Title:
情報処理装置、および情報処理方法、並びにプログラム記憶媒体
Document Type and Number:
Japanese Patent JP4622087
Kind Code:
B2
Abstract:
In an information processing system and method which enables detection processing of a revoked entity using an enabling key block (EKB), a device or a service provider as a revoked entity is determined on the basis of the enabling key block (EKB) used for key distribution in a tree structure. ID which enables position identification in the hierarchical key distribution tree is stored in a public key certificate and tracing processing using a tag of the enabling key block (EKB) is executed on the basis of the ID acquired from the public key certificate, thus determining whether or not the ID is of a position where EKB processing (decryption) is possible and determining the presence/absence of revocation of an entity corresponding to the ID.
Inventors:
Ryuji Ishiguro
Tomoyuki Asano
Tomoyuki Asano
Application Number:
JP2000341431A
Publication Date:
February 02, 2011
Filing Date:
November 09, 2000
Export Citation:
Assignee:
ソニー株式会社
International Classes:
H04L9/08; G06F21/00; G11B20/00; H04L9/32
Domestic Patent References:
| JP10040255A | ||||
| JP11187013A | ||||
| JP11205305A | ||||
| JP2000031922A |
Foreign References:
| US5949877 | ||||
| US6049878 |
Other References:
5C Digital Transmission Content Protection White Paper,1998年 7月14日,Revision 1.0,URL,http://www.dtcp.com/data/wp_spec.pdf
The VersaKey framework: versatile group key management,IEEE Journal on Selected Areas in Communications,1999年 9月,Volume: 17, Issue: 9,p.1614-1631
Secure group communications using key graphs,EEE/ACM Transactions on Networking,2000年 2月,Volume: 8, Issue: 1,p.16-30
The VersaKey framework: versatile group key management,IEEE Journal on Selected Areas in Communications,1999年 9月,Volume: 17, Issue: 9,p.1614-1631
Secure group communications using key graphs,EEE/ACM Transactions on Networking,2000年 2月,Volume: 8, Issue: 1,p.16-30
Attorney, Agent or Firm:
Eiji Yamada
Masaaki Miyata
Toshio Sawada
Masaaki Miyata
Toshio Sawada