JPH0580184B2 - - Google Patents

Info

Publication number
JPH0580184B2
JPH0580184B2 JP1219375A JP21937589A JPH0580184B2 JP H0580184 B2 JPH0580184 B2 JP H0580184B2 JP 1219375 A JP1219375 A JP 1219375A JP 21937589 A JP21937589 A JP 21937589A JP H0580184 B2 JPH0580184 B2 JP H0580184B2
Authority
JP
Japan
Prior art keywords
key
group
recipient
recipients
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP1219375A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0382238A (ja
Inventor
Akito Umemoto
Hiroshi Watanabe
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
Nippon Electric Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Electric Co Ltd filed Critical Nippon Electric Co Ltd
Priority to JP1219375A priority Critical patent/JPH0382238A/ja
Publication of JPH0382238A publication Critical patent/JPH0382238A/ja
Publication of JPH0580184B2 publication Critical patent/JPH0580184B2/ja
Granted legal-status Critical Current

Links

JP1219375A 1989-08-25 1989-08-25 暗号化鍵配送方法 Granted JPH0382238A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1219375A JPH0382238A (ja) 1989-08-25 1989-08-25 暗号化鍵配送方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1219375A JPH0382238A (ja) 1989-08-25 1989-08-25 暗号化鍵配送方法

Publications (2)

Publication Number Publication Date
JPH0382238A JPH0382238A (ja) 1991-04-08
JPH0580184B2 true JPH0580184B2 (cs) 1993-11-08

Family

ID=16734434

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1219375A Granted JPH0382238A (ja) 1989-08-25 1989-08-25 暗号化鍵配送方法

Country Status (1)

Country Link
JP (1) JPH0382238A (cs)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1995009410A1 (fr) * 1993-09-29 1995-04-06 Pumpkin House Incorporated Dispositif et procede de chiffrement/dechiffrement et systeme de communication a chiffrement/dechiffrement
JP3561154B2 (ja) * 1997-12-26 2004-09-02 株式会社東芝 放送受信装置および契約管理装置
EP1111923A1 (en) * 1999-12-22 2001-06-27 Irdeto Access B.V. Method for operating a conditional access system for broadcast applications
JP4735828B2 (ja) * 2005-10-14 2011-07-27 株式会社メガチップス 画像記録装置の管理方法および画像記録装置

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4531020A (en) * 1982-07-23 1985-07-23 Oak Industries Inc. Multi-layer encryption system for the broadcast of encrypted information
DE3688855T2 (de) * 1985-05-01 1994-03-17 Gen Instrument Corp Satellitenübertragungssystem mit Direktübertragung.

Also Published As

Publication number Publication date
JPH0382238A (ja) 1991-04-08

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