CN104468627B - A kind of data ciphering method and system carrying out terminal data backup by server - Google Patents
A kind of data ciphering method and system carrying out terminal data backup by server Download PDFInfo
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- CN104468627B CN104468627B CN201410839275.4A CN201410839275A CN104468627B CN 104468627 B CN104468627 B CN 104468627B CN 201410839275 A CN201410839275 A CN 201410839275A CN 104468627 B CN104468627 B CN 104468627B
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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
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
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- General Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
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- Storage Device Security (AREA)
- Information Retrieval, Db Structures And Fs Structures Therefor (AREA)
Abstract
The invention discloses a kind of data ciphering methods carrying out terminal data backup by server, Step 1: back-up terminals initiate backup request, the public key of itself is sent to back-up terminals by server；Step 2: back-up terminals generate working key, Backup Data is encrypted with the working key, forms backup ciphertext；Step 3: working key is encrypted in the public key using server, the ciphertext of working key is formed, the ciphertext of backup ciphertext and working key is sent jointly into server storage；It initiates recovery request Step 4: restoring terminal and the public key for restoring terminal is sent to server, the ciphertext of server decryption work key, then the public key encryption working key with recovery terminal；Step 5: the ciphertext of backup ciphertext and working key is sent jointly to restore terminal；Step 6: restoring the ciphertext that terminal uses the private key decryption work key of itself, working key is obtained, then backup ciphertext is decrypted using working key, obtain the plaintext of Backup Data.
Description
Technical field
The present invention relates to technical field of data backup more particularly to a kind of numbers carrying out terminal data backup by server
According to encryption method and system.
Background technology
Information-based terminals various at present are just obtaining increasingly extensive application.For a user, have maximum value be
Generated data during various information terminal are used, therefore number of users is generally each provided in various information terminal
According to backup/restoration function.At present user generally possess a plurality of types of data backups such as computer, mobile phone, tablet computer/
Restore terminal, and the replacement frequency of these terminal devices is just higher and higher.Simultaneously each equipment there is also damage, lose the problem of,
Especially mobile device, there are higher risk of missing.Therefore user needs between multiple and different terminal devices into line number
According to seamless backup and recovery, while the requirements such as the secret protection to meet user need to be encrypted in Backup Data.Consider
To the diversity of the held equipment of user, and also to ensure the reliability of Backup Data, current terminal data backup work(
Data are stored to server end, terminal when can use backup mostly and obtain former backup from server end when needing to restore
The mode of data quickly and easily carries out the migration of data to realize user between distinct device, while terminal can also be damaged,
Loss when loss minimizes.
It is above-mentioned data backup processing is carried out based on server during, for the protection to user data privacy,
It generally is both needed to that data are encrypted, to ensure that the terminal data of backup can not be illegally accessed.Current Backup Data
Encryption mainly comprises the following steps：Terminal randomly generates working key, is encrypted with the key pair Backup Data, with the public affairs of terminal
Key protects working key.The encrypted backup data formed after above-mentioned steps are handled are uploaded to server end and are stored.
The ciphertext Backup Data that terminal-pair is obtained from server end when needing to restore is decrypted, and mainly comprises the following steps：With the private key of terminal
Decryption obtains working key, obtains Backup Data with work secret key decryption in plain text.
Can be seen that the premise that Backup Data can normally restore from above-mentioned Backup Data encryption and decryption processing procedure is to need
Public key used corresponding private key when correctly holding Backup Data encryption：That is the private key of terminal.According to relevant requirement, each terminal
Private key be only capable of being present in terminal inner, can not be exported.Therefore when there is equipment damage, loss, due to can not
The terminal secret key needed for decryption is obtained, " can see cannot use " to Backup Data is caused, even if user possesses former Backup Data, still
Required data cannot normally be restored, fail the final purpose for reaching data backup.
Invention content
It cannot normally restore required in terminal device damage, loss for terminal data backup method in the prior art
The technical issues of data, the invention discloses a kind of data ciphering methods carrying out terminal data backup by server.This hair
It is bright to also disclose a kind of data encryption system carrying out terminal data backup by server.
The purpose of the present invention is realized by following technical proposals：
A kind of data ciphering method carrying out terminal data backup by server, specifically includes following step：
Step 1: back-up terminals initiate backup request to server, the public key of itself is sent to back-up terminals by server；
Step 2: back-up terminals generate working key, Backup Data is encrypted with the working key, it is close to form backup
Text；
Step 3: using step 1 obtain to the public key of server working key is encrypted, it is close to form work
The ciphertext of backup ciphertext and working key is sent jointly to server storage by the ciphertext of key, back-up terminals；
It initiates recovery request Step 4: restoring terminal to server and the public key for restoring terminal is sent to server, take
The ciphertext of the business device private key decryption work key of itself obtains working key, then close with the public key encryption work for restoring terminal
Key；
Step 5: the ciphertext that server is obtained by backup ciphertext and using the public key encryption working key for restoring terminal is together
It is sent to recovery terminal；
Step 6: restoring the ciphertext that terminal uses the private key decryption work key of itself, working key is obtained, then use work
Make secret key decryption backup ciphertext, obtains the plaintext of Backup Data.
Further, above-mentioned back-up terminals and recovery terminal belong to different terminal devices.To solve terminal damage
The technical issues of bad or loss.
Further, above-mentioned back-up terminals and recovery terminal belong to the same terminal device.The method of the present invention is supported
Back-up terminals restore the conventional usage scenario requirement that terminal is same equipment, convenient for users to use.
Further, the above method further includes, after back-up terminals initiate backup request, server and back-up terminals it
Between carry out authentication.Ensure the safety of data by authentication.
Further, the above method further includes, after restoring terminal and initiating recovery request, server with restore terminal it
Between carry out authentication.Ensure the safety of data by authentication.
Further, the above method further includes that after the completion of backup, server returns to backup result to back-up terminals；
After the completion of recovery, restores terminal to server and return to restoration result.
Further, above-mentioned working key is random number.
The invention also discloses a kind of data encryption systems carrying out terminal data backup by server, specifically include
Back-up terminals, server and restore terminal, the back-up terminals to server initiate backup request, the server by itself
Public key is sent to back-up terminals；Back-up terminals generate working key, and Backup Data is encrypted with the working key, are formed standby
Part ciphertext；Back-up terminals also use the public key of server that working key is encrypted simultaneously, form the ciphertext of working key, standby
The ciphertext of backup ciphertext and working key is sent jointly to server storage by part terminal；The recovery terminal to server is initiated
The public key for restoring terminal is simultaneously sent to server by recovery request, the ciphertext of the server private key decryption work key of itself,
Obtain working key, then the public key encryption working key with recovery terminal；Server is by backup ciphertext and using recovery terminal
The ciphertext that public key encryption working key obtains sends jointly to restore terminal；It is close using the private key decryption work of itself to restore terminal
The ciphertext of key obtains working key, then decrypts backup ciphertext using working key, obtains the plaintext of Backup Data.
By using above technical solution, the present invention has advantageous effect below：Data encryption proposed by the present invention
Method solves the problems, such as that can not be normally carried out data when backup caused by conventional encryption methods and inconsistent recovery terminal restores,
The corresponding association eliminated between backup and recovery terminal requires, and it is various can fully to meet the terminal possessed in active user
The security guarantee demand of Backup Data under a variety of usage scenarios such as change, terminal update frequentization, lost terminal occurred frequentlyization.
Only when data are restored, server-side need to be carried out to working key for relatively traditional Backup Data encryption method
Translation and protection processing, the data volume of working key is minimum, and the increased operand of institute is also extremely limited.To as the standby of data subject
It is consistent with traditional process that part data such as are not necessarily to the decryption repeated, re-encrypt at operations, the data encrypting and deciphering process.
The above-mentioned increased operand of institute is all undertaken by server-side simultaneously, and the operand of each terminal device does not change, no
The resource consumption to each terminal can be increased, any additional influence will not be caused to the use of terminal device.
Description of the drawings
Fig. 1 is the backup flow chart of Backup Data.
Fig. 2 is the recovery flow chart of Backup Data.
Specific implementation mode
The specific implementation mode that the present invention will be described in detail with reference to the accompanying drawings of the specification.
The invention discloses it is a kind of by server carry out terminal data backup data ciphering method, specifically include with
Under step：
Step 1: back-up terminals initiate backup request to server, the public key of itself is sent to back-up terminals by server；
Step 2: back-up terminals generate working key, Backup Data is encrypted with the working key, it is close to form backup
Text；
Step 3: using step 1 obtain to the public key of server working key is encrypted, it is close to form work
The ciphertext of backup ciphertext and working key is sent jointly to server storage by the ciphertext of key, back-up terminals；
It initiates recovery request Step 4: restoring terminal to server and the public key for restoring terminal is sent to server, take
The ciphertext of the business device private key decryption work key of itself obtains working key, then close with the public key encryption work for restoring terminal
Key；
Step 5: the ciphertext that server is obtained by backup ciphertext and using the public key encryption working key for restoring terminal is together
It is sent to recovery terminal；
Step 6: restoring the ciphertext that terminal uses the private key decryption work key of itself, working key is obtained, then use work
Make secret key decryption backup ciphertext, obtains the plaintext of Backup Data.
Data ciphering method proposed by the present invention solves backup caused by conventional encryption methods and recovery terminal is inconsistent
Shi Wufa is normally carried out the problem of data are restored, and the corresponding association eliminated between backup and recovery terminal requires, and can fill
Divide a variety of usage scenarios such as terminal diversification, terminal update frequentization, lost terminal occurred frequentlyization for meeting and possessing in active user
The security guarantee demand of lower Backup Data.
Only when data are restored, server-side need to be carried out to working key for relatively traditional Backup Data encryption method
Translation and protection processing, the data volume of working key is minimum, and the increased operand of institute is also extremely limited.To as the standby of data subject
It is consistent with traditional process that part data such as are not necessarily to the decryption repeated, re-encrypt at operations, the data encrypting and deciphering process.
The above-mentioned increased operand of institute is all undertaken by server-side simultaneously, and the operand of each terminal device does not change, no
The resource consumption to each terminal can be increased, any additional influence will not be caused to the use of terminal device.
Further, above-mentioned back-up terminals and recovery terminal belong to different terminal devices.To solve terminal damage
The technical issues of bad or loss.
Further, above-mentioned back-up terminals and recovery terminal belong to the same terminal device.The method of the present invention is supported
Back-up terminals restore the conventional usage scenario requirement that terminal is same equipment, convenient for users to use.
Further, the above method further includes, after back-up terminals initiate backup request, server and back-up terminals it
Between carry out authentication.Ensure the safety of data by authentication.
Further, the above method further includes, after restoring terminal and initiating recovery request, server with restore terminal it
Between carry out authentication.Ensure the safety of data by authentication.
Further, the above method further includes that after the completion of backup, server returns to backup result to back-up terminals；
After the completion of recovery, restores terminal to server and return to restoration result.
Further, above-mentioned working key is random number.
The invention also discloses a kind of data encryption systems carrying out terminal data backup by server, specifically include
Back-up terminals, server and restore terminal, the back-up terminals to server initiate backup request, the server by itself
Public key is sent to back-up terminals；Back-up terminals generate working key, and Backup Data is encrypted with the working key, are formed standby
Part ciphertext；Back-up terminals also use the public key of server that working key is encrypted simultaneously, form the ciphertext of working key, standby
The ciphertext of backup ciphertext and working key is sent jointly to server storage by part terminal；The recovery terminal to server is initiated
The public key for restoring terminal is simultaneously sent to server by recovery request, the ciphertext of the server private key decryption work key of itself,
Obtain working key, then the public key encryption working key with recovery terminal；Server is by backup ciphertext and using recovery terminal
The ciphertext that public key encryption working key obtains sends jointly to restore terminal；It is close using the private key decryption work of itself to restore terminal
The ciphertext of key obtains working key, then decrypts backup ciphertext using working key, obtains the plaintext of Backup Data.
In above system, public key is sent to back-up terminals by server, is carried out to working key using the public key of server
Then encryption uses the private key of server to decrypt working key, to obtain working key on the server, and in server
The upper public key with recovery terminal is sent to the working key encryption and restores terminal for decrypting Backup Data.It is such
System so that also can recover Backup Data by restoring terminal in the case where back-up terminals are lost or are damaged, it is ensured that
Effective recovery of Backup Data.
Fig. 1 is the backup flow chart of Backup Data, is as follows：
(1) terminal needs to initiate backup request to server-side when Backup Data, and back-up terminals carry out identity with server-side and recognize
Card；
(2) certification generates random number R 1 by rear back-up terminals, and R1 is used to be carried out as working key to Backup Data Data
Encryption forms ER1(Data)；
(3) back-up terminals obtain the public key PK1 of server-side from authentication information, and R1 is encrypted, and are formed
EPK1(R1)；
(4) back-up terminals are by the ciphertext data E of above-mentioned generationR1(Data) and EPK1(R1) it is sent to server-side together；
(5) server-side stores the Backup Data received；
(6) server-side returns to backup operation result.
Fig. 2 is the recovery flow chart of Backup Data, is as follows：
（1）When terminal needs to restore data, recovery request is initiated to server-side, restores terminal and recognizes with server-side progress identity
Card；
（2）Certification decrypts E by rear server-side own private key SK1PK1(R1) R1 is obtained；
（3）Server-side is obtained from authentication information restores terminal public key PK2, is encrypted to R1, forms EPK2
(R1)；
（4）Server-side is by the ciphertext data E of above-mentioned generationR1(Data) and EPK2(R1) it is sent to recovery terminal together；
（5）Restore terminal and decrypts E with own private key SK2PK2(R1), R1 is obtained；
（6）Restore terminal and decrypts E with R1R1(Data), Data is obtained in plain text；
（7）Restore terminal to restore Data clear datas into terminal, and recovery operation result is returned to server-side.
Can be seen that from the process of above-mentioned backup, recovery, data ciphering method proposed by the present invention realize back-up terminals with
Restore the loose coupling between terminal, woth no need to ask back-up terminals to be necessary for same equipment with terminal is restored, can fully meet current
User's unconventional use demand such as changes terminal, terminal damage, lost terminal in data backup restoration operation, together
When this method also support back-up terminals, restore terminal be same equipment conventional usage scenario requirement.Therefore the data encryption side
Method has the full compatibility of user data backup/restoration scenario.
The coefficient and parameter gone out given in the above embodiments is available to those skilled in the art to realize or use
The present invention's, the present invention, which does not limit, only takes aforementioned disclosed numerical value, without departing from the present invention in the case of the inventive idea, this
The technical staff in field can make above-described embodiment various modifications or adjustment, thus protection scope of the present invention is not upper
It states embodiment to be limited, and should be the maximum magnitude for meeting the inventive features that claims are mentioned.
Claims (6)
1. a kind of data ciphering method carrying out terminal data backup by server, specifically includes following step：
Step 1: back-up terminals initiate backup request to server, the public key of itself is sent to back-up terminals by server；
Step 2: back-up terminals generate working key, Backup Data is encrypted with the working key, forms backup ciphertext；
Step 3: using step 1 obtain to the public key of server working key is encrypted, form working key
The ciphertext of backup ciphertext and working key is sent jointly to server storage by ciphertext, back-up terminals；
It initiates recovery request Step 4: restoring terminal to server and the public key for restoring terminal is sent to server, server
With the ciphertext of the private key decryption work key of itself, working key, then the public key encryption working key with recovery terminal are obtained；
Step 5: server sends backup ciphertext and the ciphertext obtained using the public key encryption working key for restoring terminal together
Give recovery terminal；
Step 6: restoring the ciphertext that terminal uses the private key decryption work key of itself, working key is obtained, then close using work
Key decrypts backup ciphertext, obtains the plaintext of Backup Data,
The back-up terminals and recovery terminal belong to different terminal devices.
2. the data ciphering method of terminal data backup is carried out by server as described in claim 1, it is characterised in that institute
The method of stating further includes that after back-up terminals initiate backup request, authentication is carried out between server and back-up terminals.
3. the data ciphering method of terminal data backup is carried out by server as claimed in claim 2, it is characterised in that institute
The method of stating further includes that after restoring terminal initiation recovery request, authentication is carried out between server and recovery terminal.
4. the data ciphering method of terminal data backup is carried out by server as claimed in claim 3, it is characterised in that institute
The method of stating further includes, and after the completion of backup, server returns to backup result to back-up terminals；After the completion of recovery, restore terminal
Restoration result is returned to server.
5. the data ciphering method of terminal data backup is carried out by server as claimed in claim 3, it is characterised in that institute
It is random number to state working key.
6. a kind of data encryption system carrying out terminal data backup by server, it is characterised in that specifically include backup eventually
End, server and recovery terminal, the back-up terminals initiate backup request to server, and the server sends out the public key of itself
Give back-up terminals；Back-up terminals generate working key, and Backup Data is encrypted with the working key, and it is close to form backup
Text；Back-up terminals also use the public key of server that working key is encrypted simultaneously, form the ciphertext of working key, backup is eventually
The ciphertext of backup ciphertext and working key is sent jointly to server storage by end；The recovery terminal to server initiates to restore
It asks and the public key for restoring terminal is sent to server, the server ciphertext of the private key decryption work key of itself obtains
Working key, then the public key encryption working key with recovery terminal；Server is by backup ciphertext and using the public key for restoring terminal
The ciphertext that cryptographic work key obtains sends jointly to restore terminal；Restore terminal using the private key decryption work key of itself
Ciphertext obtains working key, then decrypts backup ciphertext using working key, the plaintext of Backup Data is obtained, wherein the backup
Terminal and recovery terminal belong to different terminal devices.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410839275.4A CN104468627B (en) | 2014-12-30 | 2014-12-30 | A kind of data ciphering method and system carrying out terminal data backup by server |
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| CN201410839275.4A CN104468627B (en) | 2014-12-30 | 2014-12-30 | A kind of data ciphering method and system carrying out terminal data backup by server |
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| CN104468627B true CN104468627B (en) | 2018-09-04 |
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| CN105204962B (en) * | 2015-09-25 | 2019-04-12 | 北京金山安全软件有限公司 | Data backup method and device and server |
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| CN107295069B (en) * | 2017-05-27 | 2020-06-02 | Oppo广东移动通信有限公司 | Data backup method and device, storage medium and server |
| CN107920052B (en) * | 2017-08-02 | 2020-11-17 | 唐盛（北京）物联技术有限公司 | Encryption method and intelligent device |
| CN107590025A (en) * | 2017-08-17 | 2018-01-16 | 深圳市优品壹电子有限公司 | A kind of back-up restoring method and system |
| CN108595291B (en) * | 2018-04-01 | 2021-08-31 | 山东协和学院 | Medical data backup system |
| CN109684129B (en) * | 2018-11-20 | 2020-05-05 | 北京深思数盾科技股份有限公司 | Data backup recovery method, storage medium, encryption machine, client and server |
| CN109934013B (en) * | 2019-03-21 | 2021-01-08 | 北京纬百科技有限公司 | Data protection method and device |
| CN111061596B (en) * | 2019-12-26 | 2021-11-16 | 航天壹进制(南京)数据科技有限公司 | Data backup and recovery method and system based on digital certificate |
| CN111130778B (en) * | 2019-12-31 | 2022-03-11 | 郑州信大捷安信息技术股份有限公司 | Method and system for safely recovering encrypted data based on hardware |
| CN113076546B (en) * | 2021-03-02 | 2024-03-05 | Oppo广东移动通信有限公司 | Information processing method, equipment and storage medium |
| CN113064761B (en) * | 2021-04-08 | 2022-03-04 | 北京深思数盾科技股份有限公司 | Data recovery method, server, encryption device, terminal and medium |
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