Other vulnerabilities have been uncovered as well. In a separate incident, a security researcher successfully extracted private ECC keys from a Windows PlayReady client, compromising the client's identity and enabling unauthorized access to protected content. The researcher also developed a tool that could read decryption keys in plaintext under Windows 10 and 11, allowing full-HD movies to be downloaded and played outside of authorized players.

On desktop systems using Software DRM, reverse engineers use advanced debugging tools, hook into dynamic link libraries (DLLs), or leverage side-channel attacks to intercept the Content Encryption Key as it is loaded into memory.

The official decryption process relies on the client's CDM and a secure communication channel with the license server:

For developers and researchers, understanding these mechanisms is essential for building secure media applications and for conducting responsible security research. As the streaming industry continues to grow, the importance of robust DRM systems like PlayReady will only increase, as will the efforts to understand, analyze, and test their boundaries.