The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 01, 2012
Filed:
Jun. 17, 2010
Ryuji Ishiguro, Tokyo, JP;
Yoshitomo Osawa, Kanagawa, JP;
Yoshio Osakabe, Kanagawa, JP;
Makoto Sato, Tokyo, JP;
Hisato Shima, Tokyo, JP;
Tomoyuki Asano, Kanagawa, JP;
Ryuji Ishiguro, Tokyo, JP;
Yoshitomo Osawa, Kanagawa, JP;
Yoshio Osakabe, Kanagawa, JP;
Makoto Sato, Tokyo, JP;
Hisato Shima, Tokyo, JP;
Tomoyuki Asano, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
The invention provides an enciphering apparatus and method, a deciphering apparatus and method and an information processing apparatus and method by which illegal copying can be prevented with certainty. Data enciphered by a 1394 interface of a DVD player is transmitted to a personal computer and a magneto-optical disk apparatus through a 1394 bus. In the magneto-optical disk apparatus with which a change to a function is open to a user, the received data is deciphered by a 1394 interface. In contrast, in the personal computer with which a change to a function is open to a user, the enciphered data is deciphered using a time variable key by a 1394 interface, and a result of the decipherment is further deciphered using a session key by an application section.