CA2567573C - Adjustable free-running secure clock - Google Patents

Adjustable free-running secure clock Download PDF

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Publication number
CA2567573C
CA2567573C CA2567573A CA2567573A CA2567573C CA 2567573 C CA2567573 C CA 2567573C CA 2567573 A CA2567573 A CA 2567573A CA 2567573 A CA2567573 A CA 2567573A CA 2567573 C CA2567573 C CA 2567573C
Authority
CA
Canada
Prior art keywords
clock
time
adjustment
drift
limit
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 - Fee Related
Application number
CA2567573A
Other languages
English (en)
French (fr)
Other versions
CA2567573A1 (en
Inventor
Trevor Davies
John David Couling
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.)
Dolby Laboratories Licensing Corp
Original Assignee
Dolby Laboratories Licensing Corp
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 Dolby Laboratories Licensing Corp filed Critical Dolby Laboratories Licensing Corp
Publication of CA2567573A1 publication Critical patent/CA2567573A1/en
Application granted granted Critical
Publication of CA2567573C publication Critical patent/CA2567573C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/71—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
    • G06F21/72—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information in cryptographic circuits
    • G06F21/725—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information in cryptographic circuits operating on a secure reference time value
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/3297—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving time stamps, e.g. generation of time stamps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
    • H04L2209/60—Digital content management, e.g. content distribution
    • H04L2209/603—Digital right managament [DRM]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Technology Law (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mathematical Physics (AREA)
  • Electric Clocks (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Oscillators With Electromechanical Resonators (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
CA2567573A 2004-06-15 2005-05-19 Adjustable free-running secure clock Expired - Fee Related CA2567573C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/869,460 US7266714B2 (en) 2004-06-15 2004-06-15 Method an apparatus for adjusting the time of a clock if it is determined that the degree of adjustment is within a limit based on the clocks initial time
US10/869,460 2004-06-15
PCT/US2005/017797 WO2006001957A1 (en) 2004-06-15 2005-05-19 Adjustable free-running secure clock

Publications (2)

Publication Number Publication Date
CA2567573A1 CA2567573A1 (en) 2006-01-05
CA2567573C true CA2567573C (en) 2014-11-18

Family

ID=34971857

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2567573A Expired - Fee Related CA2567573C (en) 2004-06-15 2005-05-19 Adjustable free-running secure clock

Country Status (8)

Country Link
US (1) US7266714B2 (enExample)
EP (1) EP1762036B1 (enExample)
JP (1) JP2008502904A (enExample)
CN (2) CN102170353B (enExample)
AT (1) ATE496447T1 (enExample)
CA (1) CA2567573C (enExample)
DE (1) DE602005026006D1 (enExample)
WO (1) WO2006001957A1 (enExample)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7370212B2 (en) 2003-02-25 2008-05-06 Microsoft Corporation Issuing a publisher use license off-line in a digital rights management (DRM) system
JP4481141B2 (ja) * 2004-10-13 2010-06-16 株式会社日立製作所 ストレージシステム及び計算機システム
US8347078B2 (en) 2004-10-18 2013-01-01 Microsoft Corporation Device certificate individualization
US8336085B2 (en) 2004-11-15 2012-12-18 Microsoft Corporation Tuning product policy using observed evidence of customer behavior
KR100619981B1 (ko) * 2005-01-08 2006-09-11 엘지전자 주식회사 이동 통신 단말기의 ｄｒｍ 기능 개선 방법
US8438645B2 (en) * 2005-04-27 2013-05-07 Microsoft Corporation Secure clock with grace periods
US8725646B2 (en) 2005-04-15 2014-05-13 Microsoft Corporation Output protection levels
US9436804B2 (en) 2005-04-22 2016-09-06 Microsoft Technology Licensing, Llc Establishing a unique session key using a hardware functionality scan
US9363481B2 (en) 2005-04-22 2016-06-07 Microsoft Technology Licensing, Llc Protected media pipeline
US20060265758A1 (en) 2005-05-20 2006-11-23 Microsoft Corporation Extensible media rights
US7716513B2 (en) * 2005-08-12 2010-05-11 Graphics Properties Holdings, Inc. Self-tuning time interpolator
CN1967490A (zh) * 2005-11-15 2007-05-23 鸿富锦精密工业（深圳）有限公司 电脑时间自动恢复系统及方法
US7861308B2 (en) * 2005-11-28 2010-12-28 Sony Corporation Digital rights management using trusted time
US7395448B2 (en) * 2006-07-26 2008-07-01 International Business Machines Corporation Directly obtaining by application programs information usable in determining clock accuracy
JP5326255B2 (ja) * 2007-10-15 2013-10-30 日本電気株式会社 時刻監視装置、電子機器、および、時刻監視方法
EP2056227B1 (en) 2007-10-31 2016-02-24 EchoStar Technologies L.L.C. System and method for employing a controlled-modification current time value
US8819838B2 (en) * 2008-01-25 2014-08-26 Google Technology Holdings LLC Piracy prevention in digital rights management systems
CN102326126B (zh) * 2009-02-18 2013-05-01 杜比实验室特许公司 用于将多个安全时钟同步的方法和系统
US10110368B2 (en) * 2014-12-08 2018-10-23 Diebold Nixdorf, Incorporated Clock synchronization

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4602375A (en) * 1982-06-11 1986-07-22 Communications Satellite Corporation Onboard clock correction by means of drift prediction
US5444780A (en) 1993-07-22 1995-08-22 International Business Machines Corporation Client/server based secure timekeeping system
US5826066A (en) * 1996-08-08 1998-10-20 Tandem Computers Incorporated Method for keeping accurate time in a computer system
US5999921A (en) 1997-04-30 1999-12-07 Pitney Bowes Inc. Electronic postage meter system having plural clock system providing enhanced security
US6708281B1 (en) 2000-07-10 2004-03-16 Advanced Micro Devices, Inc. Methods for providing estimates of the current time in a computer system including a local time source having one of several possible levels of trust with regard to timekeeping
KR20030014224A (ko) 2000-10-11 2003-02-15 트러스트카피 프라이빗 리미티드 안전한 및 인증된 문서의 원격 인쇄
JP2002215175A (ja) * 2001-01-15 2002-07-31 Sony Corp 情報処理装置
JP2002229860A (ja) * 2001-01-30 2002-08-16 Sanyo Electric Co Ltd コンテンツ再生装置
US20020104004A1 (en) 2001-02-01 2002-08-01 Bruno Couillard Method and apparatus for synchronizing real-time clocks of time stamping cryptographic modules
US7146504B2 (en) 2002-06-13 2006-12-05 Microsoft Corporation Secure clock on computing device such as may be required in connection with a trust-based system
US20040083487A1 (en) 2002-07-09 2004-04-29 Kaleidescape, A Corporation Content and key distribution system for digital content representing media streams
EP1460509B1 (en) * 2003-03-20 2009-12-23 Sony Ericsson Mobile Communications AB Mobile equipment with time control for DRM schemes
US7590807B2 (en) * 2003-11-03 2009-09-15 Netapp, Inc. System and method for record retention date in a write once read many storage system
US7116969B2 (en) * 2004-02-12 2006-10-03 Sharp Laboratories Of America, Inc. Wireless device having a secure clock authentication method and apparatus
US7065679B2 (en) * 2004-03-24 2006-06-20 Hitachi, Ltd. Reasonable clock adjustment for storage system

Also Published As

Publication number Publication date
CN1965526A (zh) 2007-05-16
CA2567573A1 (en) 2006-01-05
CN102170353A (zh) 2011-08-31
US7266714B2 (en) 2007-09-04
ATE496447T1 (de) 2011-02-15
EP1762036A1 (en) 2007-03-14
JP2008502904A (ja) 2008-01-31
EP1762036B1 (en) 2011-01-19
DE602005026006D1 (de) 2011-03-03
WO2006001957A1 (en) 2006-01-05
US20050276167A1 (en) 2005-12-15
CN1965526B (zh) 2011-06-29
CN102170353B (zh) 2012-07-04

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Effective date: 20180522