Title:
REPRODUCTION MANAGEMENT DEVICE, REPRODUCTION MANAGEMENT METHOD, REPRODUCTION MANAGEMENT PROGRAM, CONTENT RECEPTION SYSTEM AND CONTENT DISTRIBUTION SYSTEM
Document Type and Number:
Japanese Patent JP2016167766
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide a reproduction management device and a content distribution system capable of realizing the preview with high security at low cost.SOLUTION: An IC card (reproduction management device) 3 for receiver receiving a content signal encrypted using a first key Ks that is updated in a predetermined update cycle, and a first control signal ECM obtained by encrypting the information indicating the Ks the reproducible time (Tpre) of the encrypted content signal, includes an interface for receiving the ECM from the receiver, a first decoding section 34 for decoding the ECM, and restoring the reproducible time (Tpre) of the Ks and encrypted content signal, and a control section 35 for determining whether or not the Ks is outputted to the receiver, based on the reproducible time (Tpre) of the encrypted content signal, and the update cycle (Tud) of the key, and outputting the restored Ks to the receiver, when a determination is made that the Ks is outputted.SELECTED DRAWING: Figure 4
Inventors:
OYA TOMOYUKI
MORIZUMI TOSHIMI
SEKI YURI
MORIZUMI TOSHIMI
SEKI YURI
Application Number:
JP2015047433A
Publication Date:
September 15, 2016
Filing Date:
March 10, 2015
Export Citation:
Assignee:
SMART MOBILE BROADCASTING TECH INC
International Classes:
H04N21/4623; H04L9/08
Domestic Patent References:
| JP2011109311A | 2011-06-02 | |||
| JP2002366442A | 2002-12-20 | |||
| JP2013172266A | 2013-09-02 | |||
| JPH11308595A | 1999-11-05 | |||
| JP2011109311A | 2011-06-02 | |||
| JP2002366442A | 2002-12-20 | |||
| JP2013172266A | 2013-09-02 |
Foreign References:
| WO2013146865A1 | 2013-10-03 |
Attorney, Agent or Firm:
Seiji Ohno
Matsuno Chihiro
Matsuno Chihiro