CN1192286A - Module security device - Google Patents
Module security device Download PDFInfo
- Publication number
- CN1192286A CN1192286A CN96195969A CN96195969A CN1192286A CN 1192286 A CN1192286 A CN 1192286A CN 96195969 A CN96195969 A CN 96195969A CN 96195969 A CN96195969 A CN 96195969A CN 1192286 A CN1192286 A CN 1192286A
- Authority
- CN
- China
- Prior art keywords
- module
- memory module
- memory
- simm
- code
- 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.)
- Pending
Links
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
- G06F21/88—Detecting or preventing theft or loss
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11C—STATIC STORES
- G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
- G11C11/21—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements
- G11C11/34—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using electric elements using semiconductor devices
-
- 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
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
- G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
Abstract
A memory module containing a plurality of memory circuits, a non-volatile memory which stores a predetermined code, counting means to count up (down) to (from) a predetermined value on power-up of the module, control means to disable the module if the predetermined code is not received by the module before the predetermined count is reached.
Description
The present invention relates to memory module, relate more specifically in many ordinary individual's computing machines, to be used for expand the signle in-line memory module (SIMM) of the dynamic storage of computing machine.
The incident of stealing signle in-line memory module (SIMM) from computing machine is in obvious increase.Owing to following reason SIMM becomes attractive theft article:
They are small and light, this means to transport to have no difficulty;
Easily they are taken off from computer system;
They are interchangeable and to user's highly transparent, therefore do not have big compatibility issue;
They are valuable, 75 dollars of every SIMM prices;
In worldwide, exist great demand to SIMM;
Their difficulties in operation are given discovery, thereby are difficult to follow the trail of stolen SIMM;
Modern software needs a large amount of storeies to move, and therefore more and more needs them;
SIMM extremely difficult antitheft (physically);
Many modern offices have a large amount of computing machines, respectively comprise some SIMM, this means the high concentration zones with SIMM.
Reaching immediately owing to these size of devices are little, interchangeability is difficult to prevent stolen.Can unload SIMM and be kept at the proof box from each computing machine every night, but since dismounting every day with heavily to insert these devices pretty troublesome and do not accomplish this point in large-scale office.
Traditional SIMM comprises some memory circuits on a little printed circuit board (PCB) (pcb), be generally DRAM (dynamic RAM) circuit.When starting computing machine, whether the processor in this computing machine checks each SIMM all in the suitable inserting groove of computing machine.Usually SIMM does not comprise any memory management logical OR controller, because they are unnecessary.Therefore, except as if discerning it putting on each SIMM certain physics (visible or sightless) mark or the label.Adopt label to have some shortcomings for security purpose.Steal owing to seeing that mark or label could be discerned and detect SIMM, so can not stop the use of stolen SIMM.Its SIMM of careless user that can not notify SIMM steals.Preferably have and make any calculating function detect its specific SIMM that connects someway to be actually to steal, to forbid the operation of this SIMM then.
The invention provides a kind of memory module, it comprises some memory circuits, stores the nonvolatile memory of a code, tackles the control device to the access of module when computer starting, makes must import correct code when the initialization of this memory module of starting.
The present invention is best suited for the memory module of utilizing the part memory circuit, because they have had the controller that the access to the unit of fault is redirected on module.If walk around this controller, just module can not be worked.If the present invention is used on the standard storage module then can walks around additional control device, because do not need the control device that adds for the normal running of module.Thereby on normal memory module, can easily avoid complete measure.
The invention provides a kind of memory module, if just comprise a plurality of memory circuits, store the nonvolatile memory of predetermined code, when module powers up, upwards count down to predetermined value or from a predetermined value downwards counting counting assembly and forbid the control device of this module when module is not received predetermined code before arriving predetermined counting.
By way of example the present invention is better understood with reference to the accompanying drawings and show how it realizes, in the accompanying drawing:
Fig. 1 illustrates the two sides of memory module (being SIMM in this example).
Referring to accompanying drawing, Figure 1A illustrates the front of the module 1 of the intensive DRAM of having circuit 2, and Figure 1B illustrates the module back side that comprises control circuit 3 and nonvolatile memory 4.
Control circuit and nonvolatile memory be the reverse side of memory circuit on SIMM not necessarily, and control circuit and nonvolatile memory can perhaps can make things convenient for the mode arrangement system with any other on memory circuit on module one side together.
Adopt code to forbid that the operation of SIMM is not footy.This is because exist the problem of the principal computer of interrupt control SIMM in initialization cycle.When powering up, must allow principal computer to carry out function of initializing.Yet, in case initialization storer just be not easy to forbid it.The present invention adopts the counter that increases progressively (or successively decreasing) when module powers up to overcome this problem.If module is not received certain code or code sequence before counter arrives its predetermined value, just the control gear on the module by forbidding this module such as the forbidden data impact damper, thereby cause makeing mistakes in the computing machine.
The counter count enable clock period of being adopted, refresh cycle number, read or write cycle or some other operand, for example column address strobe (CAS) enters the number of times of active (or inactive).
Code or code sequence are in the nonvolatile memory that is stored on the module.On the user side of computing machine, by BIOS (basic input/output) or from software input code or code sequence, for example from the initialization files of computing machine.Even can make manual input code of user or code sequence.Can be with the mode input code or the code sequence that are similar to password, even code chain can be connected on the keystroke speed, on " time coiling " interval between the character of user password.
Nonvolatile memory and control gear can be in same devices (using specific integrated circuit ASIC) in certain embodiments.
Can forbid the output of this memory circuit by the output enable of forbidding these memory circuits or memory device.
The invention has the advantages that control gear require security code to start or forbid this module before its waits for initializes memory module.
Though can adopt one of initialization files (such as the autoexec.bat file in the personal computer) to come input code, this has the reproducible file and is examined shortcoming with retrieval coding, and manual input code when being preferably in each vectoring computer.
As a kind of replacement scheme of avoiding this problem for this code being added fast among the guiding EPROM or using a password coding this document, for example, when the load memory module, configuration or installation procedure prompting user enter password, and install software is encoded it with starting the required key of memory-safe device.Then a program is added in config.sys, autoexec.bat or other initialization batch program and enters password, come on decruption key file and the controller with it then its write store module with the prompting user.Can not provide correct password will cause computing machine overtime and the storer of computing machine can not be operated.
Be appreciated that within the scope of the invention and can make various corrections the foregoing description.
Claims (8)
1. memory module that comprises a plurality of memory circuits and be used for the nonvolatile memory of storing predetermined code, if just it is characterized in that it be included in the counting assembly that count down to a predetermined value when this module powers up and before arriving this preset count this module do not receive the control device that this predetermined code is forbidden this module.
2. according to the memory module of claim 1, it is characterized in that this counter device counting read or write cycle number.
3. according to the memory module of claim 1, it is characterized in that this counter device counting clock periodicity.
4. according to the memory module of the claim of any one front, it is characterized in that this predetermined code is a code sequence.
5. according to the memory module of the claim of any one front, it is characterized in that this predetermined code is manually input.
6. according to the memory module of the claim of any one front, it is characterized in that this control device forbids inactive this module of forbidding by setting this output.
7. according to the memory module of the claim of any one front, it is characterized in that this memory module is a signle in-line memory module.
8. computer system that comprises according to the memory module of any one in the claim of front.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB9515879A GB2290894A (en) | 1995-08-02 | 1995-08-02 | Memory module security |
| GB9515879.6 | 1995-08-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1192286A true CN1192286A (en) | 1998-09-02 |
Family
ID=10778671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96195969A Pending CN1192286A (en) | 1995-08-02 | 1996-07-31 | Module security device |
Country Status (7)
| Country | Link |
|---|---|
| EP (1) | EP0842512A1 (en) |
| JP (1) | JPH11510280A (en) |
| KR (1) | KR19990036065A (en) |
| CN (1) | CN1192286A (en) |
| GB (1) | GB2290894A (en) |
| TW (1) | TW293106B (en) |
| WO (1) | WO1997005618A1 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5996096A (en) * | 1996-11-15 | 1999-11-30 | International Business Machines Corporation | Dynamic redundancy for random access memory assemblies |
| US6321335B1 (en) | 1998-10-30 | 2001-11-20 | Acqis Technology, Inc. | Password protected modular computer method and device |
| US6718415B1 (en) | 1999-05-14 | 2004-04-06 | Acqis Technology, Inc. | Computer system and method including console housing multiple computer modules having independent processing units, mass storage devices, and graphics controllers |
| US6643777B1 (en) | 1999-05-14 | 2003-11-04 | Acquis Technology, Inc. | Data security method and device for computer modules |
| US7990724B2 (en) | 2006-12-19 | 2011-08-02 | Juhasz Paul R | Mobile motherboard |
| TWI440424B (en) | 2008-10-17 | 2014-06-01 | Sunonwealth Electr Mach Ind Co | Thin dissipating fan |
| EP2295815A1 (en) | 2009-08-13 | 2011-03-16 | Sunonwealth Electric Machine Industry Co., Ltd. | Miniature fan |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5056140A (en) * | 1990-02-22 | 1991-10-08 | Blanton Kimbell | Communication security accessing system and process |
| JPH04173444A (en) * | 1990-11-06 | 1992-06-22 | Fujitsu Ten Ltd | Security device for on-vehicle tuner |
| JPH05204766A (en) * | 1992-01-24 | 1993-08-13 | Fujitsu Ltd | Identity confirming device |
-
1995
- 1995-08-02 GB GB9515879A patent/GB2290894A/en not_active Withdrawn
- 1995-12-28 TW TW084114019A patent/TW293106B/en active
-
1996
- 1996-07-31 WO PCT/GB1996/001874 patent/WO1997005618A1/en not_active Application Discontinuation
- 1996-07-31 EP EP96925917A patent/EP0842512A1/en not_active Withdrawn
- 1996-07-31 JP JP9507381A patent/JPH11510280A/en active Pending
- 1996-07-31 KR KR1019980700730A patent/KR19990036065A/en not_active Application Discontinuation
- 1996-07-31 CN CN96195969A patent/CN1192286A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| TW293106B (en) | 1996-12-11 |
| GB9515879D0 (en) | 1995-10-04 |
| KR19990036065A (en) | 1999-05-25 |
| GB2290894A (en) | 1996-01-10 |
| JPH11510280A (en) | 1999-09-07 |
| WO1997005618A1 (en) | 1997-02-13 |
| EP0842512A1 (en) | 1998-05-20 |
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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 | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |