Title:
【発明の名称】データセットの完全性および真正性の保証方法および装置
Document Type and Number:
Japanese Patent JP2003506963
Kind Code:
A
Abstract:
Method and a device for guaranteeing the integrity and authenticity of data transmitted between a management center and one or several receiver units, wherein each receiver unit comprises a decoder (IRD) and a security unit (SC) and means for communicating (NET, REC) with the management center. The method consists in calculating a check information (Hx) representative of the result of a unidirectional and collision-free function, performed on all or part of the transmitted data and in transmitting the result to the management center for verification. The center will be able to inform the decoder concerning the authenticity of the data through return channels or through the main channel.
Inventors:
Hill michael john
Nikola Christoph
Sasserie Marco
Nikola Christoph
Sasserie Marco
Application Number:
JP2001515576A
Publication Date:
February 18, 2003
Filing Date:
June 23, 2000
Export Citation:
Assignee:
Nagra vidion sr
International Classes:
G09C1/00; H04L9/32; H04N21/4367; (IPC1-7): H04L9/32; G09C1/00; H04N7/16; H04N7/167
Domestic Patent References:
| JPH10200522A | 1998-07-31 | |||
| JPH11205767A | 1999-07-30 | |||
| JPH09237183A | 1997-09-09 | |||
| JPH03210843A | 1991-09-13 | |||
| JPH0695591A | 1994-04-08 |
Foreign References:
| WO1998003026A1 | 1998-01-22 |
Attorney, Agent or Firm:
Nobuyuki Matsubara (4 others)