Patent ID: 7266691
Filing Date: 2007-09-04
Classification: G06F

Abstract:
1. A method for furnishing key data to a data processing apparatus, comprising: receiving first key data at said data processing apparatus on which a contents reproducing program is installed; using said first key data to copy first contents data stored originally in a compact disc for storage in said data processing apparatus, and using said first key data to perform authentication between said data processing apparatus and a portable reproducing apparatus connected to said data processing apparatus before transmitting/receiving said first contents data between said data processing apparatus and said portable reproducing apparatus; receiving second key data at said data processing apparatus, said second key data different from said first key data; and using said second key data to download the second contents data furnished from said contents server for storage in said data processing apparatus, said second key data also being used to perform authentication between said data processing apparatus and said portable reproducing apparatus before transmitting/receiving said second contents data between said data processing apparatus and said portable reproducing apparatus, wherein the said portable reproducing apparatus holds the first to ith key data updated in generation from the first generation to the ith generation, where i is an integer not smaller than 2, and said portable reproducing apparatus and the contents reproducing program performs authentication using an authentication key of the same generation.