The key in hex string format.
Example: 100b6c20940f779a4589152b57d2dacb
OptionalkidThe key ID in hex string format.
Example: eb676abbcb345e96bbcf616630f1a3da
Optional in single-key scenarios where all tracks of the content are encrypted with one single key.
Required in multi-key scenarios to allow key selection when tracks are encrypted with different keys.
Defines a decryption key.
Optionally specifies the key ID for the given key. This is needed in multi-key scenarios as it allows the player to select the correct key when audio/video tracks are encrypted with different keys.