CN104410619B - Instant communicating method and system - Google Patents
Instant communicating method and system Download PDFInfo
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- CN104410619B CN104410619B CN201410676160.8A CN201410676160A CN104410619B CN 104410619 B CN104410619 B CN 104410619B CN 201410676160 A CN201410676160 A CN 201410676160A CN 104410619 B CN104410619 B CN 104410619B
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- 238000000034 method Methods 0.000 title claims abstract description 32
- 238000012546 transfer Methods 0.000 claims abstract description 50
- 238000004891 communication Methods 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 abstract description 8
- 230000009977 dual effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/04—Real-time or near real-time messaging, e.g. instant messaging [IM]
- H04L51/046—Interoperability with other network applications or services
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L51/00—User-to-user messaging in packet-switching networks, transmitted according to store-and-forward or real-time protocols, e.g. e-mail
- H04L51/04—Real-time or near real-time messaging, e.g. instant messaging [IM]
- H04L51/043—Real-time or near real-time messaging, e.g. instant messaging [IM] using or handling presence information
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Information Transfer Between Computers (AREA)
- Computer And Data Communications (AREA)
Abstract
A kind of instant communicating method of present invention offer and system, instant communicating method of the present invention, including：Source client encodes to the file to be sent of acquisition, and the file to be sent after coding is encrypted, file to be sent after being encrypted, and send file transfer request message to server, file transfer request message is sent from server to purpose client, the file transfer request message of purpose client the reception server transmission simultaneously parses to file transfer request message, the identification information of acquisition source client, file to be sent and encryption key after encryption, and it is decrypted using the file to be sent after encryption secret key pair encryption, file to be sent after being decrypted, and the file to be sent after decryption is decoded, obtain file to be sent, so as to ensure that security of the file to be sent in transmitting procedure.
Description
Technical field
The present invention relates to communication technical field, more particularly to a kind of instant communicating method and system.
Background technology
Due to it is expansible communication and presentation protocol (Extensible Messaging and Presence Protocol,
Abbreviation XMPP) autgmentability and flexibility it is preferable, therefore, XMPP turns into the agreement that mainly uses of current instant messaging.
XMPP supports SOCKS5 byte streaming, in the prior art, typically transmits file by SOCKS5, SOCKS5 is one
Individual agency agreement, file transmission detailed process are：Source client is established with SOCKS5 proxy servers and connected, and opisthogenesis is established in connection
Client sends Agent Solicitation to proxy server, is sent when proxy server is determined to be acted on behalf of to source client
Proxy response message, source client can then send the file to proxy server, by proxy server by bytestream format
File is transmitted to purpose client, and SOCKS5 proxy servers directly transmit the byte stream of file to be sent, not to be sent
File carries out safe handling, it is thus impossible to ensure the security of file in document transmission process.
The content of the invention
The present invention provides a kind of instant communicating method and system, cannot be guaranteed text when solving and transmitting file in the prior art
In part transmitting procedure the problem of the security of file.
The first aspect of the invention provides a kind of instant communicating method, including：
Source client is encoded to the file to be sent of acquisition, and the file to be sent after coding is encrypted, and is obtained
File to be sent after must encrypting；
The source user end to server sends file transfer request message, and the file transfer request message includes described
File to be sent after the identification information of source client, the encryption and the encryption that the file to be sent is encrypted are secret
Key；
The server sends the file transfer request message to purpose client；
The purpose client receives the file transfer request message that the server is sent；
The purpose client parses to the file transfer request message, obtains the mark letter of the source client
File to be sent and the encryption key after breath, the encryption；
The purpose client is decrypted using the file to be sent after encryption described in the encryption secret key pair, is solved
File to be sent after close, and the file to be sent after the decryption is decoded, obtain the file to be sent.
In one embodiment of above-mentioned instant communicating method, the file to be sent of acquisition is carried out in the source client
Before coding, in addition to：
The source client sends connection request message to the server, and the connection request message includes source visitor
The identification information at family end；
The server receives the connection request message, and through judging to know idle thread in thread pool be present, then for
The source client distributes an idle thread, and is established and the source client by the idle thread of the server-assignment
Connection.
In one embodiment of above-mentioned instant communicating method, in addition to：
Idle thread is not present through judging to know in the server in the thread pool, then judges the line in the thread pool
Whether the number of journey reaches setting value；
If the number that the server judges to know the thread in the thread pool is not up to setting value, new line is created
Journey, and the new thread foundation and the connection of the source client for passing through establishment.
In one embodiment of above-mentioned instant communicating method, in addition to：
If the number that the server judges to know the thread in the thread pool reaches setting value, by the source client
End enters in waiting list, and the idle thread of release is judged whether by polling mode；
If the server judges to know the idle thread in the presence of release, by the idle thread of the release establish with
The connection of the source client.
In one embodiment of above-mentioned instant communicating method, if the source client judges to know current location-based service
Function has been switched on, then enables global position system GPS and positioned, and judges whether can determine in preset time by GPS
Position obtains the positional information of the source client；
If the source client judges to be informed in the position that can not obtain the source client in preset time by GPS location
Confidence ceases, then enables the positional information that mobile network obtains the source client；
The source client sends the positional information of the source client by the server to the purpose client.
The second aspect of the invention provides a kind of instantaneous communication system, including：Source client, server and purpose client
End；
The source client, for being encoded to the file to be sent of acquisition, and the file to be sent after coding is entered
Row encryption, the file to be sent after being encrypted；File transfer request message is sent to server, the file transmission request disappears
Breath includes the file to be sent after the identification information of the source client, the encryption and the file to be sent is added
Close encryption key；
The server, for sending the file transfer request message to purpose client；
The purpose client, the file transfer request message sent for receiving the server；To the text
Part transfer request message is parsed, obtain the file to be sent after the identification information of the source client, the encryption and
The encryption key；It is decrypted using the file to be sent after encryption described in the encryption secret key pair, is treated after being decrypted
File is sent, and the file to be sent after the decryption is decoded, obtains the file to be sent.
In one embodiment of above-mentioned instantaneous communication system, the source client, it is additionally operable in the source client pair
Before the file to be sent obtained is encoded, connection request message, the connection request message bag are sent to the server
Identification information containing the source client；
The server, it is additionally operable to receive the connection request message, and through judging to know idle line in thread pool be present
Journey, be then that the source client distributes an idle thread, and by the idle thread of the server-assignment establish with it is described
The connection of source client.
In one embodiment of above-mentioned instantaneous communication system, the server, it is additionally operable to through judging to know the thread
Idle thread is not present in pond, then judges whether the number of the thread in the thread pool reaches setting value；If institute is known in judgement
The number for stating the thread in thread pool is not up to setting value, then creates new thread, and by the new thread of establishment establish with
The connection of the source client.
In one embodiment of above-mentioned instantaneous communication system, the server, if being additionally operable to judge to know the thread
The number of thread in pond reaches setting value, then enters the source client in waiting list, and judged by polling mode
With the presence or absence of the idle thread of release；If judging to know the idle thread in the presence of release, pass through the idle thread of the release
Establish the connection with the source client.
In one embodiment of above-mentioned instantaneous communication system, the source client, if be additionally operable to judge know it is current
Position service function has been switched on, then enables global position system GPS and positioned, and judges whether can lead in preset time
Cross the positional information that GPS location obtains the source client；If judgement is informed in preset time and can not obtained by GPS location
The positional information of the source client, then enable the positional information that mobile network obtains the source client；Pass through the service
Device sends the positional information of the source client to the purpose client.
Instant communicating method provided by the invention and system, the file to be sent of acquisition is compiled by source client
Code, and the file to be sent after coding is encrypted, the file to be sent after being encrypted, and send file to server and pass
Defeated request message, file transfer request message is sent from server to purpose client, purpose client the reception server is sent
File transfer request message and file transfer request message is parsed, obtain source client identification information, encryption after
File to be sent and encryption key, and using encryption secret key pair encryption after file to be sent be decrypted, decrypted
File to be sent afterwards, and the file to be sent after decryption is decoded, file to be sent is obtained, it is to be sent so as to ensure that
Security of the file in transmitting procedure.
Brief description of the drawings
The flow chart for the instant communicating method that Fig. 1 is provided by the embodiment of the present invention one；
The flow chart for the instant communicating method that Fig. 2 is provided by the embodiment of the present invention two；
The structural representation for the instantaneous communication system 300 that Fig. 3 is provided by the embodiment of the present invention three.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art
The every other embodiment obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
The flow chart for the instant communicating method that Fig. 1 is provided by the embodiment of the present invention one.The method of the present embodiment is included such as
Lower step：
S110, source client are encoded to the file to be sent of acquisition, and the file to be sent after coding is added
It is close, the file to be sent after being encrypted.
File to be sent file such as can be document, picture, after source client gets file to be sent, can be obtained
The binary format byte stream of file to be sent is obtained, binary format byte stream is encoded, base64 can be used to figure
The file to be sent such as piece or file is encoded, then the file to be sent after coding is encrypted, pending after being encrypted
File is sent, encryption the file to be sent after coding can be encrypted using IDEA encryption algorithm.
S120, source user end to server send file transfer request message, and file transfer request message includes source client
File to be sent after the identification information at end, encryption and the encryption key that file to be sent is encrypted.
The identification information of source client can be username information, the physical address information of source client.
S130, server send file transfer request message to purpose client.
The file transfer request message that S140, purpose client the reception server are sent.
S150, purpose client parse to file transfer request message, obtain identification information, the encryption of source client
File to be sent afterwards and encryption key.
S160, purpose client are decrypted using the file to be sent after encryption secret key pair encryption, after being decrypted
File to be sent, and the file to be sent after decryption is decoded, obtain file to be sent.
Specifically, the file to be sent of acquisition is encoded by source client, and to the file to be sent after coding
It is encrypted, the file to be sent after being encrypted, and file transfer request message is sent to server, from server to purpose
Client send file transfer request message, purpose client the reception server send file transfer request message and to file
Transfer request message is parsed, obtain source client identification information, encryption after file to be sent and encryption key, and
Using encryption secret key pair encryption after file to be sent be decrypted, the file to be sent after being decrypted, and to decryption after
File to be sent is decoded, and obtains file to be sent.
The instant communicating method that the present embodiment provides, is encoded by source client to the file to be sent of acquisition, and
File to be sent after coding is encrypted, the file to be sent after being encrypted, and sends file transmission to server and ask
Message is sought, file transfer request message, the text that purpose client the reception server is sent are sent from server to purpose client
Part transfer request message simultaneously parses to file transfer request message, obtain source client identification information, encryption after treat
File and encryption key are sent, and is decrypted using the file to be sent after encryption secret key pair encryption, after being decrypted
File to be sent, and the file to be sent after decryption is decoded, file to be sent is obtained, so as to ensure that file to be sent
Security in transmitting procedure.
The flow chart for the instant communicating method that Fig. 2 is provided by the embodiment of the present invention two.Reference picture 2, the side of the present embodiment
Method can include：
S201, source user end to server send connection request message, and connection request message includes the mark of source client
Information.
S202, server receive connection request message, judge to whether there is idle thread in thread pool, if idle line be present
Journey, then S203 is performed, otherwise performs S204.
S203, server are that source client distributes an idle thread, and are established and source visitor by the idle thread of distribution
The connection at family end, then performs S207.
S204, server judge whether the number of the thread in thread pool reaches setting value.If thread in thread pool
Number is not up to setting value and then performs S205, and S206 is performed if the number of the thread in thread pool reaches setting value.
S205, server create new thread, and by the new thread foundation and the connection of source client of establishment, then perform
S207。
S206, server enter source client in waiting list, and judge whether release by polling mode
Idle thread, if server judges to know the idle thread in the presence of release, established and source client by the idle thread of release
The connection at end, then performs S207.
It should be noted that openfire servers can be used as the server referred in the present embodiment,
Openfire servers have very high efficiency and performance, and openfire servers can be connected with the substantial amounts of client of timely processing
Connect, the carrying maximum concurrency of separate unit openfire servers can reach more than 10000.For example, in S202 into S206, pin
To the connection request of each client, openfire servers can create the connection request that thread comes customer in response end, simultaneously
Thread pool management thread is created, the execution efficiency of openfire servers is improved, if 10000 idle lines in thread pool
Journey, then openfire servers can handle the connection request of 10000 clients simultaneously.And the number of threads in thread pool
The quantity of client request that is received according to server during operation of size be automatically adjusted, for example, if long
Time does not have client request, then can not have idle thread and line in thread pool when client has request with destroying threads
When Cheng Chi thread numbers are not reaching to setting value, then new thread can be created, (setting value is the number of threads for allowing to create
Maximum) when, then the client for sending connection request is entered in waiting list, until being free idle thread in thread pool.Also,
When client exits, thread can be recovered in thread pool by openfire servers, so as to have to thread
Effect management, improve the utilization rate of server resource.
S207, source client are encoded to the file to be sent of acquisition, and the file to be sent after coding is added
It is close, the file to be sent after being encrypted.
S208, source user end to server send file transfer request message, and file transfer request message includes source client
File to be sent after the identification information at end, encryption and the encryption key that file to be sent is encrypted.
S209, server send file transfer request message to purpose client.
The file transfer request message that S210, purpose client the reception server are sent.
S211, purpose client parse to file transfer request message, obtain identification information, the encryption of source client
File to be sent afterwards and encryption key.
S212, purpose client are decrypted using the file to be sent after encryption secret key pair encryption, after being decrypted
File to be sent, and the file to be sent after decryption is decoded, obtain file to be sent.
It should be noted that source client can also share current positional information, pass through global positioning system (Global
Positioning System, abbreviation GPS) and the current positional information of mobile network's Dual positioning, current positional information example
It can be such as latitude and longitude information, other clients can be shared with after obtaining current positional information.Pass through GPS and mobile network
Dual positioning process can be realized in the following way：
If source client judges to know that current position service function has been switched on, enable global position system GPS and enter
Row positioning, and judge the positional information of source client whether can be obtained by GPS location in preset time；If source client is sentenced
It is disconnected to be informed in the positional information that obtain source client in preset time by GPS location, then enable mobile network and obtain source
The positional information of client.Source client location, can be by server to purpose client transmission source to after its positional information
The positional information of client.
The instant communicating method that the present embodiment provides, after receiving connection request message by server, judge whether
Idle thread, an idle thread is distributed for source client if it idle thread be present, if idle thread is not present, judges line
Whether the number of the thread in Cheng Chi reaches setting value, if being not reaching to setting value, re-creates a new thread distribution
Source client is given, if reaching setting value, source client is put into waiting list, and determine whether to release by polling mode
The idle thread put, then can be that source client distributes idle thread, so as to improve server resource when being free idle thread
Service efficiency, realize effective utilization of server resource.And the file to be sent of acquisition is compiled by source client
Code, encryption, and the file of reception is decrypted purpose client, decoding process, so as to ensure that file to be sent is passing
Security during defeated.
The structural representation for the instantaneous communication system 300 that Fig. 3 is provided by the embodiment of the present invention three.Reference picture 3, this is instant
Communication system includes：Source client 310, server 320 and purpose client 330.
Source client 310 is used to encode the file to be sent of acquisition, and the file to be sent after coding is carried out
Encryption, the file to be sent after being encrypted；File transfer request message is sent to server, file transfer request message includes
File to be sent after the identification information of source client, encryption and the encryption key that file to be sent is encrypted；Service
Device 320 is used to send file transfer request message to purpose client；Purpose client 330 is used for the text that the reception server is sent
Part transfer request message；File transfer request message is parsed, obtain source client identification information, encryption after it is pending
Send file and encryption key；It is decrypted using the file to be sent after encryption secret key pair encryption, it is pending after being decrypted
File is sent, and the file to be sent after decryption is decoded, obtains file to be sent.
It should be noted that file to be sent file such as can be document, picture, source client gets to be sent
After file, the binary format byte stream of file to be sent can be obtained, binary format byte stream is encoded, can be made
The file to be sent such as picture or file is encoded with base64, then the file to be sent after coding is encrypted, is obtained
File to be sent after encryption, encryption the file to be sent after coding can be encrypted using IDEA encryption algorithm.
The instantaneous communication system that the present embodiment provides, is encoded by source client to the file to be sent of acquisition, and
File to be sent after coding is encrypted, the file to be sent after being encrypted, and sends file transmission to server and ask
Message is sought, file transfer request message, the text that purpose client the reception server is sent are sent from server to purpose client
Part transfer request message simultaneously parses to file transfer request message, obtain source client identification information, encryption after treat
File and encryption key are sent, and is decrypted using the file to be sent after encryption secret key pair encryption, after being decrypted
File to be sent, and the file to be sent after decryption is decoded, file to be sent is obtained, so as to ensure that file to be sent
Security in transmitting procedure.
Further, source client 310, it is additionally operable to before source client encodes to the file to be sent of acquisition,
Connection request message is sent to server, connection request message includes the identification information of source client；
Server 320, it is additionally operable to receive connection request message, and through judging to know idle thread in thread pool be present, then
An idle thread, and the idle thread foundation and the connection of source client for passing through server-assignment are distributed for source client.
Further, server 320, it is additionally operable to that idle thread is not present in thread pool through judging to know, then judges thread
Whether the number of the thread in pond reaches setting value；If the number for judging to know the thread in thread pool is not up to setting value,
Create new thread, and the new thread foundation and the connection of source client for passing through establishment.
Further, server 320, if the number for being additionally operable to judge to know the thread in thread pool reaches setting value,
Source client is entered in waiting list, and the idle thread of release is judged whether by polling mode；If judgement is known
In the presence of the idle thread of release, then the connection with source client is established by the idle thread of release.
Further, source client 310, if being additionally operable to judge to know that current position service function has been switched on, open
Positioned with global position system GPS, and judge the position of source client whether can be obtained by GPS location in preset time
Confidence ceases；If the positional information of source client can not be obtained by GPS location by judging to be informed in preset time, movement is enabled
The positional information of Network Capture source client；Positional information by from server to purpose client transmission source client.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；To the greatest extent
The present invention is described in detail with reference to foregoing embodiments for pipe, it will be understood by those within the art that：Its according to
The technical scheme described in foregoing embodiments can so be modified, either which part or all technical characteristic are entered
Row equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention technology
The scope of scheme.
Claims (2)
- A kind of 1. instant communicating method, it is characterised in that including：Source client is encoded to the file to be sent of acquisition, and the file to be sent after coding is encrypted, and is added File to be sent after close；The source user end to server sends file transfer request message, and the file transfer request message includes source visitor File to be sent after the identification information at family end, the encryption and the encryption key that the file to be sent is encrypted；The server sends the file transfer request message to purpose client；The purpose client receives the file transfer request message that the server is sent；The purpose client parses to the file transfer request message, obtain the source client identification information, File to be sent and the encryption key after the encryption；The purpose client is decrypted using the file to be sent after encryption described in the encryption secret key pair, after being decrypted File to be sent, and the file to be sent after the decryption is decoded, obtains the file to be sent；Before the source client encodes to the file to be sent of acquisition, in addition to：The source client is to the clothes Business device sends connection request message, and the connection request message includes the identification information of the source client；The server connects The connection request message is received, and through judging to know idle thread in thread pool be present, then distributes one for the source client Idle thread, and the idle thread foundation and the connection of the source client for passing through the server-assignment；The instant communicating method, in addition to：The server knows idle thread is not present in the thread pool through judging, then judges thread in the thread pool Whether number reaches setting value；If the number that the server judges to know the thread in the thread pool is not up to setting value, Then create new thread, and the new thread foundation and the connection of the source client for passing through establishment；The instant communicating method, in addition to：If the number that the server judges to know the thread in the thread pool reaches setting value, the source client is entered Enter in waiting list, and the idle thread of release is judged whether by polling mode；Deposited if the server judges to know In the idle thread of release, then the connection with the source client is established by the idle thread of the release；The instant communicating method, in addition to：If the source client judges to know that current position service function has been switched on, enable global position system GPS and enter Row positioning, and judge the positional information of the source client whether can be obtained by GPS location in preset time；The source visitor If family end judges to be informed in the positional information that can not obtain the source client in preset time by GPS location, shifting is enabled The positional information of source client described in dynamic Network Capture；The source client is sent out by the server to the purpose client Send the positional information of the source client.
- A kind of 2. instantaneous communication system, it is characterised in that including：Source client, server and purpose client；The source client, for being encoded to the file to be sent of acquisition, and the file to be sent after coding is added It is close, the file to be sent after being encrypted；File transfer request message, the file transfer request message bag are sent to server File to be sent after identification information, the encryption containing the source client and the file to be sent is encrypted Encrypt key；The server, for sending the file transfer request message to purpose client；The purpose client, the file transfer request message sent for receiving the server；The file is passed Defeated request message is parsed, and obtains the file to be sent after the identification information of the source client, the encryption and described Encrypt key；It is decrypted using the file to be sent after encryption described in the encryption secret key pair, it is to be sent after being decrypted File, and the file to be sent after the decryption is decoded, obtain the file to be sent；The source client, it is additionally operable to before the source client encodes to the file to be sent of acquisition, to the clothes Business device sends connection request message, and the connection request message includes the identification information of the source client；The server, it is additionally operable to receive the connection request message, and through judging to know idle thread in thread pool be present, then An idle thread is distributed for the source client, and is established and the source client by the idle thread of the server-assignment The connection at end；The server, it is additionally operable to that idle thread is not present in the thread pool through judging to know, then judges in the thread pool The number of thread whether reach setting value；If the number for judging to know the thread in the thread pool is not up to setting value, Create new thread, and the new thread foundation and the connection of the source client for passing through establishment；The server, if the number for being additionally operable to judge to know the thread in the thread pool reaches setting value, by the source Client enters in waiting list, and the idle thread of release is judged whether by polling mode；If presence is known in judgement The idle thread of release, then the connection with the source client is established by the idle thread of the release；The source client, if being additionally operable to judge to know that current position service function has been switched on, enable global positioning system System GPS is positioned, and judges the positional information of the source client whether can be obtained by GPS location in preset time； If judging to be informed in the positional information that can not obtain the source client in preset time by GPS location, mobile network is enabled Network obtains the positional information of the source client；The source client is sent to the purpose client by the server Positional information.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410676160.8A CN104410619B (en) | 2014-11-21 | 2014-11-21 | Instant communicating method and system |
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| CN201410676160.8A CN104410619B (en) | 2014-11-21 | 2014-11-21 | Instant communicating method and system |
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| CN104410619A CN104410619A (en) | 2015-03-11 |
| CN104410619B true CN104410619B (en) | 2017-12-19 |
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| CN105577650A (en) * | 2015-12-16 | 2016-05-11 | 北京握奇智能科技有限公司 | Remote time synchronization method and system of one-time password (OTP) |
| CN106375337B (en) * | 2016-09-30 | 2019-12-06 | 杭州迪普科技股份有限公司 | Message interaction method and device based on multithreading |
| CN106487659B (en) * | 2016-10-20 | 2022-12-20 | 宇龙计算机通信科技(深圳)有限公司 | Information encryption method, information encryption device and terminal |
| CN107613031A (en) * | 2017-11-08 | 2018-01-19 | 杭州亿方云网络科技有限公司 | A kind of document transmission system |
| CN108040115B (en) * | 2017-12-21 | 2021-03-02 | 北京华夏电通科技股份有限公司 | File transmission method and device |
| CN109635016A (en) * | 2018-10-16 | 2019-04-16 | 深圳壹账通智能科技有限公司 | Data transfer device, device, equipment and computer readable storage medium |
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