CN109005376A - A kind of law-enforcing recorder network uploaded videos data method for anti-counterfeit - Google Patents
A kind of law-enforcing recorder network uploaded videos data method for anti-counterfeit Download PDFInfo
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- CN109005376A CN109005376A CN201810910186.2A CN201810910186A CN109005376A CN 109005376 A CN109005376 A CN 109005376A CN 201810910186 A CN201810910186 A CN 201810910186A CN 109005376 A CN109005376 A CN 109005376A
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000012795 verification Methods 0.000 claims abstract description 15
- 238000004590 computer program Methods 0.000 claims description 6
- 239000000284 extract Substances 0.000 claims description 3
- 238000011835 investigation Methods 0.000 claims description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 14
- 230000005540 biological transmission Effects 0.000 description 7
- 238000012790 confirmation Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000013524 data verification Methods 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
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
- H04N21/25808—Management of client data
- H04N21/25816—Management of client data involving client authentication
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
- H04N21/266—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel
- H04N21/26613—Channel or content management, e.g. generation and management of keys and entitlement messages in a conditional access system, merging a VOD unicast channel into a multicast channel for generating or managing keys in general
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
- H04N21/27—Server based end-user applications
- H04N21/274—Storing end-user multimedia data in response to end-user request, e.g. network recorder
- H04N21/2743—Video hosting of uploaded data from client
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N5/00—Details of television systems
- H04N5/76—Television signal recording
- H04N5/91—Television signal processing therefor
- H04N5/913—Television signal processing therefor for scrambling ; for copy protection
- H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
- H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled
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- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Databases & Information Systems (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Graphics (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Storage Device Security (AREA)
Abstract
The invention discloses a kind of law-enforcing recorder network uploaded videos data method for anti-counterfeit, include the following steps: that A1, control centre generate ciphertext data and are added in infrasound according to the identity information and real-time time of video recording person to emit, records real-time video and platform of uploading onto the server；A2, server platform receive the real-time video and decrypt, and verify the identity information of video recording person and the consistency of real-time time, are verified as a result, being fed back and being handled according to verification result.It is transmitted using the encryption to identity information and real-time time, and by encryption information using infrasound, it is difficult to crack, upload network video more safe and reliable.
Description
Technical field
The present invention relates to field of network transmission more particularly to a kind of law enforcement to record network uploaded videos data method for anti-counterfeit.
Background technique
Currently, the safety in order to protect network uploaded videos, mostly uses greatly the method for encryption to realize, and the side encrypted
There are many methods, but when real-time video uploads, there is no the verifyings of progress whether legal for the uploader of real-time video, also do not have
Have to whether being verifying that real-time video carries out, such as in enforcing law, video that whether video of upload shot at that time
Rather than the playback of filmed video already, alternatively, uploaded videos person is law-executor, thus, to uploaded videos
The confirmation of person's identity information and the confirmation of real-time video authenticity, are current urgent problems to be solved.
Summary of the invention
How to the confirmation of uploaded videos person's identity information and in real time the purpose of the present invention is to solve prior art view
The problem of confirmation of frequency authenticity, this application provides a kind of law enforcements to record network uploaded videos data method for anti-counterfeit.
In order to solve the above-mentioned technical problem, the application adopts the following technical scheme that
A kind of law enforcement record network uploaded videos data method for anti-counterfeit, includes the following steps:
A1, control centre generate ciphertext data according to the identity information and real-time time of video recording person,
A2, control centre emit ciphertext data investigation into infrasound,
A3, control centre receive the real-time video of video recording person's record and are uploaded to server platform.
Preferably, control centre generates source code according to real-time time and the identity information of video recording person, uses secret key
Algorithm obtains ciphertext data.
Preferably, video recording person's login service device platform carries out system time correction, guarantees and the server platform time
Unanimously.
Preferably, the source code is added to obtain ciphertext data with password word string.Video recording person is law-enforcing recorder,
Identity information is recorder own sequence number.
Preferably, the ciphertext data are transferred to infrasonic wave generator by control centre, are added to by infrasonic wave generator
Emitted in the infrasound of certain frequency.
Preferably, after the ciphertext data are converted to binary system by control centre, it is transferred to infrasonic wave generator.
Preferably, control centre's record surrounding image and sound, obtain real-time video, and upload real-time video to server
Platform.
Preferably, infrasonic frequency is 19hz；When control centre uploads real-time video, first transmission is opened code and is indicated
Real-time video transmission is opened, and server platform confirms the beginning of one section of real-time video according to code is opened.
A kind of control centre's device has computer program, and described program is for running to implement such as step A1, A2, A3
The method.
A kind of law-enforcing recorder network uploaded videos data method for anti-counterfeit, includes the following steps:
B1, server platform receive real-time video and are decrypted；
The consistency of the identity information of B2, the identity information of server platform verifying video recording person and registrant, and it is real
When time of the video and consistency of real-time time, be verified result；
B3, it is fed back and is handled according to verification result.
Preferably, in the step B1, server platform receives real-time video and extracts the infrasonic sound wave number in real-time video
According to obtaining the identity information and video recording sessions of video recording person after decryption.
Preferably, in the step B1, server platform receives real-time video and extracts the unlatching code in infrasound data,
It is correct such as to open code, then is determined as complete ciphertext data, complete ciphertext data are decoded and verifies and judges whether it is legal
Data；It is incorrect such as to open code, then is determined as incomplete ciphertext data, server platform continues waiting for next complete ciphertext number
According to being verified.
Preferably, in the step B2, when the identity information and login service device platform that verification result is video recording person
Video recording person identity information it is consistent, and video recording sessions and when server platform time consistency, then it is assumed that be legal
Data；Otherwise, then it is assumed that be invalid data.
Preferably, in the step B3, for valid data, continue to prepare to receive next ciphertext data continuous verification；
For invalid data, interrupts receive and process immediately.
A kind of server platform device, has computer program, and described program is implemented claim such as running and walked
Method described in rapid B1, B2, B3.
A kind of method for anti-counterfeit of law-enforcing recorder network uploaded videos data, include the following steps: C1, control centre according to
The identity information of video recording person generates ciphertext data and be added in infrasound with real-time time to be emitted, and view in real time is recorded
Frequency and platform of uploading onto the server；C2, server platform receive the real-time video and decrypt, and verify the identity of video recording person
The consistency of information and real-time time is verified as a result, being fed back and being handled according to verification result.
A kind of device of law-enforcing recorder network uploaded videos data, including control centre, server platform, described device
With computer program, described program is for running to implement the method as described in step C1, C2.
Preferably, infrasonic frequency is 19hz.
Compared with prior art, the invention has the benefit that
Law enforcement of the invention records network uploaded videos data method for anti-counterfeit, using uploaded videos person's identity information be
The synchronous real-time time of system is encrypted, it is ensured that the authenticity of uploaded videos person's identity and the authenticity of real-time time prevent
The presence that illegal upload and video playback upload, ensure that the authenticity for uploading real-time video.
Further, encryption information is transmitted using infrasound, takes full advantage of infrasound lower than human auditory system frequency
Rate range has stronger concealment, is not easy to decay, is not easy the characteristics of being absorbed by water and air, can truly be recorded instrument
Record.
Further, it is transmitted using infrasound, it is difficult to crack, upload network video more safe and reliable.
Further, when real-time video transmission starts, code is opened in addition, it is ensured that and the real-time video received is complete video,
Avoid video imperfect.
Detailed description of the invention
The method structural schematic diagram of Fig. 1 embodiment of the present invention；
The server platform algorithm flow schematic diagram of Fig. 2 embodiment of the present invention；
The server platform algorithm flow schematic diagram of Fig. 3 embodiment of the present invention.
Specific embodiment
With reference to embodiment and compares attached drawing the present invention is described in further details.It is emphasized that
Following the description is only exemplary, the range and its application being not intended to be limiting of the invention.
A kind of law enforcement of the invention records network uploaded videos data method for anti-counterfeit, includes the following steps:
A1, control centre generate ciphertext data and the infrasonic sound that is added to according to the identity information and real-time time of video recording person
Emitted in wave, records real-time video and platform of uploading onto the server；
A2, server platform receive the real-time video and simultaneously decrypt, verify video recording person identity information and it is real-time when
Between consistency, be verified as a result, being fed back and being handled according to verification result.
Video recording person can there are many, description of the invention is illustrated by taking law-enforcing recorder as an example, remaining is with such
It pushes away.
Control centre MCU and infrasonic wave generator are all disposed on recorder.MCU controls infrasonic wave generator and emits infrasonic sound
Wave, so infrasound exists around recorder after transmitting.Recorder hardware acquisition is integrated to image and voice data by MCU
It is processed into video data, carries out video upload.
In one embodiment of the invention, a kind of law enforcement records network uploaded videos data method for anti-counterfeit, such as Fig. 1 institute
Show, step A1 include it is following step by step:
A11, firstly, law-enforcing recorder login service device platform, carry out system time correction, guarantee the reality of law-enforcing recorder
When the time it is consistent with the real-time time of server platform.
Control centre MCU generates source code according to the identity information of real-time time and law-enforcing recorder, uses key-encryption algorithm
Obtain ciphertext data.The identity information of law-enforcing recorder is recorder own sequence number.
How many position of source code, encryption word string is identical as original code bit number, source code with password word string is added to obtain close
Literary data.
Ciphertext data are transferred to infrasonic wave generator by A12, control centre MCU, are added to centainly by infrasonic wave generator
Emitted in the infrasound of frequency.
Preferably, after ciphertext data are converted to binary system by control centre, it is transferred to infrasonic wave generator.
Preferably, binary ciphertext data are transmitted to infrasonic wave generator by control centre MCU, are folded by infrasonic wave generator
It is added in the infrasound of certain frequency and is emitted, respectively represent 1,0 with high and low, from left to right successively by binary system ciphertext number
According to emitting.
A13, control centre MCU record surrounding image and sound (including infrasound), obtain real-time video, and control centre will
They are converted to standard data stream, and platform of uploading onto the server is verified.
As shown in Fig. 2, step A2 include it is following step by step:
A21, server platform verify real-time video, and infrasonic sound wave number is isolated from the voice data of real-time video
According to carrying out following small step respectively again according to separating resulting:
If A211, infrasound can be isolated, ciphertext data can be obtained.It according to key-encryption algorithm, is decrypted, is solved
Password, to obtain the identity information and temporal information of the sound uploader, by with server platform real-time time and log in
Record is verified,
When the identity information of uploader is consistent with platform information is logged in, and video time and server platform real-time time phase
Simultaneously, then it is assumed that be that legal video uploads.Two aspects are proved to be successful, and guarantee the integrality that network video uploads.
When the identity information of uploader with log in that platform information is inconsistent or video time and server platform real-time time
When different, then invalid data is verified as.
If A212, voice data can not separate infrasound data, it is verified as invalid data.
A22, server platform are fed back and are handled to verification result.It, can immediately when verification result is invalid data
It interrupts and receives illegal video flow data, be simultaneously emitted by warning, reporting to related personnel has illegal video entrance, is handled.
When verification result is valid data, next ciphertext data will be received, repeat step A2, the moment supervises uploaded videos
Integrality.
In yet another embodiment of the present invention, in step A1, ciphertext data and upload real-time video are in the following manner
It carries out:
Video uploader such as law-enforcing recorder 03 divides login service device platform in Beijing time 2018.07.17 15, remembers
Instrument itself serial number 0001 is recorded, then source code are as follows: 2018071715030001.
1234 are used as secret key, source code has 16, then encrypting word string also is 16, it repeats to insert with secret key sequence,
Obtain encryption word string 1234123412341234.Source code is added to obtain ciphertext data with encryption word string:
2018071715030001
+1234123412341234
=3252195127371235
So obtaining ciphertext data 3252195127371235.
Ciphertext data are transferred to infrasonic wave generator by control centre MCU, are added to 19hz frequency by infrasonic wave generator
Infrasound in emitted.
Preferably, after ciphertext data are converted to binary system by control centre, it is transferred to infrasonic wave generator.
Ciphertext data 3252195127371235 are converted to binary system by control centre MCU: 1,011 1,000 1101
1101 1010 1010 1111 0100 1110 1010 0101 1110 0011.Control centre MCU is by binary ciphertext
Data are transmitted to infrasonic wave generator, are emitted in the infrasound for the 19hz frequency that is added to by infrasonic wave generator, with high and low point
1,0 is not represented, from left to right successively emits binary system ciphertext data.
Control centre MCU records surrounding image and sound, includes infrasound in the sound, obtains real-time video, controls
Center converts them to standard data stream, and platform of uploading onto the server is verified.
Server platform is verified real-time video and handled in step A2 carries out in the following way:
Server platform verifies real-time video, and infrasound data are isolated from the voice data of real-time video,
Following steps are carried out respectively according to separating resulting:
If infrasound can be isolated, it can obtain having ciphertext data 3252195127371235 as aforementioned.According to secret key
Algorithm is decrypted:
3252195127371235
-1234123412341234
=2018071715030001
Deciphering 2018071715030001 is obtained, thus show when the sound is 2018.07.17 15 that 03 divides, sequence
Number 0001 recorder uploads, when 2018.07.17 15 03 divide it is consistent with server platform real-time time, then it is assumed that be real-time video
It uploads, sequence number is consistent with platform recorder sequence number is logged in, then it is assumed that be that legal video uploads.Two aspects are proved to be successful, and are protected
Demonstrate,prove the integrality that network video uploads.
Verification result is valid data, will receive next ciphertext data, repeats above step, and the moment supervises uploaded videos
Integrality.
If voice data can not separate infrasound data, it is verified as invalid data.
When verification result is invalid data, it can interrupt immediately and receive illegal video flow data, be simultaneously emitted by warning, report to
Related personnel has illegal video entrance, is handled.
Server platform can receive more recorders parallel and upload real-time video, be only to invalid data processing
It interrupts and receives the video that invalid data recorder uploads, do not influence to receive other recorder videos.
For being verified as uploading the recorder of invalid data, after needing related personnel's check clear and solving the problems, such as, just have the right
The new uploaded videos of freight weight limit.
In yet another embodiment of the present invention, when infrasound transmits encryption real-time video, server platform is possible to
It is received in the midway of transmission encryption real-time video, causes ciphertext to receive incomplete, can judge this video by accident is illegal video.To solve this
N number of binary system is added before ciphertext data and opens code, so that platform is tested in step A1 after obtaining ciphertext data for a problem
Ciphertext data integrity is demonstrate,proved, ciphertext data are transferred to infrasonic wave generator together with unlatching code by control centre MCU, by infrasound
Generator, which is added in the infrasound of certain frequency, to be emitted.
As shown in figure 3, server platform verifies real-time video in step A2, from the sound number of real-time video
Infrasound data are isolated in, if infrasound can be isolated, can obtain ciphertext data, unlike Fig. 2:
If obtaining is that N number of binary system opens code before ciphertext data, it is judged as complete ciphertext data, to receiving
Complete ciphertext data verifying is decrypted, and judge whether it is valid data.
If obtaining is not that N number of binary system opens code before ciphertext data, it is judged as incomplete ciphertext data, server
Platform continues waiting for next complete ciphertext data verification.
Preferably, N number of binary system opens code and is set as 81 binary systems unlatching codes.
Preferably, before infrasound sends ciphertext data, 81 binary systems is first sent and open code, such server platform receives
Code is opened to 81 binary systems, just judges and is followed by complete ciphertext data.If 81 unlatching codes are not received, as connecing halfway
When rating frequency uploads, then it is judged as incomplete ciphertext data, next unlatching code is waited, then receive ciphertext, is verified.
Control centre MCU uninterruptedly emits ciphertext data binary code in control infrasonic wave generator always, with aforementioned close
Literary data 3252195127371235 are illustrated, and infrasonic wave generator, which emits, corresponds to binary code: 1,011 1,000 1,101 1101
1010 1,010 1,111 0,100 1,110 1,010 0,101 1,110 0011, after having emitted front 1,011 1000, carry out real-time
Video uploads, and it is exactly 1,101 1,101 1,010 1,010 1,111 0,100 1110 that server platform, which receives infrasound data,
1010 0,101 1,110 0011, infrasonic wave generator opens code without addition before ciphertext data, and server platform receives secondary
Sonic data beginning is not 1,111 1111, then it is assumed that the data are not complete, are judged as incomplete ciphertext data, continue waiting for receiving
Open the infrasound data that code is 1,111 1111.81 binary systems are added and open code, transmitting binary code: 1,111 1111
1011 1,000 1,101 1,101 1,010 1,010 1,111 0,100 1,110 1,010 0,101 1,110 0011, server platform connects
Receiving infrasound Data Start is 1,111 1111, then it is assumed that the data are complete, are immediately below exactly complete ciphertext data,
It can be decoded verifying work below, judge whether it is valid data；After finishing receiving, continuing waiting for reception unlatching code is
1111 1111 infrasound data.
The application is that following feature is utilized using the coded signal of infrasound transmission real-time video:
Infrasound is lower than human auditory system frequency range, there is stronger concealment.Simultaneously infrasound be not easy to decay, be not easy by
Water and air absorbs, and can be recorded well instrument and record.
The application uses voice transmission simultaneously, is different from conventional cryptographic fashion, it is difficult to crack, upload network video more
Securely and reliably.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
Specific implementation of the invention is only limited to these instructions.For those skilled in the art to which the present invention belongs, it is not taking off
Under the premise of from present inventive concept, several equivalent substitute or obvious modifications can also be made, and performance or use is identical, all answered
When being considered as belonging to protection scope of the present invention.
Claims (13)
1. a kind of law-enforcing recorder network uploaded videos data method for anti-counterfeit, which comprises the steps of:
A1, control centre generate ciphertext data according to the identity information and real-time time of video recording person,
A2, control centre emit ciphertext data investigation into infrasound,
A3, control centre receive the real-time video of video recording person's record and are uploaded to server platform.
2. method for anti-counterfeit according to claim 1, which is characterized in that in the step A1, control centre's login service device
Platform corrects system time, then generates source code according to real-time time and the identity information of video recording person, is calculated using secret key
Method obtains ciphertext data.
3. method for anti-counterfeit according to claim 2, which is characterized in that the source code is added to obtain ciphertext with password word string
Data；Video recording person is law-enforcing recorder, and identity information is recorder own sequence number.
4. method for anti-counterfeit according to claim 1, which is characterized in that control centre will open code and the ciphertext data pass
It is defeated by infrasonic wave generator, is emitted in the infrasound for the certain frequency that is added to by infrasonic wave generator.
5. method for anti-counterfeit according to claim 1, which is characterized in that control centre records surrounding image and sound, obtains
Real-time video, and real-time video is uploaded to server platform；The infrasonic sound wave frequency rate is 19hz.
6. a kind of control centre's device, which is characterized in that there is computer program, described program is for running to implement such as right
It is required that method described in 1 to 5.
7. a kind of law-enforcing recorder network uploaded videos data method for anti-counterfeit, which comprises the steps of:
B1, server platform receive real-time video and are decrypted；
The consistency of the identity information of B2, the identity information of server platform verifying video recording person and registrant, and view in real time
The time of frequency and the consistency of real-time time, are verified result；
B3, it is fed back and is handled according to verification result.
8. method for anti-counterfeit according to claim 7, which is characterized in that in the step B1, server platform receives real-time
Video simultaneously extracts the infrasound data in real-time video；Code is opened in analysis first, and such as unlatching code is correct, then is determined as complete ciphertext
Data obtain the identity information and video recording sessions of video recording person after complete ciphertext data are decrypted；Such as open code
It is incorrect, then it is determined as incomplete ciphertext data, server platform continues waiting for next complete ciphertext data and verified.
9. method for anti-counterfeit according to claim 7, which is characterized in that in the step B2, when verification result is video note
The identity information of record person is consistent with the identity information of video recording person of login service device platform, and video recording sessions and service
When device plateau time is consistent, then it is assumed that be valid data；Otherwise, then it is assumed that be invalid data.
10. method for anti-counterfeit according to claim 9, which is characterized in that in the step B3, for valid data, continue
Prepare to receive next ciphertext data, continuous verification；For invalid data, interrupts receive and process immediately.
11. a kind of server platform device, which is characterized in that there is computer program, described program is for running to implement such as
Method described in claim 7 to 10.
12. a kind of method for anti-counterfeit of law-enforcing recorder network uploaded videos data, which comprises the steps of:
C1, control centre generate ciphertext data according to the identity information and real-time time of video recording person and are added in infrasound
Emitted, records real-time video and platform of uploading onto the server；
C2, server platform receive the real-time video and simultaneously decrypt, and verifies the identity information and real-time time of video recording person
Consistency is verified as a result, being fed back and being handled according to verification result.
13. a kind of device of law-enforcing recorder network uploaded videos data, which is characterized in that flat including control centre, server
Platform, described device have computer program, and described program is for running to implement method as claimed in claim 12.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110602157A (en) * | 2019-06-27 | 2019-12-20 | 刘启强 | Block chain work recorder |
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| CN106160878A (en) * | 2015-04-01 | 2016-11-23 | 飞云卓越数据应用科技（平潭）有限公司 | Active the ultrasonic infrasonic wave that involves is utilized to send and add the electronic installation of confidential information |
| CN108022194A (en) * | 2017-11-28 | 2018-05-11 | 深圳市华德安科技有限公司 | Law-enforcing recorder and its data safety processing method, server and system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110602157A (en) * | 2019-06-27 | 2019-12-20 | 刘启强 | Block chain work recorder |
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