CN101965255B - 实时时钟 - Google Patents
实时时钟 Download PDFInfo
- Publication number
- CN101965255B CN101965255B CN200980107158.6A CN200980107158A CN101965255B CN 101965255 B CN101965255 B CN 101965255B CN 200980107158 A CN200980107158 A CN 200980107158A CN 101965255 B CN101965255 B CN 101965255B
- Authority
- CN
- China
- Prior art keywords
- real
- time clock
- counter
- write operation
- clock device
- 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.)
- Active
Links
- 238000012360 testing method Methods 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 42
- 238000013475 authorization Methods 0.000 claims 6
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 claims 3
- 230000003213 activating effect Effects 0.000 claims 1
- 238000004891 communication Methods 0.000 claims 1
- 230000008569 process Effects 0.000 description 23
- 230000004048 modification Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 239000000872 buffer Substances 0.000 description 5
- 230000004044 response Effects 0.000 description 3
- 230000002123 temporal effect Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000014509 gene expression Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 210000001260 vocal cord Anatomy 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR 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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/04—Generating or distributing clock signals or signals derived directly therefrom
- G06F1/14—Time supervision arrangements, e.g. real time clock
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- Storage Device Security (AREA)
- Electric Clocks (AREA)
Abstract
Description
Claims (31)
Applications Claiming Priority (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GBGB0802741.9A GB0802741D0 (en) | 2008-02-14 | 2008-02-14 | Secure Clock |
GB0802741.9 | 2008-02-14 | ||
GB0805316.7 | 2008-03-20 | ||
GB0805316A GB2457513B (en) | 2008-02-14 | 2008-03-20 | Real time clock |
PCT/GB2009/050142 WO2009101445A1 (en) | 2008-02-14 | 2009-02-13 | Real time clock |
Publications (2)
Publication Number | Publication Date |
---|---|
CN101965255A CN101965255A (zh) | 2011-02-02 |
CN101965255B true CN101965255B (zh) | 2013-08-28 |
Family
ID=39271718
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN200980107158.6A Active CN101965255B (zh) | 2008-02-14 | 2009-02-13 | 实时时钟 |
Country Status (4)
Country | Link |
---|---|
US (1) | US7702943B2 (zh) |
CN (1) | CN101965255B (zh) |
GB (2) | GB0802741D0 (zh) |
WO (1) | WO2009101445A1 (zh) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8370923B2 (en) * | 2008-07-29 | 2013-02-05 | Ncr Corporation | Access to a processing device |
KR20100067447A (ko) * | 2008-12-11 | 2010-06-21 | 한국전자통신연구원 | 광대역 음성 코덱을 적용한 유무선 통합 통신 장치 |
US8886957B2 (en) * | 2009-11-09 | 2014-11-11 | 3Dlabs Inc. Ltd. | Systems, methods, software, and components using tamper-proof real-time clock |
CN104573509B (zh) * | 2013-10-21 | 2019-10-29 | 研祥智能科技股份有限公司 | 系统时间防护方法和装置 |
US10509435B2 (en) * | 2016-09-29 | 2019-12-17 | Intel Corporation | Protected real time clock with hardware interconnects |
CN112632642B (zh) * | 2020-12-28 | 2022-05-20 | 北京深思数盾科技股份有限公司 | 一种时钟校验方法、装置及电子设备 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0965902A2 (en) * | 1994-06-28 | 1999-12-22 | National Semiconductor Corporation | Secure data processor with cryptography and tamper detection |
CN1707464A (zh) * | 2005-03-17 | 2005-12-14 | 联想(北京)有限公司 | 内嵌实时时钟的安全芯片以及校准其实时时钟方法 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6772361B1 (en) * | 2000-07-10 | 2004-08-03 | Advanced Micro Devices, Inc. | Real time clock (RTC) having several highly desirable timekeeping dependability and security attributes, and methods for accessing a register thereof |
JP2002304233A (ja) * | 2001-04-04 | 2002-10-18 | Mitsubishi Electric Corp | タイマ回路 |
US7421579B2 (en) | 2002-06-28 | 2008-09-02 | Microsoft Corporation | Multiplexing a secure counter to implement second level secure counters |
US7076802B2 (en) * | 2002-12-31 | 2006-07-11 | Intel Corporation | Trusted system clock |
JP2006201856A (ja) * | 2005-01-18 | 2006-08-03 | Renesas Technology Corp | 半導体集積回路 |
JP2006222515A (ja) * | 2005-02-08 | 2006-08-24 | Hitachi Ulsi Systems Co Ltd | 半導体集積回路 |
US7962752B2 (en) | 2005-09-23 | 2011-06-14 | Intel Corporation | Method for providing trusted time in a computing platform |
US8220031B2 (en) * | 2007-05-01 | 2012-07-10 | Texas Instruments Incorporated | Secure time/date virtualization |
-
2008
- 2008-02-14 GB GBGB0802741.9A patent/GB0802741D0/en not_active Ceased
- 2008-03-20 GB GB0805316A patent/GB2457513B/en active Active
- 2008-05-08 US US12/117,421 patent/US7702943B2/en active Active
-
2009
- 2009-02-13 WO PCT/GB2009/050142 patent/WO2009101445A1/en active Application Filing
- 2009-02-13 CN CN200980107158.6A patent/CN101965255B/zh active Active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0965902A2 (en) * | 1994-06-28 | 1999-12-22 | National Semiconductor Corporation | Secure data processor with cryptography and tamper detection |
CN1707464A (zh) * | 2005-03-17 | 2005-12-14 | 联想(北京)有限公司 | 内嵌实时时钟的安全芯片以及校准其实时时钟方法 |
Also Published As
Publication number | Publication date |
---|---|
US20090238323A1 (en) | 2009-09-24 |
GB0805316D0 (en) | 2008-04-30 |
CN101965255A (zh) | 2011-02-02 |
GB0802741D0 (en) | 2008-03-26 |
WO2009101445A9 (en) | 2010-05-27 |
GB2457513B (en) | 2010-10-20 |
US7702943B2 (en) | 2010-04-20 |
GB2457513A (en) | 2009-08-19 |
WO2009101445A1 (en) | 2009-08-20 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C06 | Publication | ||
PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
C41 | Transfer of patent application or patent right or utility model | ||
C56 | Change in the name or address of the patentee | ||
CP01 | Change in the name or title of a patent holder |
Address after: Edinburgh Patentee after: Hongkong Semiconductor Co.,Ltd. Address before: Edinburgh Patentee before: Wolfson Microelectronics PLC Address after: Edinburgh Patentee after: Wolfson Microelectronics PLC Address before: Edinburgh Patentee before: WOLFSON MICROELECTRONICS PLC |
|
TR01 | Transfer of patent right |
Effective date of registration: 20150922 Address after: Edinburgh Patentee after: CIRRUS LOGIC INTERNATIONAL SEMICONDUCTOR Ltd. Address before: Edinburgh Patentee before: Hongkong Semiconductor Co.,Ltd. |