: This is the crucial bit. The License Response doesn't contain the raw decryption key. Instead, it contains an encrypted data structure that only the secure hardware or software CDM can use to derive the actual 16-byte content key. Security Levels: SL2000 vs. SL3000 Not all decryption is created equal. PlayReady uses Security Levels (SL) to define how "hard" the decryption environment is: SL2000 (Software-based)
The license server verified the client’s certificate and checked: playready drm decrypt
. To ensure this key is not intercepted, the server encrypts the CEK using the client’s public key. Once the device receives the license, it moves the data into a Trusted Execution Environment (TEE) Secure Processor : This is the crucial bit
To understand "decryption," you must first understand the encryption chain. playready drm decrypt