There are provided an information recording medium, and an information
processing apparatus and method by which content usage in compliance with
copyright protection is made possible in information processing devices
such as a CD player and a PC. In the information recording medium, a
first data storage area on which a copying prevention process is
performed, and a second data storage area in which is stored an encrypted
content file containing encrypted content, and encrypted key data such
that key data for use in a decryption process is encrypted and which can
be decrypted only in a device having a license are set. It becomes
possible to play back the recorded content of a first data recording
field in a playback device such as a CD player, and even in an
information processing device, such as a PC, it is possible to decrypt
and play back encrypted content of a second data recording field under
the condition of obtaining a license.