CN103295605B - The compact disk file system that a kind of supported data is maintained secrecy - Google Patents
The compact disk file system that a kind of supported data is maintained secrecy Download PDFInfo
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- CN103295605B CN103295605B CN201310214559.XA CN201310214559A CN103295605B CN 103295605 B CN103295605 B CN 103295605B CN 201310214559 A CN201310214559 A CN 201310214559A CN 103295605 B CN103295605 B CN 103295605B
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Abstract
The invention discloses the compact disk file system that a kind of supported data is maintained secrecy, described system comprises disc making module, CD read module and compact disk file system subregion; Described disc making module, for making the module in compact disk file system subregion according to different forms; CD read module, for the protection of CD confidential data, carries out user identity discriminating, separates encrypt data and prevents the unauthorized access of confidential data; Compact disk file system subregion, by visible range module, closed security zone module and parameter region module composition.Present invention achieves clear data and encrypt data coexists and same file system, general disc file can be used for and store, can confidential document be stored again, to confidential data real-time guard; Have nothing to do with equipment, compatible all compact disk-read/write; CD read module and confidential data are bound, and therefore CD read module can not be deleted, and can not change, and avoid the digital independent obstacle caused because of reading tool disappearance or destruction.
Description
Technical field
The present invention relates to computing machine and field of information security technology, particularly relate to the compact disk file system that a kind of supported data is maintained secrecy.
Background technology
Compact disk file system is the file system being exclusively used in the mobile memory mediums such as CD, DVD, and ISO9660 is one wherein, is generally used for the data management such as archive, data backup.But the mobility of CD media, while usage of CD-ROM provides convenience, also result in the potential safety hazards such as leakage of data, the data of optical disc storage are easily replicated.
The technical scheme that a kind of data of optical disk is maintained secrecy is the special read-write equipment of CD and special-purpose cd file system.This scheme adopts special compact disk file system and special read-write equipment, and data of optical disk only can be read on special read-write equipment, and general CD, DVD read write line cannot resolve this file system.The defect of this data of optical disk secure fashion is to be furnished with special read-write equipment, too relies on specialized equipment, and adaptability is very narrow, and range of application is limited.
Another kind of technical scheme is computer software enciphering/deciphering optical digital disk.First install on computers and specifically read and write software, rely on this read-write software to read the data of CD.This scheme needs to install specific tool software, general CD, DVD read write line directly cannot read data of optical disk, its defect is that Reading and writing instrument is separated with CD private data, and Reading and writing instrument disappearance (such as viral subversive, by mistake deletion) or version variation will directly cause the phenomenon that cannot read data of optical disk.
Above-mentioned two kinds of common Problems existing of technical scheme are, compact disk file system, all for storing encrypt data, does not have additional space to store clear data.
Summary of the invention
For solving the problems of the technologies described above, the object of this invention is to provide a kind ofly to support expressly, encrypt data the compact disk file system deposited.
Object of the present invention is realized by following technical scheme:
The compact disk file system that supported data is maintained secrecy comprises disc making module, CD read module and compact disk file system subregion; Described
Disc making module, for making the module in compact disk file system subregion according to different forms;
CD read module, for the protection of CD confidential data, carries out user identity discriminating, separates encrypt data and prevents the unauthorized access of confidential data;
Compact disk file system subregion, by visible range module, closed security zone module and parameter region module composition.
Compared with prior art, one or more embodiment of the present invention can have the following advantages by tool:
Do not rely on any equipment, compatible various CD, DVD read write line, without the need to special CD-disc read-write equipment; CD read module and encrypt data are bound, and cannot delete or change CD read module, there is not the digital independent obstacle that ciphertext reads instrument disappearance or changes and cause; Support expressly and encrypt data depositing, clear text file and cryptograph files can be preserved simultaneously.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from instructions, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in instructions, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for instructions, with embodiments of the invention jointly for explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the compact disk file system structural drawing that supported data is maintained secrecy;
Fig. 2 is the compact disk file system concrete structure figure that supported data is maintained secrecy;
Fig. 3 is the format description schematic diagram of visible range module;
Fig. 4 is the format description schematic diagram of parameter region module;
Fig. 5 is CD read module deciphering process flow diagram.
1 be disc making module, 2 be wherein CD read module, the MD5 value, 10 of 3 visible range modules, 4 be closed security zone module, 5 be parameter region module, 6 be compact disk file system start address, 7 be CD capacity mark, 8 to be non-usage space, 9 be password be disc serial number, 11 for compact disk file system Subarea detecting mark, 12 be closed security zone block size.
Embodiment
Easy understand, according to technical scheme of the present invention, do not changing under connotation of the present invention, one of ordinary skill in the art can propose multiple frame mode of the present invention and method for making.Therefore following embodiment and accompanying drawing are only illustrating of technical scheme of the present invention, and should not be considered as of the present invention all or be considered as restriction or the restriction of technical solution of the present invention.
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail.
Fig. 1 is the structural representation of the compact disk file system of maintaining secrecy according to the supported data of the embodiment of the present invention, below with reference to Fig. 1, describes the various piece of the embodiment of the present invention and the function of various piece in detail.
As shown in Figure 1, the structure of compact disk file system that supported data of the present invention is maintained secrecy comprises: disc making module 1, CD read module 2 and compact disk file system subregion; Described disc making module, for making the module in compact disk file system subregion according to different forms; CD read module, for the protection of CD confidential data, carries out user identity discriminating, separates encrypt data and prevents the unauthorized access of confidential data; Compact disk file system subregion, is made up of visible range module 3, closed security zone module 4 and parameter region module 5.
Above-mentioned visible range module, security module and parameter region module form a compact disc image files jointly.Disc making module divides the storage space of CD automatically according to the size of each division module, makes whole compact disk file system image file according to compact disk file system zoned format.
Visible range module, follow ISO9660Level2 standard and a CD capacity mark redefined, this CD capacity mark represents the amount of capacity of visible range module, closed security zone module and parameter region module, is positioned at CD side-play amount 32848 byte place.
Closed security zone module, after following visible range module closely, follows ISO9660Level2 standard in compact disk file system subregion, stores encrypt data.
Parameter region module, follow closed security zone module closely in compact disk file system subregion after, direction memory parameter, illustrative parameter comprises: compact disk file system Subarea detecting marks, the MD5 value of password, closed security zone block size and disc serial number.
CD read module is the key modules of data confidentiality, resides in disc making module at first; During disc making CMOS macro cell compact disk file system image file, CD read module is injected into the visible range module (as shown in Figure 2) of compact disk file system.The confidential data of CD read module and closed security zone module is bundled in same image file, deposits in the lump in company with closed security zone module, without the need to additionally installing reading tool, directly uses CD read module to get final product data decryption; CD read module, once injection, can not be deleted, and cannot change, and there is not the encrypt data caused because of CD read module disappearance or variation and reads obstacle.
The visible module not only stored CD read module of compact disk file system subregion, other clear datas can also be stored, the wright and Production Time etc. of the illustrative remarks of such as CD content, synopsis, CD, need not decipher the data of closed security zone, can get a bird's eye view the summary of secure content.When closed security zone module is less, marginal space can be used for storing other extra clear datas.
The visible range module of compact disk file system subregion adopts ISO9660Level2 standard storage clear data, is therefore applicable to current all CD, DVD read write lines, does not rely on any compact disk reading/writing device.In order to provide the reading capability to closed security zone module and parameter region module, redefine the CD capacity mark 7(of visible range module I SO9660Level2 as shown in Figure 3), wherein 6 is compact disk file system start address.This CD capacity mark represents the amount of capacity of visible range module, closed security zone module and parameter region module, is positioned at CD offset address 32848(0x8050) byte place, occupy-place width is 8 bytes.Compatible current all CD, DVD read write lines of the CD capacity mark redefined.
The parameter region module of compact disk file system subregion is sightless subregion to user, size is fixed as 2048 bytes, the illustrative parameter of stored CD, comprises the MD5 value 9(256 position of password), disc serial number 10(32 position), compact disk file system Subarea detecting mark 11(256 position), block size 12(32 position, closed security zone) (as shown in Figure 4) and non-usage space 8.The implication of each parameter is described as follows:
The MD5 value of password: width is 256, is positioned at parameter region module offset address 1976 byte place, generates MD5 value, differentiate for user identity according to the password that user is arranged.
Disc serial number: width 32, is positioned at parameter region module offset address 2008 byte place, the unique identification symbol of compact disk file system.
Compact disk file system Subarea detecting marks: width is 256, and be positioned at parameter region module offset address 2012 byte place, be the condition code of compact disk file system, CD read module judges the legitimacy of compact disk file system according to this parameter.
Closed security zone block size: width is 32, is positioned at parameter region module offset address 2044 byte place, represents the amount of capacity of closed security zone module.
The flow process of CD read module deciphering closed security zone ciphertext as shown in Figure 5, mainly comprises the following steps:
Read CD capacity mark as shown in Figure 3.
According to the offset address of CD capacity mark positional parameter district module.
Read the illustrative parameter of parameter region module.
Check the condition code of compact disk file system, i.e. the compact disk file system Subarea detecting mark of Fig. 4.
If the condition code of compact disk file system is legal, request input password pwd; Otherwise, stop.
According to the input of user, the MD5 value of generating cipher, i.e. MD5(pwd).
Contrast with the password MD5 value of parameter region, differentiate the legitimacy of user.
Legal, the SHA1 value of generating cipher, i.e. SHA1(pwd); Otherwise, stop.
The offset address of closed security zone, location, closed security zone offset address computing formula is:
Closed security zone offset address=CD capacity size-closed security zone size-parameter region size.
With SHA(pwd) be key, the encrypt data of deciphering closed security zone.
Although the embodiment disclosed by the present invention is as above, the embodiment that described content just adopts for the ease of understanding the present invention, and be not used to limit the present invention.Technician in any the technical field of the invention; under the prerequisite not departing from the spirit and scope disclosed by the present invention; any amendment and change can be done what implement in form and in details; but scope of patent protection of the present invention, the scope that still must define with appending claims is as the criterion.
Claims (6)
1. the compact disk file system that supported data is secret, it is characterized in that, described system comprises disc making module, CD read module and compact disk file system subregion; Described
Disc making module, for making the module in compact disk file system subregion according to different forms;
CD read module, for the protection of CD confidential data, carries out user identity discriminating, separates encrypt data and prevents the unauthorized access of confidential data;
Compact disk file system subregion, by visible range module, closed security zone module and parameter region module composition;
Described CD read module is according to the illustrative parameter in the parameter region module read, and computational security district module at the offset address of compact disk file system, and deciphers the encrypt data of closed security zone;
Described CD read module is according to the illustrative parameter read, and computational security district module specifically comprises at the offset address of compact disk file system:
Check that whether the condition code of compact disk file system is legal;
Legal, request user inputs password; Otherwise, stop;
According to the password of user's input, the MD5 value of generating cipher;
The MD5 value of password generated and the password MD5 value of parameter region are contrasted, differentiates the legitimacy of user;
Legal, according to the password of user's input, the SHA1 value of generating cipher;
According to closed security zone offset address computing formula, the offset address of closed security zone, location;
Be secret key with SHA1, the encrypt data of deciphering closed security zone.
2. the compact disk file system that supported data according to claim 1 is secret, it is characterized in that, described visible range module, closed security zone module and parameter region module form a compact disc image files jointly.
3. the compact disk file system that supported data according to claim 1 is secret, is characterized in that, described in
Visible range module, for storing clear data and described CD read module;
Closed security zone module, for storing encrypt data;
Parameter region module, for direction memory parameter.
4. the compact disk file system that supported data according to claim 3 is secret, is characterized in that, described in
Clear data comprises: the wright of the illustrative remarks of CD content, synopsis, CD and Production Time;
Illustrative parameter comprises: compact disk file system Subarea detecting marks, the MD5 value of password, closed security zone block size and disc serial number.
5. the compact disk file system that supported data according to claim 1 is secret, it is characterized in that, described CD read module is stored in disc making module, and is injected in visible range module by disc making module, is stored with plaintext version by visible range module.
6. the compact disk file system that supported data according to claim 1 is secret, it is characterized in that, described closed security zone offset address computing formula is:
Closed security zone offset address=CD capacity size-closed security zone size-parameter region size.
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| CN201310214559.XA CN103295605B (en) | 2013-05-31 | 2013-05-31 | The compact disk file system that a kind of supported data is maintained secrecy |
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Citations (4)
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|---|---|---|---|---|
| CN101950575A (en) * | 2009-07-09 | 2011-01-19 | Lsi公司 | Prevent the unauthorized use of CD |
| CN102043928A (en) * | 2009-10-13 | 2011-05-04 | 创易科技股份有限公司 | External CD driver with data encryption and decryption functions and encryption and decryption methods utilized by same |
| CN102194497A (en) * | 2010-03-10 | 2011-09-21 | 方可成 | Optical disk ant-transcription method applying hardware |
| CN102982824A (en) * | 2012-12-03 | 2013-03-20 | 滕慧平 | Anti-piracy video storing and playing system and method thereof |
-
2013
- 2013-05-31 CN CN201310214559.XA patent/CN103295605B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101950575A (en) * | 2009-07-09 | 2011-01-19 | Lsi公司 | Prevent the unauthorized use of CD |
| CN102043928A (en) * | 2009-10-13 | 2011-05-04 | 创易科技股份有限公司 | External CD driver with data encryption and decryption functions and encryption and decryption methods utilized by same |
| CN102194497A (en) * | 2010-03-10 | 2011-09-21 | 方可成 | Optical disk ant-transcription method applying hardware |
| CN102982824A (en) * | 2012-12-03 | 2013-03-20 | 滕慧平 | Anti-piracy video storing and playing system and method thereof |
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Address after: Seven, B2 building, building 162, creative road, 510663 science Avenue, Luogang District Science City, Guangdong, Guangzhou Patentee after: Guangdong Grand View Polytron Technologies Inc Address before: Seven, B2 building, building 162, creative road, 510663 science Avenue, Luogang District Science City, Guangdong, Guangzhou Patentee before: Guangdong Gloryview Technology Co., Ltd. |
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Denomination of invention: Light disk file system supportive of data privacy Effective date of registration: 20191128 Granted publication date: 20160120 Pledgee: Industrial Bank Co., Ltd. Guangzhou Development Zone sub branch Pledgor: ARESON Inc. Registration number: Y2019440000237 |
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Denomination of invention: A CD-ROM file system supporting data confidentiality Effective date of registration: 20200923 Granted publication date: 20160120 Pledgee: Industrial Bank Co.,Ltd. Guangzhou Development Zone sub branch Pledgor: Hongjing Technology Co.,Ltd. Registration number: Y2020990001159 |
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