  - Introduced the **UWP version** of the DRM License Cipher SDK, designed to prevent unauthorized extraction of DRM content keys from **PlayReady client applications** running on the Windows platform.

  - This release enables secure license acquisition workflows by **encrypting the license challenge request** and validating the request authenticity on the server.

  - The SDK leverages platform-level protections and white-box cryptography to help ensure **robust security against piracy and key leakage**.

  - It is designed to work seamlessly with existing PlayReady implementations, requiring minimal integration effort.