When encrypted, audio streams For example, a key is not usable for decryption if its license has expired.
Other Media Keys objects, CDM instances, and media elements Unless otherwise stated, key refers to a decryption key that can be used to decrypt blocks within media data. A key is associated with the session used to provide it to the CDM.
License/key exchange is controlled by the application, facilitating the development of robust playback applications supporting a range of content decryption and protection technologies.
This specification does not define a content protection or Digital Rights Management system.
Implementers should pay attention to the mitigations for the security and privacy threats and concerns described in this specification.
In particular, the specification requirements for security and privacy cannot be met without knowledge of the security and privacy properties of the Key System and its implementation(s).