Patent ID: 7203968

Claim:
An information recording device for recording information on a recording medium, said information recording device comprising: an input/output interface; and means for selectively executing information recording using a cognizant mode which analyzes embedded copy control information in a data part of a packet having a header part and the data part, and information recording using a non-cognizant mode which does not analyze the embedded copy control information, wherein: when the information recording using the cognizant mode is selected, said means executes the generation of record information in which a block seed including copy control information based on the embedded copy control information is added to block data formed by at least one packet and is encrypted by a first encryption key, the first encryption key being generated using a cognizant key; and when the information recording using the non-cognizant mode is selected, said means executes the generation of record information in which a block seed including copy control information based on an encryption-mode indicator as copy control information included in the packet is added to said block data and is encrypted by a second encryption key, the second encryption key being generated using a non-cognizant key.