Patent ID: 6628591
Filing Date: 2003-09-30
Classification: G11B

Abstract:
A recording apparatus, comprising:recording means for recording information played back from a first recording medium into a second recording medium, said recording means comprising a first security block having an encryption circuit and an authentication processing circuit, said first recording medium comprising a second security block; judgment means for forming a judgment as to whether said first recording medium is allowed to be dubbed or prohibited from being dubbed; random-number generation circuit means for generating a session key to be shared with said second security block if said judgement formed from said judging means indicates that said first recording medium is allowed to be dubbed; and control means for inhibiting said recording means from recording information played back from said first recording medium into said second recording medium when said judgment formed by said judgment means indicates that said first recording medium is prohibited from being dubbed; wherein said first security block sends first authentication data to said second security block which generates second authentication data and adds this second authentication data to the first authentication data and sends both authentication data to said recording means to form said judgment.