A data recording apparatus capable of preventing easily copying of information is disclosed with which, even if information is copied, the copied information cannot be reproduced, the data recording apparatus having a terminal to which encoder ID specific for the data recording apparatus is input, a...http://www.google.es/patents/US7366700?utm_source=gb-gplus-sharePatente US7366700 - Method and apparatus for transmitting and receiving a decoding key encoded with specific information to decode encrypted information of a record medium
Method and apparatus for transmitting and receiving a decoding key encoded ...
