According to one embodiment, a storage medium comprises an encrypted content, key
management information which is updated whenever necessary and includes a media key
block including encrypted media keys obtained by encrypting a media key which is a base of
an authentication key used for mutual authentication with another apparatus by using
different device keys, and first and second application keys which encrypt the title keys for
each application of the content and are alternately updated and encrypted when the key …

An information processing apparatus includes a first signing unit which digitally signs device
information and environ ment information, a first generator which generates a first digital
envelope as data including the signed device informa tion and the signed environment
information, a second sign ing unit which digitally signs biometric authentication infor mation
and the first digital envelope, a second generator which generates a second digital
envelope as data including the signed biometric authentication information and the signed …