CN103856499A - Cloud storage method, cloud storage device, cloud storage data downloading method and cloud storage data downloading device - Google Patents
Cloud storage method, cloud storage device, cloud storage data downloading method and cloud storage data downloading device Download PDFInfo
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- CN103856499A CN103856499A CN201210499475.0A CN201210499475A CN103856499A CN 103856499 A CN103856499 A CN 103856499A CN 201210499475 A CN201210499475 A CN 201210499475A CN 103856499 A CN103856499 A CN 103856499A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/10—File systems; File servers
- G06F16/18—File system types
- G06F16/182—Distributed file systems
- G06F16/1824—Distributed file systems implemented using Network-attached Storage [NAS] architecture
- G06F16/1827—Management specifically adapted to NAS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/14—Network architectures or network communication protocols for network security for detecting or protecting against malicious traffic
- H04L63/1441—Countermeasures against malicious traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
- H04L67/1097—Protocols in which an application is distributed across nodes in the network for distributed storage of data in networks, e.g. transport arrangements for network file system [NFS], storage area networks [SAN] or network attached storage [NAS]
Abstract
The invention discloses a cloud storage method, a cloud storage device, a cloud storage data downloading method and a cloud storage data downloading device. The cloud storage method comprises the following steps: after a data storage request is received, data needing to be uploaded is divided into a plurality of groups of sub data, and different servers are allocated for the plurality of groups of sub data; and the plurality of groups of sub data are uploaded to the corresponding servers, and the mapping relationship between each group of sub data and the corresponding server is updated after the plurality of groups of sub data are successfully uploaded. According to the cloud storage method, complete user data is split into a plurality of parts which are respectively stored in different service providers. Therefore, that a single service provider cannot acquire privacy data of users is ensured, and user information leakage is not caused even if the servers are attacked.
Description
Technical field
The present invention relates to communication technical field, relate in particular to a kind of cloud storage means and device, cloud storage data download method and device.
Background technology
The current epoch are epoch of knowledge huge explosion, and traditional memory technology can not meet user's demand.Along with the fusion of mechanics of communication and memory technology, cloud storage development is very rapid.Cloud storage allows user can access oneself data anywhere, preserves easily the information of oneself.Cloud is stored as user highly reliable and high available storage system is provided, and applies more and more extensive.Meanwhile, cloud storage has also brought the problem of privacy of user, and not only the service provider of cloud storage may abuse user's private data, and user also will be in the face of causing the potential risk of information leakage due to assault.
Along with user data explosive growth, it is particularly important that the extensibility of cloud storage also seems.Therefore, need both safety of one badly, autgmentability strong cloud storage means again, to meet the growing cloud storage demand of user.
Summary of the invention
Main purpose of the present invention is to provide a kind of safe cloud storage means and device, cloud storage data download method and device.
In order to achieve the above object, the present invention proposes a kind of cloud storage means, comprising:
Receive after data storage request, the data that will upload are divided into multicomponent data, and distribute different servers for it;
By described multicomponent data upload to corresponding server, and after uploading successfully mapping relations between every component data and server in updated data table.
Preferably, described by multicomponent data upload to corresponding server, and in updated data table, before the mapping relations between every component data and server, also comprise after uploading successfully:
Described server is carried out to authorization identifying to judge that whether described server is as validated user;
If so, the information of described server is saved in to tables of data.
Preferably, the described divided data of group more than uploading described in is organized at the most described server and before updated data table, is also comprised simultaneously:
Judge whether described divided data needs to encrypt;
If so, described divided data is encrypted.
The present invention further proposes a kind of cloud storage device, comprising:
Packet module, is divided into multicomponent data for the data that will upload, and selects the corresponding server of many groups corresponding with it according to virtual directory;
Data upload module, organizes described server updated data table simultaneously at the most for uploading the described divided data of many groups;
Preferably, this cloud storage device also comprises:
Upload initialization module, for described server being carried out to authorization identifying to judge that whether described server is as validated user; If so, the information of described server is saved in to tables of data.
Preferably, this cloud storage device also comprises:
Encrypting module, for judging whether described divided data needs to encrypt; If so, described divided data is encrypted.
Preferably, described cloud storage device is arranged on server or in terminal.
The present invention also proposes a kind of cloud storage data download method, comprising:
To storing the address information of the respective server of divided data in the download request retrieve data table of divided data, from respective server, download divided data according to user;
Divided data is reverted to metadata.
Preferably, described according to user to storing the address information of the respective server of divided data in the download request retrieve data table of divided data, from respective server, download before divided data and also comprise:
Described server is carried out to authorization identifying to judge that whether described server is as validated user;
If so, the information of described server is saved in to tables of data.
Preferably, described divided data reverted to before metadata and also comprised:
The encryption identification position of the divided data of preserving according to tables of data, judges whether described divided data is the divided data of encrypting;
If so, described divided data is decrypted.
The present invention further also proposes a kind of cloud storage data download apparatus, comprising:
Data download module for according to user, the download request retrieve data table of divided data being stored the address information of the respective server of divided data, is downloaded divided data from respective server;
Data restoring module, for reverting to metadata by divided data.
Preferably, this cloud storage data download apparatus also comprises:
Download initializes module, for carrying out authorization identifying to judge that whether described server is as validated user to described server; If so, the information of described server is saved in to tables of data.
Preferably, this cloud storage data download apparatus also comprises:
Deciphering module, for judging whether described divided data is the divided data of encrypting; If so, described divided data is decrypted.
The cloud storage means proposing in the embodiment of the present invention, in the time of uploading data, by complete user data is split as to some parts, be stored in respectively different service providers, can guarantee that so single service provider cannot obtain user's private data, even when server is attacked, can not cause user profile to be revealed yet.In addition, by the integration of cloud storage resources that multiple cloud storage service provider is provided, make user can with memory space can be able to dynamic expansion easily.
Accompanying drawing explanation
Fig. 1 is the structural representation of cloud storage means the first embodiment of the present invention;
Fig. 2 is the structural representation of cloud storage means the second embodiment of the present invention;
Fig. 3 is the structural representation of cloud storage means the 3rd embodiment of the present invention;
Fig. 4 is the structural representation of cloud storage device the first embodiment of the present invention;
Fig. 5 is the structural representation of cloud storage device the second embodiment of the present invention;
Fig. 6 is the structural representation of cloud storage device the 3rd embodiment of the present invention;
Fig. 7 is the structural representation of cloud storage data download method of the present invention the first embodiment;
Fig. 8 is the structural representation of cloud storage data download method of the present invention the second embodiment;
Fig. 9 is the structural representation of cloud storage data download method of the present invention the 3rd embodiment;
Figure 10 is the structural representation of cloud storage data download apparatus of the present invention the first embodiment;
Figure 11 is the structural representation of cloud storage data download apparatus of the present invention the second embodiment;
Figure 12 is the structural representation of cloud storage data download apparatus of the present invention the 3rd embodiment.
Realization, functional characteristics and the advantage of the object of the invention, in connection with embodiment, are described further with reference to accompanying drawing.
Embodiment
Be described further with regard to technical scheme of the present invention below in conjunction with drawings and the specific embodiments.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
The present invention proposes a kind of cloud storage means.
With reference to Fig. 1, Fig. 1 is the structural representation of cloud storage means the first embodiment of the present invention.
A kind of cloud storage means proposing in the embodiment of the present invention, comprising:
Step S10, receives after data storage request, and the data that will upload are divided into multicomponent data, and distributes different servers for it;
First the data that need to upload Cloud Server are divided into multicomponent data, so that corresponding with available many groups server.Packet rule is as follows: first user sets a threshold value and stipulate the size of each divided data, for example 100kb, and the data of then needs being uploaded are divided into the packet of threshold size, and are every component data number.Carry out unified management by the server of the some operators to used again, in the time having data storage requirement, can select the many groups server in management, therefrom select some servers and store multiple divided data.
Because every component data are all incomplete, therefore the commercial city that provides of each server can not obtain user's privacy.Therefore,, even if individual server is caused data to be revealed by attack, also can not cause damage to user.
Step S20, by multicomponent data upload to corresponding server, and after uploading successfully mapping relations between every component data and server in updated data table.
By extremely corresponding the multicomponent data upload of processing server.Mapping relations between every component data and server in updated data table after upload procedure, the path of simultaneously every a divided data being preserved is kept under virtual directory.
The cloud storage means proposing in the embodiment of the present invention, in the time of uploading data, by complete user data is split as to multiple parts, and multiple divided data are stored in respectively to different service providers, can guarantee that so single service provider cannot obtain user's private data, even when server is attacked, can not cause user profile to be revealed yet.In addition, by the integration of cloud storage resources that multiple cloud storage service provider is provided, make user can with memory space can be able to dynamic expansion easily.
With reference to Fig. 2, Fig. 2 is the structural representation of cloud storage means the second embodiment of the present invention.
A kind of cloud storage means that second embodiment of the invention proposes on the basis of a upper embodiment, also comprised before execution step S10:
Step S30, judges whether server is validated user;
If so, perform step S31; If not, get back to step S30.
Step S31, is saved in tables of data by the information of server.
After execution step S31, enter step S10.
Whole process is actual is exactly to be an initialized process.First server is carried out to authorization identifying, judge whether server is validated user, in the time judging that server is validated user, preserve information the updated data table of server.If validated user, the information of just preserving Cloud Server in user's tables of data, comprises the information such as performance, capacity, bandwidth, expense, and in the time of server update, server list is also upgraded thereupon.In the time judging server not for validated user, continue next carrier server to carry out authorization identifying, until all servers are all authenticated complete.If use for the first time, also need account and the password of inputting one by one existing operator to carry out adaptation.
By initialization procedure, server is carried out to authorization identifying, further strengthened the fail safe of this cloud storage means.
With reference to Fig. 3, Fig. 3 is the structural representation of cloud storage means the 3rd embodiment of the present invention.
A kind of cloud storage means that third embodiment of the invention proposes on the basis of a upper embodiment, also comprises between execution step S10 and step S20:
Step S40, judges whether divided data needs to encrypt; If so, perform step S41; If not, perform step S20.After execution step S41, enter step S20.
In tables of data, the divided data of uploading encryption is increased to mark.Encryption method can freely design, can be at the embedded encryption chip of device.The present embodiment proposes a kind of encryption method: choose at random the divided data that is numbered m as key, this divided data and other all divided data are carried out after xor operation with it, then upload, and numbering m divided data does not operate.Corresponding decryption method is: the divided data of all encryptions be numbered m divided data xor operation again, thereby decode raw score certificate.
In addition,, for the processing aspect of divided data, not merely only limit to cryptographic operation.Can introduce encoding scheme to divided data, such as by each divided data is added to redundant information and check information, increase the robustness of data storage.
Determine according to the performance of device whether divided data encrypts.If the performance of cloud storage device is enough supported the operation of encrypting, transmit again divided data after can selecting divided data to be encrypted, can further protect user profile like this.If select not encrypt, directly transmit divided data, can reduce like this load of device, reduce energy consumption.Certainly, in order to strengthen fail safe, in the situation that device performance is enough supported, transmission after preferably selecting to encrypt.Which kind of, as for selecting encryption method, can freely expand.
By whether the divided data in uploading onto the server freely being selected to be encrypted according to the performance of different device, make cloud storage means more flexible, can introduce different divided data processing methods, and not merely only limit to cryptographic operation, make the storage of divided data safer simultaneously.
The present invention proposes a kind of cloud storage device.
With reference to Fig. 4, Fig. 4 is the structural representation of cloud storage device the first embodiment of the present invention.
In the present embodiment, cloud storage device comprises:
Data upload module 20, organizes described server updated data table simultaneously at the most for uploading the described divided data of many groups;
The data that packet module 10 will be uploaded are divided into multicomponent data, and select the corresponding server of many groups corresponding with it according to virtual directory.Packet rule is as follows: first user can set a threshold value and stipulate the size of each packet to device, for example 100kb, and the data that then packet module 10 is uploaded needs are divided into the packet of threshold size, and are every component data number.Server by the some operators to used carries out unified management, in the time having data storage requirement, can select the server in management, therefrom selects some servers and stores divided data.
Data upload module 20 is by extremely corresponding the multicomponent data upload of processing server.The tables of data of updating device after upload procedure, the path of simultaneously every a divided data being preserved is kept under the virtual directory of device.
The cloud storage device proposing in the embodiment of the present invention, in the time of uploading data, by complete user data is split as to some parts, be stored in respectively different service providers, can guarantee that so single service provider cannot obtain user's private data, even when server is attacked, can not cause user profile to be revealed yet.In addition, by the integration of cloud storage resources that multiple cloud storage service provider is provided, make user can with memory space can be able to dynamic expansion easily.
With reference to Fig. 5, Fig. 5 is the structural representation of cloud storage device the second embodiment of the present invention.
A kind of cloud storage device that second embodiment of the invention proposes, on the basis of a upper embodiment, also comprises:
Upload initialization module 30, for server being carried out to authorization identifying to judge that whether server is as validated user; If so, the information of server is saved in to tables of data.
Before divided data is uploaded onto the server, upload initialization module 30 and first server is carried out to authorization identifying, judge whether server is validated user, in the time judging that server is validated user, preserve information the updated data table of server.If validated user, the information of just preserving Cloud Server in user data table, comprises the information such as performance, capacity, bandwidth, expense, and in the time of server update, server list is also upgraded thereupon.In the time judging this server not for validated user, continue next carrier server to carry out authorization identifying, until all servers are all authenticated complete.
By uploading initialization module 30 processes, server is carried out to authorization identifying, further strengthened the fail safe of this cloud storage device.
With reference to Fig. 6, Fig. 6 is the structural representation of cloud storage device the 3rd embodiment of the present invention.
A kind of cloud storage device that third embodiment of the invention proposes, on the basis of a upper embodiment, also comprises:
Encrypting module 40, for judging whether divided data needs to encrypt; If so, divided data is encrypted.
Determine according to the performance of device whether divided data encrypts.If the performance of cloud storage device is enough supported the operation of encrypting, encrypting module 40 transmits divided data after can selecting divided data to be encrypted again, can further protect like this to user profile.If select not encrypt, directly transmit divided data, can reduce like this load of device, reduce energy consumption.Certainly, in order to strengthen fail safe, in the situation that device performance is enough supported, transmission after preferably selecting to encrypt.Which kind of, as for selecting encryption method, can freely expand.
In the above-described embodiments, cloud storage device can be arranged on server or in terminal.
In the time that cloud storage device is arranged in terminal, terminal is that the divided data after grouping is selected different servers, then different divided data is stored in different servers.When download, terminal, again according to tables of data, is downloaded needed divided data, and is reverted to metadata from different servers.
In the time that cloud storage device is arranged on server, can divide into groups to data by this server, initial data is divided into multicomponent data, then, this server is selected in several servers again and is uploaded multicomponent data, and this grouping service uploads to multicomponent data respectively in multiple servers and stores.
The present invention also proposes a kind of cloud storage data download method.
With reference to Fig. 7, Fig. 7 is the structural representation of cloud storage data download method of the present invention the first embodiment.
In the present embodiment, cloud storage data download method comprises:
Step S50 to storing the address information of the respective server of divided data in the download request retrieve data table of divided data, downloads divided data according to user from respective server;
First confirm to need after which divided data according to user, retrieve data table, the information of preserving according to tables of data, finds the address information of the respective server of storing divided data in tables of data and downloads divided data from server.
Step S60, reverts to metadata by divided data.
Downloaded after all divided data, reverted to complete metadata, then, data downloading process finishes.
The cloud storage data download method proposing in the embodiment of the present invention, in the time of uploading data, by complete user data is split as to some parts, be stored in respectively different service providers, when download, then from different servers, download divided data and revert to metadata.Can guarantee that so single service provider cannot obtain user's private data, even when server is attacked, also can not cause user profile to be revealed.
With reference to Fig. 8, Fig. 8 is the structural representation of cloud storage data download method of the present invention the second embodiment.
Cloud storage data download method the second embodiment that the present embodiment proposes, different from above-described embodiment, the method that this enforcement proposes also comprised before step S50:
Step S70, carries out authorization identifying to judge that whether server is as validated user to server;
If so, perform step S71; If not, get back to step S60.
The information of described server is saved in tables of data by step S71.
From server, before downloading data, first server is carried out to authorization identifying, judge whether server is validated user.In the time judging that server is validated user, preserve information the updated data table of server, simultaneously, also in user's tables of data, preserve the information of Cloud Server, comprise the information such as performance, capacity, bandwidth, expense, in the time of server update, server list is also upgraded thereupon.In the time judging server not for validated user, continue next carrier server to carry out authorization identifying, until all servers are all authenticated complete.
By before download divided data, server being carried out to authorization identifying, in the time that the information of server is modified, the server being modified can be identified, thereby make the data of download safer, reliable.
With reference to Fig. 9, Fig. 9 is the structural representation of cloud storage data download method of the present invention the 3rd embodiment.
The present embodiment proposes cloud storage data download method the 3rd embodiment, and different from above-described embodiment, the method that this enforcement proposes also comprises between step S50 and step S60:
Step S80, the encryption identification position of the divided data of preserving according to tables of data, judges whether divided data is the divided data of encrypting;
If so, perform step S81; If not, perform step S60.
Step S81, is decrypted divided data.
The encryption method that the present embodiment proposes a kind of divided data while uploading: choose at random the divided data that is numbered m as key, this divided data and other all divided data are carried out after xor operation with it, then upload, and numbering m divided data does not operate.Corresponding decryption method while downloading divided data is: by the divided data of all encryptions be numbered m divided data xor operation again, thereby decode raw score certificate.
The present invention further proposes a kind of cloud storage data download apparatus.
With reference to Figure 10, Figure 10 is the structural representation of cloud storage data download apparatus of the present invention the first embodiment.In the present embodiment, a kind of cloud storage data download apparatus comprises:
The cloud storage data download method proposing in the embodiment of the present invention, in the time of uploading data, by complete user data is split as to some parts, be stored in respectively different service providers, when download, then from different servers, download divided data and revert to metadata.Can guarantee that so single service provider cannot obtain user's private data, even when server is attacked, also can not cause user profile to be revealed.
With reference to Figure 11, Figure 11 is the structural representation of cloud storage data download apparatus of the present invention the second embodiment.
Cloud storage data download apparatus the second embodiment proposing in the present embodiment, different from above-described embodiment, this cloud storage data download apparatus also comprises:
Download initializes module 70, for carrying out authorization identifying to judge that whether described server is as validated user to described server; If so, the information of described server is saved in to tables of data.
Before downloading data, download initializes module 70 is first carried out authorization identifying to server, judge whether server is validated user, in the time judging that server is validated user, preserve information the updated data table of server, simultaneously, also in user's tables of data, preserve the information of Cloud Server, comprise the information such as performance, capacity, bandwidth, expense, in the time of server update, server list is also upgraded thereupon.In the time judging server not for validated user, continue next carrier server to carry out authorization identifying, until all servers are all authenticated complete.
Before downloading divided data, server is carried out to authorization identifying by download initializes module 70, make when having stored the information of server of divided data while being modified, initialization module 70 can identify the server being modified, thereby safer while making downloading data, reliable.
With reference to Figure 12, Figure 12 is the structural representation of cloud storage data download apparatus of the present invention the 3rd embodiment.
The cloud storage data download apparatus proposing in the present embodiment, different from above-described embodiment, this cloud storage data download apparatus also comprises:
Deciphering module 80, for judging whether described divided data is the divided data of encrypting; If so, described divided data is decrypted.
Particularly, the decryption method in deciphering module 80 is corresponding with the encryption method of encrypting module, when encryption method is: by the divided data of all encryptions be numbered the divided data xor operation again of m, thereby decode raw score certificate.The present embodiment proposes a kind of encryption method: choose at random the divided data that is numbered m as key, this divided data and other all divided data are carried out, after xor operation, just uploading, and the divided data that is numbered m does not operate.Now, corresponding decryption method is: the divided data of all encryptions be numbered the divided data xor operation again of m, thereby decode raw score certificate.
The foregoing is only the preferred embodiments of the present invention; not thereby limit the scope of the claims of the present invention; every equivalent structure transformation that utilizes specification of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (13)
1. a cloud storage means, is characterized in that, comprising:
Receive after data storage request, the data that will upload are divided into multicomponent data, and distribute different servers for it;
By described multicomponent data upload to corresponding server, and after uploading successfully mapping relations between every component data and server in updated data table.
2. the method for claim 1, is characterized in that, described by multicomponent data upload to corresponding server, and in updated data table, before the mapping relations between every component data and server, also comprise after uploading successfully:
Described server is carried out to authorization identifying to judge that whether described server is as validated user;
If so, the information of described server is saved in to tables of data.
3. method as claimed in claim 2, is characterized in that, described in upload the described divided data of many groups and organize at the most described server and before updated data table, also comprise simultaneously:
Judge whether described divided data needs to encrypt;
If so, described divided data is encrypted.
4. a cloud storage device, is characterized in that, comprising:
Packet module, is divided into multicomponent data for the data that will upload, and selects the corresponding server of many groups corresponding with it according to virtual directory;
Data upload module, organizes described server updated data table simultaneously at the most for uploading the described divided data of many groups;
5. device as claimed in claim 4, is characterized in that, also comprises:
Upload initialization module, for described server being carried out to authorization identifying to judge that whether described server is as validated user; If so, the information of described server is saved in to tables of data.
6. device as claimed in claim 5, is characterized in that, also comprises:
Encrypting module, for judging whether described divided data needs to encrypt; If so, described divided data is encrypted.
7. the device as described in any one in claim 4-6, is characterized in that, described cloud storage device is arranged on server or in terminal.
8. a cloud storage data download method, is characterized in that, comprising:
To storing the address information of the respective server of divided data in the download request retrieve data table of divided data, from respective server, download divided data according to user;
Divided data is reverted to metadata.
9. method as claimed in claim 8, is characterized in that, described according to user to storing the address information of the respective server of divided data in the download request retrieve data table of divided data, from respective server, download before divided data and also comprise:
Described server is carried out to authorization identifying to judge that whether described server is as validated user;
If so, the information of described server is saved in to tables of data.
10. method as claimed in claim 9, is characterized in that, described divided data is reverted to before metadata and also comprised:
The encryption identification position of the divided data of preserving according to tables of data, judges whether described divided data is the divided data of encrypting;
If so, described divided data is decrypted.
11. 1 kinds of cloud storage data download apparatus, is characterized in that, comprising:
Data download module for according to user, the download request retrieve data table of divided data being stored the address information of the respective server of divided data, is downloaded divided data from respective server;
Data restoring module, for reverting to metadata by divided data.
12. devices as claimed in claim 11, is characterized in that, also comprise:
Download initializes module, for carrying out authorization identifying to judge that whether described server is as validated user to described server; If so, the information of described server is saved in to tables of data.
13. devices as described in claim 11 or 12, is characterized in that, also comprise:
Deciphering module, for judging whether described divided data is the divided data of encrypting; If so, described divided data is decrypted.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210499475.0A CN103856499A (en) | 2012-11-29 | 2012-11-29 | Cloud storage method, cloud storage device, cloud storage data downloading method and cloud storage data downloading device |
| PCT/CN2013/083219 WO2014082476A1 (en) | 2012-11-29 | 2013-09-10 | Cloud storage method and apparatus, and cloud storage data downloading method and apparatus |
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| CN201210499475.0A CN103856499A (en) | 2012-11-29 | 2012-11-29 | Cloud storage method, cloud storage device, cloud storage data downloading method and cloud storage data downloading device |
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| CN103856499A true CN103856499A (en) | 2014-06-11 |
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| CN108875384A (en) * | 2018-06-06 | 2018-11-23 | 国云科技股份有限公司 | A kind of business risk data safety emerging system and its implementation |
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