JP2009118529A - キー階層により保護されたシステムを安全保護する方法 - Google Patents

キー階層により保護されたシステムを安全保護する方法 Download PDF

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Publication number
JP2009118529A
JP2009118529A JP2009042235A JP2009042235A JP2009118529A JP 2009118529 A JP2009118529 A JP 2009118529A JP 2009042235 A JP2009042235 A JP 2009042235A JP 2009042235 A JP2009042235 A JP 2009042235A JP 2009118529 A JP2009118529 A JP 2009118529A
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Japan
Prior art keywords
key
hierarchy
encryption
subsets
keys
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JP2009042235A
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Japanese (ja)
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JP2009118529A5 (enExample
Inventor
Joerg Schwenk
シュヴェンク，ユルグ
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Deutsche Telekom AG
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Deutsche Telekom AG
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Priority to JP2009042235A priority Critical patent/JP2009118529A/ja
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Publication of JP2009118529A5 publication Critical patent/JP2009118529A5/ja
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JP2009042235A 2009-02-25 2009-02-25 キー階層により保護されたシステムを安全保護する方法 Pending JP2009118529A (ja)

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JP2009042235A JP2009118529A (ja) 2009-02-25 2009-02-25 キー階層により保護されたシステムを安全保護する方法

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JP2009042235A JP2009118529A (ja) 2009-02-25 2009-02-25 キー階層により保護されたシステムを安全保護する方法

Related Parent Applications (1)

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JP2000526050A Division JP4351386B2 (ja) 1996-11-28 1997-12-18 キー階層により保護されたシステムを安全保護する方法

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JP2009118529A true JP2009118529A (ja) 2009-05-28
JP2009118529A5 JP2009118529A5 (enExample) 2009-07-09

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JP2009042235A Pending JP2009118529A (ja) 2009-02-25 2009-02-25 キー階層により保護されたシステムを安全保護する方法

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61252730A (ja) * 1985-04-29 1986-11-10 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン 暗号化保護通信用鍵記憶及び配分システム
JPH01188133A (ja) * 1988-01-22 1989-07-27 Nippon Telegr & Teleph Corp <Ntt> 同報通信システム
JPH06259012A (ja) * 1993-03-05 1994-09-16 Hitachi Ltd 階層型鍵管理による暗号方法及び情報通信システム
DE19511298A1 (de) * 1995-03-28 1996-10-02 Deutsche Telekom Ag Verfahren zur Erteilung und zum Entzug der Berechtigung zum Empfang von Rundfunksendungen und Decoder
JPH0991133A (ja) * 1995-09-20 1997-04-04 Fujitsu Ltd 不正申告検出システム

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61252730A (ja) * 1985-04-29 1986-11-10 エヌ・ベ−・フイリツプス・フル−イランペンフアブリケン 暗号化保護通信用鍵記憶及び配分システム
JPH01188133A (ja) * 1988-01-22 1989-07-27 Nippon Telegr & Teleph Corp <Ntt> 同報通信システム
JPH06259012A (ja) * 1993-03-05 1994-09-16 Hitachi Ltd 階層型鍵管理による暗号方法及び情報通信システム
DE19511298A1 (de) * 1995-03-28 1996-10-02 Deutsche Telekom Ag Verfahren zur Erteilung und zum Entzug der Berechtigung zum Empfang von Rundfunksendungen und Decoder
JPH0991133A (ja) * 1995-09-20 1997-04-04 Fujitsu Ltd 不正申告検出システム

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