CN101552031B - Portable memory and partitioned data protection method thereof - Google Patents
Portable memory and partitioned data protection method thereof Download PDFInfo
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- CN101552031B CN101552031B CN2008101031124A CN200810103112A CN101552031B CN 101552031 B CN101552031 B CN 101552031B CN 2008101031124 A CN2008101031124 A CN 2008101031124A CN 200810103112 A CN200810103112 A CN 200810103112A CN 101552031 B CN101552031 B CN 101552031B
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Abstract
The invention provides a portable memory and a partitioned data protection method thereof. The portable memory comprises an interface for connecting external equipment, and is characterized by also comprising a read-write control unit, a memory area selection unit and a memory unit, wherein the memory unit comprises a personal memory area and a shared memory area; the storage area selection unit is used for receiving the identity information of the current user and judging whether the current user is an authorized user, if so, the personal storage area is selected as the current storage area; otherwise, selecting the shared storage area as the current storage area; the read-write control unit is connected with the interface and the storage unit and is used for realizing the read-write operation of the current storage area. According to the invention, data sharing and security protection of private data can be realized simultaneously.
Description
Technical field
The present invention relates to technical field of data storage, concrete, relate to a kind of portable memory and partitioned data protecting method thereof.
Background technology
Portable memory like USB flash disk, has become people storage and important means and instrument of swap data file in work and life.They are offering people's shared data simultaneously easily, and also with the major hidden danger of individual privacy data security, particularly along with the continuous rising of USB flash disk memory capacity, this problem is more outstanding.For example, lose or borrow and to give other people when using when portable memory, the individual private data that leaves in the portable memory possibly obtained by other people, thereby brings loss to the user.
In order to improve safety of user data, prior art solutions has following several kinds:
Through software mode, relevant folder in the storer or file directory are encrypted.Access encrypted file or the content in the file directory need input password.The shortcoming of this method is that the user need encrypt associated documents or file directory, decryption oprerations, and must keep password firmly in mind.Since the password of modern's daily need memory of a great variety (as, various bank cards, credit card, gate inhibition's card etc.), in case forget, will cause file to open, cause loss of data.
Adopt modes such as code keypad, when needs visit portable memory, require the correct password of input.Obviously, this mode also needs the user to keep password firmly in mind.And this mode is shared restricting data.For example, USB flash disk is used to shared data between the colleague usually, if when the visit USB flash disk, must import correct password, obviously can share data and bring great inconvenience.
Summary of the invention
The purpose of the embodiment of the invention provides a kind of portable memory and partitioned data protecting method thereof; Identity information according to the user; Select Personal Storage district or shared memory as current memory block; Thereby realized using portable memory shared data and the function of privacy protection is provided between the user easily, increased the availability of portable memory as the data of authorized user.
For solving the problems of the technologies described above, one embodiment of the present of invention provide a kind of portable memory, comprise the interface that is used to connect external unit, also comprise:
Storage unit comprises Personal Storage district and shared memory;
The memory block selected cell is used to receive current user's identity information, and judges according to said current user's identity information whether said current user is authorized user, if then select said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block;
Read-write control unit connects said interface and said storage unit, is used to realize the read-write operation to said current memory block.
Preferably, said memory block selected cell comprises chip select circuit and mechanical lock;
Said chip select circuit is used for after said mechanical lock is unlocked, and selects said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block.
Preferably, said chip select circuit comprises:
Touch-pressure switch is used for unlatching or locking according to said mechanical lock, control closed in itself or disconnection;
The first chip selection signal control module; Be used to connect said read-write control unit and shared memory; Be used for when said touch-pressure switch breaks off; The chip selection signal of said read-write control unit is sent to said shared memory, and when said touch-pressure switch was closed, it is invalid that the chip selection signal of said shared memory is set to;
The second chip selection signal control module; Be used to connect said read-write control unit and Personal Storage district; Be used for when said touch-pressure switch is closed; The chip selection signal of said read-write control unit is sent to said Personal Storage district, and when said touch-pressure switch broke off, it is invalid that the chip selection signal in said Personal Storage district is set to.
Preferably, said memory block selected cell comprises relatively electricity of chip select circuit, press-type switch arrays and key, road;
Said press-type switch arrays are used for when being inserted by hardware keys, exporting the digital cipher information of said hardware keys;
Said key comparator circuit is used to judge whether the digital cipher information of said press-type switch arrays output is identical with the digital cipher information of the sign authorized user identities that prestores;
Said chip select circuit is used for when being identical, selecting said Personal Storage district as current memory block in the judged result of said key comparator circuit; Otherwise, select said shared memory as current memory block.
Preferably, said memory block selected cell comprises chip select circuit and fingerprint comparing unit;
Said fingerprint comparing unit is used to receive user's finger print information, and compares with the finger print information of the authorized user that prestores;
Said chip select circuit is used for when being identical, selecting said Personal Storage district as current memory block at the comparative result of said fingerprint comparing unit; Otherwise, select said shared memory as current memory block.
Preferably, said interface comprises: general-purpose serial bus USB interface, the IEEE of IEEE 1394 interfaces or PCMCIA card international federation pcmcia interface.
Embodiments of the invention also provide a kind of partitioned data protecting method of portable memory, comprising:
Personal Storage district and shared memory are set in the storage unit of said portable memory;
Receive current user's identity information, and judge whether said current user is authorized user, if then select said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block.
Preferably; The current user's of said reception identity information; And judge that whether said current user is that the step of authorized user is specially: insert the key that is arranged on the mechanical lock on the said portable memory according to said current user and whether mate said mechanical lock, judge whether said current user is authorized user.
Preferably, the current user's of said reception identity information, and judge that whether said current user is that the step of authorized user comprises:
Insert the digital cipher information that hardware keys produced that is arranged on the press-type switch arrays on the said portable memory according to said current user; Whether whether identical with the digital cipher information of the sign authorized user identities that prestores, judge whether said current user is authorized user.
Preferably; The said current user's of said reception identity information; And judge that whether said current user is that authorized user is whether identical with the finger print information of the said authorized user that prestores according to said current user's finger print information, judges whether said current user is authorized user.
Another embodiment of the present invention also provides a kind of portable memory, and said portable memory comprises:
Personal Storage district and shared memory;
One touch-pressure switch;
One mechanical lock comprises:
One key is used to open said mechanical lock;
Mechanical lock includes a lockhole, is used to receive the insertion of said key;
Dead bolt is used for when said key inserts said lockhole and opens said mechanical lock, controlling the closure of said touch-pressure switch, makes said Personal Storage district as current memory block; When said mechanical lock is inserted into said key lock, control the disconnection of said touch-pressure switch, make said shared memory as current memory block.
One or more embodiment of the present invention has following beneficial effect at least:
Because Personal Storage district and shared memory are storage spaces independently, unauthorized user can't be seen the Personal Storage district, thereby present embodiment has higher security with respect to prior art;
Adopt hardware keys (mechanical lock adds key), the user need not to remember any password, can not forget because of password to cause loss of data;
Simultaneously, the user need not through software mode private data to be carried out, thereby the portable memory block of present embodiment is used simple, has ease for use preferably;
At last, adopt the mode of mechanical lock, discern user's identity, it is embodied as low, and is highly suitable for large-scale production, therefore has cost advantage preferably.
Description of drawings
Fig. 1 is the structural representation of the portable memory of first embodiment of the invention;
Fig. 2 is that the circuit of the portable memory of first embodiment of the invention is realized synoptic diagram;
Fig. 3 A is the view of mechanical lock when not opening;
Fig. 3 B is the view of mechanical lock after unlatching;
Fig. 4 A is the synoptic diagram of the hardware keys of second embodiment of the invention;
Fig. 4 B is the synoptic diagram that the hardware keys of second embodiment of the invention is inserted the press-type switch arrays;
Embodiment
The portable memory of the embodiment of the invention and partitioned data protecting method thereof; Through the memory block being divided into separate Personal Storage district and shared memory; Identity information according to the user; For this user selects corresponding memory block, thereby both can realize the function of portable memory shared data, can privacy protection be provided for the data of authorized user again.
Below in conjunction with accompanying drawing various embodiments of the invention are further elaborated.
< first embodiment >
Portable memory is generally used for connecting the read-write equipment of similar computing machine, can operation such as read and write to portable memory through read-write equipment.Usually, the interface that is used to connect portable memory and read-write equipment comprises: USB (USB) interface, IEEE (IEEE) 1394 interfaces and PCMCIA card international federation (PCMCIA) interface etc.
As shown in Figure 1, the portable memory 1 that provides in the first embodiment of the invention comprises: interface 11 and main part 12.Wherein, interface 11 is used to connect outside read-write equipment, and what this interface 11 was concrete can be USB interface, IEEE 1394 interfaces or pcmcia interface etc.
Specifically comprise again in the main part 12:
Memory block selected cell 123 is used to receive current user's identity information, and judges whether current user is authorized user, if then select Personal Storage district 1222 as current memory block; Otherwise, select said shared memory 1221 as current memory block;
Read-write control unit 121 connects said interface 11 and storage unit 122, is used to realize the read-write operation to memory block selected cell 123 selected current memory blocks.For example, if interface 11 is a USB interface, this read-write control unit 121 is exactly the USB read-write control unit accordingly so.
Please with reference to Fig. 2, Fig. 2 is that the circuit of portable memory shown in Figure 1 is realized synoptic diagram.Among Fig. 2, read-write control unit 121 is connected through the read-write equipment of interface with the outside, through bus respectively with storage unit 122 in Personal Storage district 1222 be connected with shared memory 1221.Through bus, can be between read-write control unit 121 and Personal Storage district 1222 (or shared memory 1221) control signal such as data signal or read/write, thereby realize read-write operation to storage unit 122.
Among Fig. 2, the chip selection signal of read-write control unit 121 outputs is used for confirming its operated memory block, and this chip selection signal is connected on the chip selection signal corresponding in shared memory 1221 and the Personal Storage district 1222 through two triple gates respectively.Control through 123 pairs of said chip selection signals of memory block selected cell, thereby realized the selection of current memory block.Here; The chip selection signal of supposing read-write control unit 121 outputs is effectively low; Be that chip selection signal representes to choose this memory block when being digital signal " 0 ", as shown in Figure 2, the chip selection signal in shared memory 1221 and Personal Storage district 1222 all is to be connected to power supply VCC through resistance R; Promptly through on draw processing, the default conditions of the chip selection signal in shared memory 1221 and Personal Storage district 1222 all are high (being digital signal " 1 ").Can find out to have only when corresponding triple gate conducting, the chip selection signal (0) of read-write control unit 121 outputs just can be selected shared memory 1221 or Personal Storage district 1222, as current memory block.Because the enable signal of two triple gates all is a switching signal; And the enable signal of the triple gate of shared memory 1221 correspondences is effectively low; The enable signal of the triple gate that Personal Storage district 1222 is corresponding is effectively high, and therefore, switching signal can only one of them triple gate of conducting at synchronization; That is to say, can only select one of them memory block as current memory block at synchronization read-write control unit 121.Touch-pressure switch default conditions shown in Fig. 2 break off; Only just can conducting after touched, therefore, the default conditions of said switching signal are 0 (resistance R ground connection); Be under the default conditions; The triple gate conducting of shared memory 1221 correspondences, the not conducting of triple gate of Personal Storage district 1222 correspondences, thus the current memory block of read-write control unit 121 is shared memories 1221 by default; And when touch-pressure switch was closed, the current memory block of read-write control unit 121 then was Personal Storage district 1222.
Through analysis to circuit shown in Figure 2, can find out, the realization through touch-pressure switch to the selection of current memory block.In order to guarantee that the Personal Storage district 1222 that preserves individual private data is not having can not to be visited the key (not shown among Fig. 2) that the memory block selected cell 123 among Fig. 2 also includes mechanical lock and is complementary with this mechanical lock under the situation of authorizing.Said mechanical lock is installed on the said touch-pressure switch.Said key is had by authorized user, in order to the identity of sign authorized user.Shown in Fig. 3 A and Fig. 3 B, said mechanical lock 3 comprises the mechanical lock 30 that is provided with lockhole 31, also includes dead bolt 32.Do not insert said lockhole 31 at said key, when said mechanical lock was locked, dead bolt 32 did not eject, and this moment, touch-pressure switch was in off-state; When the said key of insertion and after turning an angle, said mechanical lock 30 is unlocked, and dead bolt 32 ejects also compressing touch-pressure switch, thereby touch-pressure switch is closed.
Here, can regard as first chip selection signal control module such as triple gate that is connected with the chip selection signal of shared memory among Fig. 2 and resistance R.This first chip selection signal control module; Be used to connect said read-write control unit and shared memory; Be used for when said touch-pressure switch breaks off; The chip selection signal of said read-write control unit is sent to said shared memory, and when said touch-pressure switch was closed, it is invalid that the chip selection signal of said shared memory is set to.The triple gate that the chip selection signal with the Personal Storage district among Fig. 2 is connected and resistance R etc. are regarded the second chip selection signal control module as.This second chip selection signal control module; Be used to connect said read-write control unit and Personal Storage district; Be used for when said touch-pressure switch is closed; The chip selection signal of said read-write control unit is sent to said Personal Storage district, and when said touch-pressure switch broke off, it is invalid that the chip selection signal in said Personal Storage district is set to.
Can find out that from the above in the present embodiment, the user who only has the key that is complementary with said mechanical lock just can visit the Personal Storage district, thereby guarantee the security in Personal Storage district.The advantage of present embodiment is: because Personal Storage district and shared memory are storage spaces independently, unauthorized user can't be seen the Personal Storage district, thereby present embodiment has higher security with respect to prior art; Because adopt hardware keys (mechanical lock adds key), the user need not to remember any password, can not forget because of password to cause loss of data; Simultaneously, the user need not through software mode private data to be carried out the encryption and decryption operation, thereby the portable memory block of present embodiment is used simple, has ease for use preferably; At last, the cost of mechanical lock is low, and is highly suitable for large-scale production, so the portable memory of present embodiment has cost advantage preferably.
The partitioned data protecting method of a kind of portable memory of present embodiment may further comprise the steps:
Step S11 is provided with Personal Storage district and shared memory in the storage unit of portable memory, and on said portable memory, mechanical lock is set;
Step S12, whether the key that inserts said mechanical lock according to current user matees said mechanical lock, judges whether current user is authorized user;
Step S13 if current user is an authorized user, then selects said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block.
< second embodiment >
Present embodiment has and is similar to circuit structure shown in Figure 2 among first embodiment; The difference of itself and first embodiment is; In the present embodiment, said switching signal does not produce through the control of mechanical lock control touch-pressure switch, but produce through the control of multiconductor coded lock.
Said multiconductor coded lock includes the hardware keys of press-type switch arrays, key comparator circuit and sign authorized user identities.Wherein, shown in Fig. 4 A, said hardware keys 40 is solid thin-sheets 41 that are provided with circular hole 42 matrixes.Whether get through according to each circular hole 42, can obtain permutation and combination data, can be combined into 1024 keys like ten circular holes 42 among Fig. 4 A.Shown in Fig. 4 B; When this hardware keys 40 is inserted press-type switch arrays 43; Whether get through according to the circular hole on the hardware keys 40 42; Each touch-pressure switch 44 on the press-type switch arrays 43 has different on off states, and in view of the above, press-type switch arrays 43 can be exported the digital cipher information of a current hardware keys.When the hardware keys of authorized user is inserted; Through the key comparator circuit; The digital cipher information of press-type switch arrays 43 outputs is compared with the digital cipher information of the sign authorized user identities that prestores; If both are identical, then export the switching signal of a high level (1), thereby select the Personal Storage district as current memory block; Otherwise, export the switching signal of a low level (0), thereby select shared memory as current memory block.
The partitioned data protecting method of a kind of portable memory of present embodiment may further comprise the steps:
Step S21 is provided with Personal Storage district and shared memory in the storage unit of portable memory, and on said portable memory, the press-type switch arrays is set;
Whether whether step S22 inserts the digital cipher information that hardware keys produced of said press-type switch arrays according to current user, identical with the digital cipher information of the sign authorized user identities that prestores, and judges whether current user is authorized user;
Step S23 if current user is an authorized user, then selects said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block.
< the 3rd embodiment >
Portable memory in the present embodiment; Comprise interface, read-write control unit, memory block selected cell and storage unit, wherein, said storage unit comprises Personal Storage district and shared memory; Said memory block selected cell comprises chip select circuit and fingerprint comparing unit
Said fingerprint comparing unit is used to receive user's finger print information, and compares with the finger print information of the authorized user that prestores;
Said chip select circuit is used for when being identical, selecting said Personal Storage district as current memory block at the comparative result of said fingerprint comparing unit; Otherwise, select said shared memory as current memory block.
Said read-write control unit connects said interface and said storage unit, is used to realize the read-write operation to current memory block.
The partitioned data protecting method of a kind of portable memory of present embodiment may further comprise the steps:
Step S31 is provided with Personal Storage district and shared memory in the storage unit of portable memory;
Step S32, whether identical according to current user's finger print information with the finger print information of the authorized user that prestores, judge whether current user is authorized user;
Step S33 if current user is an authorized user, then selects said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block.
< the 4th embodiment >
Present embodiment provides a kind of portable memory, and this portable memory comprises:
Personal Storage district and shared memory;
One touch-pressure switch;
One mechanical lock comprises:
One key is used to open said mechanical lock;
Mechanical lock includes a lockhole, is used to receive the insertion of said key;
Dead bolt is used for when said key inserts said lockhole and opens said mechanical lock, controlling the closure of said touch-pressure switch, makes said Personal Storage district as current memory block; When said mechanical lock is inserted into said key lock, control the disconnection of said touch-pressure switch, make said shared memory as current memory block.
The above only is an embodiment of the present invention; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; Can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.
Claims (7)
1. a portable memory comprises the interface that is used to connect external unit, it is characterized in that, also comprises:
Storage unit comprises Personal Storage district and shared memory;
The memory block selected cell is used to receive current user's identity information, and judges according to said current user's identity information whether said current user is authorized user, if then select said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block;
Read-write control unit connects said interface and said storage unit, is used to realize the read-write operation to said current memory block;
Said memory block selected cell comprises chip select circuit and mechanical lock;
Said chip select circuit is used for after said mechanical lock is unlocked, and selects said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block.
2. portable memory as claimed in claim 1 is characterized in that, said chip select circuit comprises:
Touch-pressure switch is used for unlatching or locking according to said mechanical lock, control closed in itself or disconnection;
The first chip selection signal control module; Be used to connect said read-write control unit and shared memory; Be used for when said touch-pressure switch breaks off; The chip selection signal of said read-write control unit is sent to said shared memory, and when said touch-pressure switch was closed, it is invalid that the chip selection signal of said shared memory is set to;
The second chip selection signal control module; Be used to connect said read-write control unit and Personal Storage district; Be used for when said touch-pressure switch is closed; The chip selection signal of said read-write control unit is sent to said Personal Storage district, and when said touch-pressure switch broke off, it is invalid that the chip selection signal in said Personal Storage district is set to.
3. a portable memory comprises the interface that is used to connect external unit, it is characterized in that, also comprises:
Storage unit comprises Personal Storage district and shared memory;
The memory block selected cell is used to receive current user's identity information, and judges according to said current user's identity information whether said current user is authorized user, if then select said Personal Storage district as current memory block; Otherwise, select said shared memory as current memory block;
Read-write control unit connects said interface and said storage unit, is used to realize the read-write operation to said current memory block;
Said memory block selected cell comprises chip select circuit, press-type switch arrays and key comparator circuit;
Said press-type switch arrays are used for when being inserted by hardware keys, exporting the digital cipher information of said hardware keys;
Said key comparator circuit is used to judge whether the digital cipher information of said press-type switch arrays output is identical with the digital cipher information of the sign authorized user identities that prestores;
Said chip select circuit is used for when being identical, selecting said Personal Storage district as current memory block in the judged result of said key comparator circuit; Otherwise, select said shared memory as current memory block.
4. portable memory as claimed in claim 3 is characterized in that, said interface comprises: general-purpose serial bus USB interface, the IEEE of IEEE 1394 interfaces or PCMCIA card international federation pcmcia interface.
5. the partitioned data protecting method of a portable memory is characterized in that, comprising:
Receive current user's identity information, and judge whether said current user is authorized user, if then select the Personal Storage district as current memory block; Otherwise, select shared memory as current memory block;
The current user's of said reception identity information; And judge that whether said current user is that the step of authorized user is specially: insert the key that is arranged on the mechanical lock on the said portable memory according to said current user and whether mate said mechanical lock, judge whether said current user is authorized user.
6. the partitioned data protecting method of a portable memory is characterized in that, comprising:
Receive current user's identity information, and judge whether said current user is authorized user, if then select the Personal Storage district as current memory block; Otherwise, select shared memory as current memory block;
The current user's of said reception identity information; And judge that whether said current user is that the step of authorized user comprises: insert the digital cipher information that hardware keys produced that is arranged on the press-type switch arrays on the said portable memory according to said current user; Whether whether identical with the digital cipher information of the sign authorized user identities that prestores, judge whether said current user is authorized user.
7. a portable memory is characterized in that, said portable memory comprises:
Personal Storage district and shared memory;
One touch-pressure switch;
One mechanical lock comprises:
One key is used to open said mechanical lock;
Mechanical lock includes a lockhole, is used to receive the insertion of said key;
Dead bolt is used for when said key inserts said lockhole and opens said mechanical lock, controlling the closure of said touch-pressure switch, makes said Personal Storage district as current memory block; When said mechanical lock is inserted into said key lock, control the disconnection of said touch-pressure switch, make said shared memory as current memory block.
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| CN2008101031124A CN101552031B (en) | 2008-03-31 | 2008-03-31 | Portable memory and partitioned data protection method thereof |
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| CN2008101031124A CN101552031B (en) | 2008-03-31 | 2008-03-31 | Portable memory and partitioned data protection method thereof |
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| CN101552031B true CN101552031B (en) | 2012-05-23 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102347079A (en) * | 2010-08-02 | 2012-02-08 | 雅格罗技（北京）科技有限公司 | Device and method using password protection memory |
| CN104064210A (en) * | 2013-11-14 | 2014-09-24 | 苏州天趣信息科技有限公司 | USB (universal serial bus) flash drive and using method thereof |
| CN106254358B (en) * | 2016-08-09 | 2019-11-29 | 广东小天才科技有限公司 | Rapid file encryption and decryption method and device |
| CN106446654B (en) * | 2016-10-21 | 2019-03-29 | 国网黑龙江省电力有限公司信息通信公司 | Input output device of computer partition method based on fingerprint recognition |
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| US6213403B1 (en) * | 1999-09-10 | 2001-04-10 | Itt Manufacturing Enterprises, Inc. | IC card with fingerprint sensor |
| CN1866224A (en) * | 2005-05-20 | 2006-11-22 | 联想(北京)有限公司 | Mobile memory device and method for accessing encrypted data in mobile memory device |
| CN1991799A (en) * | 2005-12-31 | 2007-07-04 | 联想(北京)有限公司 | Safety memory device and data management method |
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2008
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6213403B1 (en) * | 1999-09-10 | 2001-04-10 | Itt Manufacturing Enterprises, Inc. | IC card with fingerprint sensor |
| CN1866224A (en) * | 2005-05-20 | 2006-11-22 | 联想(北京)有限公司 | Mobile memory device and method for accessing encrypted data in mobile memory device |
| CN1991799A (en) * | 2005-12-31 | 2007-07-04 | 联想(北京)有限公司 | Safety memory device and data management method |
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