CN104661201A - Method, device and system for short message backup, and mobile terminal - Google Patents
Method, device and system for short message backup, and mobile terminal Download PDFInfo
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- CN104661201A CN104661201A CN201310586735.2A CN201310586735A CN104661201A CN 104661201 A CN104661201 A CN 104661201A CN 201310586735 A CN201310586735 A CN 201310586735A CN 104661201 A CN104661201 A CN 104661201A
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Abstract
The invention provides a method, a device and a system for short message backup, and a mobile terminal, applying to the technical field of information safety. The method comprises the steps of generating a secret key pair comprising a public key and a private key; encrypting a plaintext short message by the public key and generating a ciphertext; sending the ciphertext to a cloud server; downloading the ciphertext from the cloud server to local when the plaintext short message is needed again; and decrypting the ciphertext by the private key to obtain the plaintext short message. In the whole backup process of the short message, the short message is transmitted in a ciphertext form when the mobile terminal and the cloud server interact, so that the plaintext short message is prevented from being acquired by a thief in transmission of the short message; furthermore, the short message is stored in the cloud server in the ciphertext form, so that even if the cloud server leaks the information, the thief cannot easily acquire the plaintext short message without the private key necessary for short message decoding, and the short message and privacy of a user are protected.
Description
Technical field
The invention belongs to field of information security technology, particularly relate to a kind of backup method of note, device, system and mobile terminal.
Background technology
Along with the development of cloud memory technology, mobile phone users by the short message backup that receives to cloud server, when needs regain these notes, then can download these notes to this locality from cloud server.This short message backup function is very easy to the management of user to note, can prevent from because of the loss of mobile terminal, note being lost.
Cloud server can be a server zone, also can be a station server.The high in the clouds treatment technology of current trend is exactly utilize distributed server to process the data of user, nearest server can be selected to process the data of user according to the position of user, greatly improve speed and the efficiency of deal with data.
But at present, beyond the clouds during server backup note, the note on cloud server is all that plaintext version is sent to high in the clouds memory, is easy to be intercepted and captured by miscellaneous equipment, very easily produces potential safety hazard; In addition, note is stored in cloud server with plaintext version, if the information leakage of cloud server, stealer can obtain the short message of user, the short message of user may be utilized to exercise the behaviors such as swindle, threaten the safety of user.
Summary of the invention
Embodiments provide a kind of backup method of note, device, system and mobile terminal, be intended to solve prior art when message backup, the problem of potential safety hazard can be produced.
On the one hand, provide a kind of backup method of note, described method comprises:
Generate the double secret key comprising PKI and private key;
With described PKI, plaintext note is encrypted, generating ciphertext;
Send described ciphertext to cloud server;
When needs regain described plaintext note, download described ciphertext to this locality from cloud server;
With described private key, described ciphertext is decrypted, obtains described plaintext note.
Further, described PKI and described private key are two different keys.
On the other hand, provide a kind of back-up device of note, described device comprises:
Double secret key generation unit, for generating the double secret key comprising PKI and private key;
Ciphering unit, for being encrypted plaintext note with described PKI, generating ciphertext;
Ciphertext transmitting element, for sending described ciphertext to cloud server;
Ciphertext download unit, during for regaining described plaintext note when needs, downloads described ciphertext to this locality from cloud server;
Decryption unit, for being decrypted described ciphertext with described private key, obtains described plaintext note.
Further, described PKI and described private key are two different keys.
Again on the one hand, provide a kind of mobile terminal, it is characterized in that, described mobile terminal comprises the back-up device of note as above.
Another aspect, provides a kind of standby system of note, and described system comprises cloud server, also comprises the mobile terminal as above be connected with described cloud server.
In the embodiment of the present invention, before user uploads note to cloud server, first using public-key is encrypted note, is uploaded to cloud server again after generating ciphertext; When user needs to regain short message, first download ciphertext from cloud server, then the short message that this ciphertext of deciphering acquisition comprises.In the backup procedure of whole note, one be mobile terminal and cloud server mutual time, note adopts ciphertext form transmission, prevents stolen taker in transmitting procedure from getting expressly note; Two is that server preserves short message with ciphertext form beyond the clouds; even if due to the information leakage of cloud server; because stealer does not carry out necessary private key when note is deciphered; expressly note can not be obtained easily; thus protect the short message of user safely, protect the privacy information of user.
Accompanying drawing explanation
Fig. 1 is the realization flow figure of the backup method of the note that the embodiment of the present invention one provides;
Fig. 2 is the structured flowchart of the back-up device of the note that the embodiment of the present invention two provides;
Fig. 3 is the structured flowchart of the standby system of the note that the embodiment of the present invention three provides.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
In embodiments of the present invention, before user uploads note to cloud server, first using public-key is encrypted note, is uploaded to cloud server again after generating ciphertext; When user needs to regain short message, first download ciphertext from cloud server, then the short message that this ciphertext of deciphering acquisition comprises.
Below in conjunction with specific embodiment, realization of the present invention is described in detail:
Embodiment one
Fig. 1 shows the realization flow of the backup method of the note that the embodiment of the present invention one provides, and is described for mobile terminal side, and details are as follows:
In step S101, generate the double secret key comprising PKI and private key.
At present, encryption technology has symmetric cryptosystem and asymmetric encryption techniques, asymmetric encryption techniques is for symmetric cryptosystem, symmetric cryptosystem is that encryption and decryption use same key, and asymmetric encryption techniques encryption is that employing double secret key carries out encryption and decryption to information.Double secret key comprises PKI and private key, and PKI and private key are two different keys, uses these two different cipher key pair information to encrypt and decrypt.Private key is the key only having its owner to know, and PKI is the key that other entity in network also can be known and use, these two key differences, but functionally complementary.
In the present embodiment, before the plaintext note stored this locality is encrypted, Mr. mobile terminal double secret key in a pair, this cipher key pair comprises a PKI and corresponding with this PKI private key, wherein, expressly note refers to not through the note of encryption.
Owing to being adopt rivest, shamir, adelman to be encrypted the plaintext note that mobile terminal this locality stores in the present embodiment, so the PKI of cipher key pair and private key are two not identical keys.
Utilize PKI can be encrypted plaintext note, generating ciphertext, utilize private key can be decrypted this ciphertext, obtain expressly note.Because double secret key is generated by mobile terminal self, only has mobile terminal this double secret key owned, other equipment cannot be known, and is difficult to be cracked by other equipment, has very high fail safe so be uploaded to cloud server in ciphertext or download the process of ciphertext from cloud server.
In step s 102, with described PKI, plaintext note is encrypted, generating ciphertext.
In the present embodiment, before the note stored this locality is uploaded to cloud server, the plaintext note that this locality stores by mobile terminal is encrypted, generating ciphertext, and sends this ciphertext to cloud server.
Utilize public key encryption expressly note, other people cannot see expressly note, even if the note after other people obtain encryption also cannot read the short message of user, and such available protecting private data of user.
Due to ciphering process employing is rivest, shamir, adelman, so ciphering process is simple, efficiency is high, and ciphertext cracks difficulty.
In step s 103, described ciphertext is sent to cloud server.
In the present embodiment, after being encrypted generating ciphertext to plaintext note, mobile terminal uploads ciphertext to cloud server.
Due in ciphertext upload procedure, short message is preserved in the ciphertext generated after encryption, so have high security, even if stolen taker obtains this ciphertext, because stealer does not have private key, is also difficult to obtain easily expressly note.In addition; the short message being uploaded to cloud server is preserved with the form of ciphertext, and same stealer is difficult to obtain expressly note, can prevent due to the leakage of cloud server information and cause note to be lost; avoid stealer to obtain expressly note, effectively protect the short message of user.
In step S104, when needs regain described plaintext note, download described ciphertext to this locality from cloud server.
In the present embodiment, when mobile phone users needs to regain the plaintext note being sent to cloud server, can from cloud server download with to the ciphertext obtained after this plaintext SMS encryption to local mobile terminal, when downloading note, in transmitting procedure, short message preserves with ciphertext form, can prevent in note downloading process, stealer obtains the plaintext note that user needs, and causes information leakage.
In step S105, with described private key, described ciphertext is decrypted, obtains described plaintext note.
In the present embodiment, after user downloads ciphertext to local mobile terminal, the private key that mobile terminal utilizes oneself to generate in advance deciphers this ciphertext note, recovers and is originally stored in local plaintext note, good confidentiality, can prevent note in downloading process be stolen and cause information leakage.
The present embodiment, before user uploads note to cloud server, first using public-key is encrypted note, is uploaded to cloud server again after generating ciphertext; When user needs to regain short message, first download ciphertext from cloud server, then the short message that this ciphertext of deciphering acquisition comprises.In the backup procedure of whole note, one be mobile terminal and cloud server mutual time, note adopts ciphertext form transmission, prevents stolen taker in transmitting procedure from getting expressly note; Two is that server preserves short message with ciphertext form beyond the clouds; even if due to the information leakage of cloud server; because stealer does not carry out necessary private key when note is deciphered; expressly note can not be obtained easily; thus protect the short message of user safely, protect the privacy information of user.
In addition, it should be noted that, be described for the backup of note in the present embodiment, be not restricted to note, can a lot of information of mobile terminal this locality, such as photo be stored in, associated person information, the backup method that mail etc. is provided by the present embodiment backs up to cloud server.
One of ordinary skill in the art will appreciate that all or part of step realized in the various embodiments described above method is that the hardware that can carry out instruction relevant by program has come, corresponding program can be stored in a computer read/write memory medium, described storage medium, as ROM/RAM, disk or CD etc.
Embodiment two
Fig. 2 shows the concrete structure block diagram of the back-up device of the note that the embodiment of the present invention two provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.This device can be the unit of the software unit be built in mobile terminal, hardware cell or software and hardware combining, and this device comprises: double secret key generation unit 21, ciphering unit 22, ciphertext transmitting element 23, ciphertext download unit 24 and decryption unit 25.
Wherein, double secret key generation unit 21, for generating the double secret key comprising PKI and private key, described PKI and described private key are two different keys;
Ciphering unit 22, for being encrypted plaintext note with described PKI, generating ciphertext;
Ciphertext transmitting element 23, for sending described ciphertext to cloud server;
Ciphertext download unit 24, during for regaining described plaintext note when needs, downloads described ciphertext to this locality from cloud server;
Decryption unit 25, for being decrypted described ciphertext with described private key, obtains described plaintext note.
The device that the embodiment of the present invention provides can be applied in the embodiment of the method one of aforementioned correspondence, and details, see the description of above-described embodiment one, do not repeat them here.
Embodiment three
Fig. 3 shows the concrete structure block diagram of the standby system of the note that the embodiment of the present invention three provides, and for convenience of explanation, illustrate only the part relevant to the embodiment of the present invention.This system 3 comprises: cloud server 31 and the mobile terminal 32 be connected with this cloud server 31, the back-up device 2 of the note described in embodiment two is built-in with in this mobile terminal 32, the structure of the back-up device 2 of note refers to the description in embodiment two, does not repeat them here.Wherein, wirelessly connect between cloud server 31 and mobile terminal 32.
It should be noted that in said system embodiment, included unit is carry out dividing according to function logic, but is not limited to above-mentioned division, as long as can realize corresponding function; In addition, the concrete title of each functional unit, also just for the ease of mutual differentiation, is not limited to protection scope of the present invention.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (6)
1. a backup method for note, is characterized in that, described method comprises:
Generate the double secret key comprising PKI and private key;
With described PKI, plaintext note is encrypted, generating ciphertext;
Send described ciphertext to cloud server;
When needs regain described plaintext note, download described ciphertext to this locality from cloud server;
With described private key, described ciphertext is decrypted, obtains described plaintext note.
2. the method for claim 1, is characterized in that, described PKI and described private key are two different keys.
3. a back-up device for note, is characterized in that, described device comprises:
Double secret key generation unit, for generating the double secret key comprising PKI and private key;
Ciphering unit, for being encrypted plaintext note with described PKI, generating ciphertext;
Ciphertext transmitting element, for sending described ciphertext to cloud server;
Ciphertext download unit, during for regaining described plaintext note when needs, downloads described ciphertext to this locality from cloud server;
Decryption unit, for being decrypted described ciphertext with described private key, obtains described plaintext note.
4. device as claimed in claim 3, it is characterized in that, described PKI and described private key are two different keys.
5. a mobile terminal, is characterized in that, described mobile terminal comprises the back-up device of the note as described in claim 3 or 4.
6. a standby system for note, is characterized in that, described system comprises cloud server, also comprises the mobile terminal as claimed in claim 5 be connected with described cloud server.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586735.2A CN104661201A (en) | 2013-11-19 | 2013-11-19 | Method, device and system for short message backup, and mobile terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310586735.2A CN104661201A (en) | 2013-11-19 | 2013-11-19 | Method, device and system for short message backup, and mobile terminal |
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| CN104661201A true CN104661201A (en) | 2015-05-27 |
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| CN201310586735.2A Pending CN104661201A (en) | 2013-11-19 | 2013-11-19 | Method, device and system for short message backup, and mobile terminal |
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| CN106101153A (en) * | 2016-08-22 | 2016-11-09 | 安徽拓通信科技集团股份有限公司 | A kind of method of note cloud encrypting storing |
| CN106357678A (en) * | 2016-10-24 | 2017-01-25 | 宇龙计算机通信科技(深圳)有限公司 | Cloud encryption storage method for intelligent terminal and intelligent terminal |
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| CN103067897A (en) * | 2013-01-18 | 2013-04-24 | 浙江长天信息技术有限公司 | Asymmetrical mobile phone short message encryption method |
| CN103326860A (en) * | 2013-06-03 | 2013-09-25 | 南京理工大学常熟研究院有限公司 | Privacy secrecy system used in intelligent terminals |
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Application publication date: 20150527 |