Patent ID: 8650410

Claim:
A musical content data processing apparatus comprising: a receiving portion for receiving a musical content package file which includes musical contents in which a plurality of musical content material data sets each of which is given a piece of identification information and is encrypted are recorded, and encrypted location information for identifying respective locations at which the respective musical content material data sets are situated in the musical content package file, the respective locations of the musical content material data sets being correlated with the respective identification information pieces of the musical content material data sets; a storing portion for storing the musical content package file received by the receiving portion; a location identifying portion for decrypting the location information included in the musical content package file stored in the storing portion, and identifying, on the basis of the decrypted location information, a location which is correlated with an identification information piece given to a target musical content material data set which is to be used; a musical content material extracting portion for extracting, on the basis of the location identified by the location identifying portion, the target musical content material data set which is to be used from the musical content package file stored in the storing portion; and a musical content material decrypting portion for decrypting the musical content material data set extracted by the musical content material extracting portion.