Title:
データ再生装置、それを用いた端末装置、および再生方法
Document Type and Number:
Japanese Patent JP4535571
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a data reproducing device that can reproduce encrypted contents data even when a couple of class keys are included in inhibit class data. SOLUTION: A mobile phone 100 includes an authentication data storage section 1500 and a Kpx storage section 1502. The authentication data storage section 1500 includes two authentication data KPp1//Crtf1}Kpma and KPp2// Crtf2)Kpma. The Kpx storage section 1502 stores private decoding keys Kp1, Kp2 corresponding to public encryption keys KPp1, KPp2 included in the authentication data. A controller 1106 gives the authentication data to a memory card 110 via a memory interface 1200 in the order of the KPp1//Crtf1}Kpma and the KPp2//Crtf2} Kpma to authenticate the memory card 110 in the case of data reproduction.
Inventors:
Yoshihiro Hori
Haruya Ota
Haruya Ota
Application Number:
JP2000204023A
Publication Date:
September 01, 2010
Filing Date:
July 05, 2000
Export Citation:
Assignee:
Sanyo Electric Co., Ltd.
International Classes:
G06F12/14; H04L9/32; G06F21/10; G06F21/62; G10L19/00; H04L9/14; H04N5/91; H04N5/92; H04N7/167; H04N7/173; H04N21/239; H04N21/266; H04N21/418; H04N21/4367; H04N21/6334
Domestic Patent References:
| JP10512074A | ||||
| JP360546A |
Other References:
Bruce Schneier,Attacking Certificates with Computer Viruses,Crypto-Gram Newsletter,1999年,April 15, 1999,URL,http://www.schneier.com/crypto-gram-9904.html
Attorney, Agent or Firm:
Kuro Fukami
Toshio Morita
Hidehiko Ito
Yutaka Horii
Toshio Morita
Hidehiko Ito
Yutaka Horii