CN103984910A - System partitioning hiding method - Google Patents
System partitioning hiding method Download PDFInfo
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- CN103984910A CN103984910A CN201410204526.1A CN201410204526A CN103984910A CN 103984910 A CN103984910 A CN 103984910A CN 201410204526 A CN201410204526 A CN 201410204526A CN 103984910 A CN103984910 A CN 103984910A
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- 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
- G06F21/80—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 storage media based on magnetic or optical technology, e.g. disks with sectors
- G06F21/805—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 storage media based on magnetic or optical technology, e.g. disks with sectors using a security table for the storage sub-system
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Abstract
The invention discloses a system partition hiding method. A file system type identification of each encryption system partition on a hard disk is set into a hidden value; under the system operation state, the reading operation is carried out on a partition table of the hard disk, and the file system type identification of the corresponding encryption system partition in an internal storage buffering region is changed into a normal value and then is read; when the writing operation is carried out on the partition table of the hard disk, a section of internal storage space is applied for, data to be written is copied to the applied internal storage buffering region, the file system type identification of the corresponding encryption system partitioning in the internal storage buffering region is changed into a hidden value and then is written on the hard disk. According to the method, the incorrect formatting operation is effectively avoided, a drive does not need to be distributed for the encryption partition by a system, and the hidden property of the encryption partition is enhanced.
Description
Technical field
The present invention relates to HD encryption technology, particularly relate to a kind of the Method of Hiding System Partition.
Background technology
The data security of portable hard drive has great significance for user, for data are protected, can adopt the method for software cryptography to be encrypted the subregion on portable hard drive.At present, the degree of ripeness of the HD encryption software of increasing income both domestic and external is higher, utilizes virtual disk technology, can utilize virtual disk driver to load into fdisk the data of selection area, and encryption and decryption module is built in virtual disk driver, realize the transparent encryption and decryption of user oriented layer.Some existing HD encryption softwares have system partitioning encryption function, can write the start-up routine carrying in the reserve sector region of hard disk, the start-up loading process of adapter system.But; existing HD encryption software is in the time being encrypted the system partitioning of portable hard drive; encrypted partition is not implemented to hide the function of protection; in the time that portable hard drive inserts the main frame of operation system; the data of encrypted partition cannot be identified by file system; thereby eject the requirement of format subregion, once user's executable operations will damage enciphered data.
Summary of the invention
Fundamental purpose of the present invention is to overcome the deficiencies in the prior art, and a kind of the Method of Hiding System Partition is provided.
For achieving the above object, the present invention is by the following technical solutions:
A kind of the Method of Hiding System Partition, comprises the following steps:
A. in internal memory, the file system type mark of system partitioning to be encrypted is changed into and hides value, then write in the reserve sector of hard disk, and after encrypting, make the file system type of encryption system subregion on hard disk be designated hiding value;
B. in the time that start-up routine is read Master boot sector, if relate to partition table content, in internal memory, rewrite partition table, read after changeing back normal value by the file type mark of respective encrypted system partitioning;
C. before subregion guidance code is written into, read-write Master boot sector, temporarily changes back normal value by the file type mark of respective encrypted system partitioning on hard disk;
D. in the encryption and decryption main thread initializes stage, read-write Master boot sector, changes back the file type mark of respective encrypted system partitioning on hard disk to hide value;
E. under system running state, during to hard disk partition table read operation, read again change the file system type mark of respective encrypted system partitioning into normal value in core buffer after; During to hard disk partition table write operation, apply for one section of memory headroom, data Replica to be written, in the core buffer of application, and is changed into the file system type mark of respective encrypted system partitioning in core buffer hide value, then write on hard disk.
Further:
Hide value for 17h or 12h.
In step a-e, comprise separately: judge whether to encryption system subregion and boot partition be same subregion, if be judged as same subregion, only the file system type mark of encryption system subregion changed into accordingly and hides value or change normal value operation into; If be judged as different subregions, the file system type mark of encryption system subregion and boot partition changed into accordingly and hides value or change normal value operation into simultaneously.
Judge according to the size in the first main partition in partition table whether encryption system subregion and boot partition are same subregion: if the size in the first main partition is less than threshold value, to think that encryption system subregion separates with boot partition, otherwise will think that encryption system subregion and boot partition are same subregions.
Described hard disk is portable hard drive.
Beneficial effect of the present invention:
The present invention, by portable hard drive partition table is operated, makes the file system type mark of encrypted partition to hide mark into, has effectively avoided the operation of mistake format, and system also can not distributed drive for encrypted partition, has strengthened the disguise of encrypted partition.Meanwhile, the mode of utilizing internal memory to filter, makes virtual disk driver correct in the time reading partition table of encryption software, the file system type of encrypted partition is identified to the value that becomes script in internal memory.Thereby when portable hard drive is during as guiding device, the operating system of encrypted partition can start and move from hidden partition.Subzone hiding method of the present invention is practical, effective range is wide, manually carry out extra operation without user, disguise and security that Mobile hard disk system divides zone encryption are improved, overcome the deficiency of the existing encryption software based on virtual disk driver, be suitable for but be not limited to MBR type partition table and 32-bit Windows xp, Windows Vista, Windows7, Windows8 operating system.
Brief description of the drawings
Fig. 1 is the flow process intention of the Method of Hiding System Partition embodiment of the present invention;
Fig. 2 is the particular flow sheet of step a in the embodiment of the present invention;
Fig. 3 is the particular flow sheet of step b in the embodiment of the present invention;
Fig. 4 is the particular flow sheet of step c in the embodiment of the present invention;
Fig. 5 is the particular flow sheet of steps d in the embodiment of the present invention;
Fig. 6 is the particular flow sheet of step e in the embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated.Should be emphasized that, following explanation is only exemplary, instead of in order to limit the scope of the invention and to apply.
As shown in Figure 1, the basic step of the embodiment of the present invention is as follows.First, encrypt initial phase in encryption software executive system, increase operation to partition table when Main Boot Record, the file system type of system partitioning to be encrypted mark is changed into the value of hiding type, and (step a).Then, by read/write function under encryption software real pattern, in the time that function call int13 break in service function carries out the read operation of sector, as relate to partition table content, in destination buffer, partition table is modified immediately, (step b) to change the file system type mark of encryption system subregion into normal value.Then, before subregion guidance code is written into, utilize the read/write function under encryption software real pattern, (step c) to change the type identification of encrypted partition on hard disk into normal value.Next, the encryption and decryption main thread initializes stage under Windows environment, utilize the read/write function of encryption software virtual disk driver, the file system type mark of encrypted partition on hard disk is changed into and hides value (steps d).By read/write function in virtual disk driver, in the time that read operation relates to partition table content, in destination buffer, partition table is modified immediately, will hide value and change back normal value; In the time that write operation relates to partition table content, first distribute the memory headroom identical with writing length, data to be written are copied to newly assigned memory headroom from source address, and the file system type of revising encrypted partition in newly assigned memory headroom identifies, it is changed into and hidden value by normal value, then write that on hard disc apparatus, (step e).
In step a-e, can comprise whether to system partitioning and boot partition be the decision operation of same subregion, wherein, if be judged as same subregion, only the file system type mark of encryption system subregion be operated; If be judged as different subregions, will the file system type of system partitioning and boot partition be identified and be operated simultaneously.Further, can judge whether system partitioning and boot partition are same subregion according to the size in other the first main partition of subregion: if the size in the first main partition is less than threshold value, to think that system partitioning separates with boot partition, otherwise will think that system partitioning and boot partition are same subregions.In the time that system partitioning and boot partition are same subregion, operation only relates to the file system type mark of corresponding its subregion in partition table; In the time that system partitioning separates with boot partition, operation relates to the file system type mark of two subregions corresponding in partition table.
Of the present invention mainly based on following principle: the starting stage of dividing zone encryption in encryption software executive system, can in internal memory, generate reserve sector data, and write in the initial reserve sector of hard disk, the content that has comprised partition table in these reserve sector data, before data write hard disk reserve sector, at this moment the step a carrying into execution a plan adds the statement of revising memory value in code, and the partitioned file system type mark to be encrypted in internal memory is changed into and hides value.Encryption software will be taken over loading and the operation of operating system on portable hard drive after this, after encrypting, the work of main bootstrap program is completed by the start-up routine of encryption software, the service function of No. 13 interruption (int13) read-write sector function under real pattern is revised as the read/write function carrying by encryption software simultaneously, at this moment the step b carrying into execution a plan, under real pattern read function in add the operation to partition table, make the encrypted partition file system type of reading be designated normal value.In the final stage of main guidance code function; before loading subregion guidance code; the step c carrying into execution a plan, changes back normal value by the encrypted partition file system type mark on hard disk partition table, to complete transitional smooth loading between real pattern and protected mode.When system partitioning being encrypted due to encryption software, the virtual disk driver of its generation can be registered as to system service, in the time that Windows enters kernel initial phase, can load virtual disk driver, and drive thus the transparent encryption and decryption work under Windows.Thereby the step e that the read/write function of virtual disk driver is carried into execution a plan, to realize the filtration to partition table under Windows.In addition, encryption software can create main thread to be responsible for encrypting relevant work for the treatment of, the steps d carrying into execution a plan in main thread function, to guarantee that read/write function carried out read-write operation to partition table, makes in hard disk partition table encrypted partition file system type be designated and hides value.
According to embodiment, partition table is changed, change the file system type mark of encrypted partition on hard disk into hiding type, the value of hiding type is 17h or 12h, ejects format prompting and distributes drive when avoiding portable hard drive to insert operating main frame.In the function that reads and writes data of encryption software, add the rewriting statement for partition table simultaneously, in the time reading the content of partition table from hard disk, change normal value (normal value is 07h) in Zhong Jiang encrypted partition, core buffer file system type mark, then give down-stream; In the time writing on hard disk partition table, will the application identical core buffer of length, the content that will write first copies in buffer zone, file system type mark in Zhong Jiang encrypted partition, buffer zone is changed into and hides value, then write on hard disk.
In specific implementation process, can insert judgement code, judge according to the size in partition table the first main partition whether system partitioning separates with boot partition.Can be at encryption software in the code of reserve sector write-enable instrument, the file system type that inserts amendment subregion to be encrypted is designated the code of hiding value.Can be under encryption software real pattern in the function code of reading writing harddisk sector, insert judgement and amendment code for partition table, in the time that partition table content is read in judgement, change the file system type mark of encryption system subregion in target internal memory into normal value.Can be in the read/write function of encryption software virtual disk driver, insert judgement and amendment code for partition table, in the time that partition table content is read in judgement, change the file system type mark of encryption system subregion in target internal memory into normal value; In the time that judgement will be write partition table content, apply for one section with write length memory headroom of a size, by data Replica to be written to application memory headroom in, and in this memory headroom, the file system type mark of encryption system subregion is changed into and hides value, then this section of amended data are write on hard disk.Can in the run function of encryption software, insert hard disk partition table and rewrite code; before partition boot record obtains control; by amended real pattern read/write function by Master boot sector read-write one time; effect is: change back normal value by the file system type mark of encrypted partition in hard disk partition table, with the transition between completing smoothly from real pattern to protected mode.Can in the encryption and decryption main thread of encryption software, insert hard disk partition table and rewrite code, effect is: at Windows kernel initial phase, utilize amended virtual disk driver read/write function by Master boot sector read-write one time, the file system type mark of encrypted partition in hard disk partition table is changeed back and hidden value.
Do embodiment to be described further below in conjunction with Fig. 1-Fig. 6.
As shown in Figure 1, utilize encryption software to write the function of startup instrument, the file system type of encryption system subregion in the hard disk partition table after encrypting is designated and hides value, 12h or 17h, become concealed encrypted system partitioning.When portable hard drive is as starting when medium, encryption software has been taken over the start-up and operation of cryptographic operation system, in the time that read/write function is read Master boot sector, first in target internal memory, rewrites partition table, change back normal value by the file type mark of encryption system subregion, then carry out subsequent treatment.Then before subregion guidance code obtains control, on hard disk, change back normal value by the file type mark of encryption system subregion, to complete smoothly transitional startup work between real pattern and protected mode.After virtual disk driver loads, while creating the encryption and decryption main thread under Windows, when making main thread initializes, can utilize amended virtual disk driver read/write function to read and write once Master boot sector, the file type mark of encryption system subregion on hard disk is changeed back and hidden value.Utilizing virtual disk driver read/write function that the file system type mark of encryption system subregion is read as to normal value, is hiding value when writing hard disk.
As shown in Figure 2, it in dotted line frame, is groundwork flow process, encryption software has generated data to be written in internal memory, amendment code is modified the partition table in data to be written, change into and hide value by the file system type mark of subregion to be encrypted in internal memory, next write again in the reserve sector of hard disk.
As shown in Figure 3, it in dotted line frame, is groundwork flow process, utilize the reading writing harddisk function under encryption software real pattern, judged whether to read the content of Master boot sector by the read and write position parameter of read/write function, if read the content of Master boot sector, judge by the size in the 1st main partition in partition table whether system partitioning separates with boot partition.If separated, respectively the file system type of system partitioning and boot partition is identified at and in internal memory, changes normal value into; Otherwise the file system type of only changing system partitioning is designated normal value.Next carry out follow-up processing operation.
As shown in Figure 4, utilize the reading writing harddisk function under real pattern, start artificial 1 Master boot sector read-write operation, i.e. the dotted line frame part in Fig. 4 introduced in flow process in system.After read-write, the temporary transient normal value that recovers of the file system type of encryption system subregion mark on hard disk, the work such as the kernel initialization to carry out smoothly unloading phase.
As shown in Figure 5, its course of work is: utilize the encryption and decryption main thread function under Windows, the initial stage starting at main thread, utilize virtual disk driver read/write function, Master boot sector is carried out to read-write operation one time, so that the file system type mark of encryption system subregion in hard disk partition table is changed into and hides value.Definition Boolean type is rewritten marking variable, as whether through artificial mark of rewriting; Definition counter variable and threshold value, its function is: by counter variable and threshold value, rewriting operation is carried out after the read-write operation of certain number of times, be unlikely to have influence on the initial phase of system kernel.
As shown in Figure 6, in dotted line frame, be main working process.Utilize the read/write function of virtual disk driver, first judge whether to relate to partition table content according to the location parameter of read/write function, if relate to partition table content, judgement is read operation or write operation, read operation is revised in target internal memory if, changes the file system type mark of respective partition into normal value; Write operation needs to apply for one section of memory headroom if, by data Replica to be written to application memory headroom in, the file system type of revising therein respective partition is designated hides value, after having revised, the data source address parameter of write operation is replaced by the memory address of application.
The present invention tests on the solid-state portable hard drive that 32 Ultimate Windows7 are installed, and solid state hard disc adopts Jmicron jmf667h main control chip, and encryption software adopts Truecrypt7.1a version.Through improvement of the present invention, the Mobile hard disk system subregion after encryption has hiding drive function, and at portable hard drive when starting medium, can start smoothly and normally move the operating system in encrypted partition.In addition utilize VMware virtual machine to simulate respectively the encryption of Windows xp, Windows vista, Windows7, all realized the effect that scheme need to reach: the operating system in virtual machine utilizes WinHex software to check partition table, the file system type mark of encrypted partition is shown as normal value; Utilize WinHex software to check partition table outward at virtual machine, the file system type mark of encrypted partition is shown as hides value.
The present invention is based on the encryption software of virtual disk technology, in its source code, add the operation to partition table, without introducing third-party instrument, ensureing that the Windows of encrypting on portable hard drive can start on the basis of operation smoothly, has realized the automatic hidden function of mobile hard disc enciphering system subregion.Avoid operating operating system None-identified encryption system subregion, and then ejected the phenomenon of format manipulation prompting, stopped user and formatd the phenomenon of encrypted partition by mistake; In the time that the file system type of encryption system subregion is designated hiding value, operating operating system can not be that it distributes drive yet, further improve disguise and the security of encrypted partition.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (5)
1. a Method of Hiding System Partition, is characterized in that, comprises the following steps:
A. in internal memory, the file system type mark of system partitioning to be encrypted is changed into and hides value, then write in the reserve sector of hard disk, and after encrypting, make the file system type of encryption system subregion on hard disk be designated hiding value;
B. in the time that start-up routine is read Master boot sector, if relate to partition table content, in internal memory, rewrite partition table, read after changeing back normal value by the file type mark of respective encrypted system partitioning;
C. before subregion guidance code is written into, read-write Master boot sector, temporarily changes back normal value by the file type mark of respective encrypted system partitioning on hard disk;
D. in the encryption and decryption main thread initializes stage, read-write Master boot sector, changes back the file type mark of respective encrypted system partitioning on hard disk to hide value;
E. under system running state, during to hard disk partition table read operation, read again change the file system type mark of respective encrypted system partitioning into normal value in core buffer after; During to hard disk partition table write operation, apply for one section of memory headroom, data Replica to be written, in the core buffer of application, and is changed into the file system type mark of respective encrypted system partitioning in core buffer hide value, then write on hard disk.
2. the system as claimed in claim 1 subzone hiding method, is characterized in that, hides value for 17h or 12h.
3. the system as claimed in claim 1 subzone hiding method, it is characterized in that, in step a-e, comprise separately: judge whether to encryption system subregion and boot partition be same subregion, if be judged as same subregion, only the file system type mark of encryption system subregion changed into accordingly and hides value or change normal value operation into; If be judged as different subregions, the file system type mark of encryption system subregion and boot partition changed into accordingly and hides value or change normal value operation into simultaneously.
4. the Method of Hiding System Partition as claimed in claim 3, it is characterized in that, judge according to the size in the first main partition in partition table whether encryption system subregion and boot partition are same subregion: if the size in the first main partition is less than threshold value, to think that encryption system subregion separates with boot partition, otherwise will think that encryption system subregion and boot partition are same subregions.
5. the Method of Hiding System Partition as described in claim 1 to 4 any one, is characterized in that, described hard disk is portable hard drive.
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| CN201410204526.1A CN103984910B (en) | 2014-05-14 | 2014-05-14 | A kind of the Method of Hiding System Partition |
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| CN201410204526.1A CN103984910B (en) | 2014-05-14 | 2014-05-14 | A kind of the Method of Hiding System Partition |
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| CN107220071A (en) * | 2016-03-22 | 2017-09-29 | 北京蓝光引力网络股份有限公司 | A kind of method for guiding electronic equipment activation system |
| CN107392061A (en) * | 2017-07-21 | 2017-11-24 | 山东华芯半导体有限公司 | A kind of implementation method of the SSD subregion encipherment schemes based on modification MBR |
| CN107403113A (en) * | 2017-07-21 | 2017-11-28 | 山东华芯半导体有限公司 | A kind of method that HD encryption subregion drive is distributed and disappeared automatically |
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| CN105354506A (en) * | 2015-10-12 | 2016-02-24 | 百度在线网络技术（北京）有限公司 | File hiding method and apparatus |
| CN105354506B (en) * | 2015-10-12 | 2018-06-19 | 百度在线网络技术（北京）有限公司 | The method and apparatus of hidden file |
| CN107220071A (en) * | 2016-03-22 | 2017-09-29 | 北京蓝光引力网络股份有限公司 | A kind of method for guiding electronic equipment activation system |
| CN108255573A (en) * | 2016-12-29 | 2018-07-06 | 北京国双科技有限公司 | Virtual machine starts restorative procedure and server |
| CN107392061A (en) * | 2017-07-21 | 2017-11-24 | 山东华芯半导体有限公司 | A kind of implementation method of the SSD subregion encipherment schemes based on modification MBR |
| CN107403113A (en) * | 2017-07-21 | 2017-11-28 | 山东华芯半导体有限公司 | A kind of method that HD encryption subregion drive is distributed and disappeared automatically |
| CN108287990B (en) * | 2017-12-26 | 2021-08-24 | 努比亚技术有限公司 | File abnormal operation processing method, electronic equipment and computer readable storage medium |
| CN108287990A (en) * | 2017-12-26 | 2018-07-17 | 努比亚技术有限公司 | File abnormal operation processing method, electronic equipment and computer readable storage medium |
| CN108009447A (en) * | 2017-12-27 | 2018-05-08 | 湖南国科微电子股份有限公司 | A kind of fdisk hidden method, device and hard disk |
| CN108009447B (en) * | 2017-12-27 | 2021-05-14 | 湖南国科微电子股份有限公司 | Hard disk partition hiding method and device and hard disk |
| CN110442301A (en) * | 2018-05-05 | 2019-11-12 | 南京橡东信息科技有限公司 | A kind of method and device of the USB flash disk subregion for intranet security |
| CN108833090A (en) * | 2018-05-25 | 2018-11-16 | 四川斐讯信息技术有限公司 | It is a kind of to store the encryption method of equipment, decryption method and storage equipment |
| CN110413291A (en) * | 2019-07-18 | 2019-11-05 | 贵阳朗玛信息技术股份有限公司 | Movable storage medium and preparation method thereof |
| CN114546503A (en) * | 2022-02-11 | 2022-05-27 | 联想开天科技有限公司 | Hard disk-based booting method and electronic equipment |
| CN117194333A (en) * | 2023-11-07 | 2023-12-08 | 中孚信息股份有限公司 | File hiding method, system, equipment and medium based on NTFS (non-Uniform resource locator) file system |
| CN117194333B (en) * | 2023-11-07 | 2024-02-20 | 中孚信息股份有限公司 | File hiding method, system, equipment and medium based on NTFS (non-Uniform resource locator) file system |
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