---
title: "DRM License Server 5.9.3"
description: "Enhanced License Renewal for FairPlay and PlayReady DRM:"
---
> For the complete documentation index, see [llms.txt](/llms.txt).

- **Enhanced License Renewal for FairPlay and PlayReady DRM:**\
    The license renewal mechanism has been extended to support **real-time enforcement scenarios** for **FairPlay** and **PlayReady** DRM.\
    With this update, the server can dynamically evaluate conditions such as blacklisted users during license renewal, enabling **immediate blocking of live streams** if policy violations are detected mid-playback.\
    This enhancement provides content providers with finer control over stream access, particularly in subscription or pay-per-view models where real-time compliance is critical.

- **Improved License Cipher Logic for PlayReady DRM:**\
    The internal logic for applying **License Cipher** to PlayReady DRM has been improved to ensure more reliable and secure handling of encrypted license requests and responses.\
    These refinements enhance compatibility with customized encryption workflows and strengthen protection against unauthorized license acquisition or key extraction attempts.

- **Bug Fix: Conflict Between Blacklist and Concurrent Stream Limiting (CSL) in FairPlay and PlayReady DRM:**\
    A bug has been resolved that caused unpredictable behavior when both **blacklisting** and **CSL (Concurrent Stream Limiting)** policies were active for FairPlay and PlayReady.\
    In certain cases, the conflict between these enforcement features led to incorrect playback denial or failure to block unauthorized sessions.\
    This fix ensures both features can now operate together, enforcing streaming policies as intended without mutual interference.