Abstract: An information reproducing apparatus (1) is provided with: a reading device (10) for reading contents data; an operating device (41) constructed to rotate depending on an operation of a user; a reproducing device (15) for reproducing the contents data, while determining reproduction speed and reproduction direction of the contents data on the basis of the operating signal which shows a rotating operation of the user performed on the operating device; and an adjusting device (22) for adjusting reproducing intensity of a plurality of data parts distributed in the contents data periodically or discretely during the reproduction of the contents data.

Abstract: An information recording apparatus (300) transmits identification information (Media ID) of an information recording medium (100) to an information distributing apparatus (200). The information distributing apparatus obtains an encryption key (disk key) from the identification information which is sent from the information recording apparatus, and encrypts record information (content). The information distribution apparatus distributes the encrypted record information (encrypted content). The information recording apparatus records the distributed encrypted record information into the information recording medium.