CN206757624U - Display system with content safety distribution and display function - Google Patents
Display system with content safety distribution and display function Download PDFInfo
- Publication number
- CN206757624U CN206757624U CN201621295211.3U CN201621295211U CN206757624U CN 206757624 U CN206757624 U CN 206757624U CN 201621295211 U CN201621295211 U CN 201621295211U CN 206757624 U CN206757624 U CN 206757624U
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- display
- content
- key
- management chip
- safety management
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- 238000009826 distribution Methods 0.000 title claims abstract description 11
- 230000008054 signal transmission Effects 0.000 claims abstract description 21
- 230000001681 protective effect Effects 0.000 claims description 35
- 238000007789 sealing Methods 0.000 claims description 9
- 230000006870 function Effects 0.000 claims description 8
- 230000005611 electricity Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000009545 invasion Effects 0.000 description 10
- 238000000034 method Methods 0.000 description 8
- 230000009172 bursting Effects 0.000 description 4
- 238000003860 storage Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 150000003071 polychlorinated biphenyls Chemical class 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000011521 glass Substances 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000010365 information processing Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000001960 triggered effect Effects 0.000 description 1
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Abstract
The utility model provides the display system with content safety distribution and display function, including content generation device and content display.Content generation device encrypts to obtain encrypted content source when making content to be displayed source, to content source using key, and key is encrypted using public key to obtain encryption key, and encrypted content source and encryption key are stored to content display together.Content display includes display control unit, signal transmission unit and display screen and safety management chip.For safety management chip after content display gets encrypted content source and encryption key, control utilizes private key pair encryption secret key decryption, is decrypted using the key pair encryption content source after decryption, and controls and the content source after decryption is decoded.Display control unit produces according to decoded content source shows signal, and output display signal to the display screen to play the content source.The utility model may be such that the interests of content production business are effectively protected.
Description
Technical field
It the utility model is related to a kind of display system, more particularly to a kind of encryption and decryption content source have content safety distribution
And the display system of display function.
Background technology
Existing display device, for example, mobile phone, tablet personal computer or head-mounted display apparatus etc., can be provided easily interior
Hold display, shown content includes but is not limited to film, TV or document.So, existing display device can not be protected in it
Rong Yuan is copied during transmission so that the interests of content production business receive the infringement of illegal pirated disc copier.
Utility model content
In view of this, it is necessary to a kind of display system with content safety distribution and display function is provided, with solution
State problem.
The utility model provides a kind of display system with content safety distribution and display function.The display system bag
Content generation device and content display are included, the content generation device is used for when making content to be displayed source, to described
Content to be displayed source is encrypted to obtain encrypted content source using key, and key is encrypted to obtain using public key and encrypts key,
And encrypted content source and encryption key are sent to the content display, the content display include display control list
Member, signal transmission unit, display screen and safety management chip, the display control unit pass through the signal transmission unit and institute
Display screen electrical connection is stated, the safety management chip is described by encrypted content source for being got in the content display
And after encryption key, the key encryption key being decrypted using a private key with after being decrypted is controlled, is then utilized
Key after the decryption encrypted content source is decrypted with the content source after being decrypted, the safety management chip
Also control and the content source after the decryption is decoded；The display control unit is used to be produced according to decoded content source
Signal is shown, and by displaying signal to the display screen described in signal transmission unit output, to cause the display screen
The content source is played according to the display signal.
Preferably, the content display also includes memory, and the memory is used to store in encryption to be shown
Rong Yuan, the encryption key for decrypting the encrypted content source, the safety management chip-stored have the private key, the content
Display device also includes intrusion detecting unit and protective casing, the safety management chip respectively with the display control unit and
The memory electrical connection, the intrusion detecting unit electrically connect with the safety management chip, and the protective casing forms one
Sealing space, the display control unit, signal transmission unit, safety management chip and the intrusion detecting unit housing are in institute
State in sealing space, the intrusion detecting unit is used to detect the intrusion event to the protective casing, the safety management core
Piece is used to also judge the intrusion detecting list after the content display gets the encrypted content source and encryption key
Whether member detects the intrusion event, when the intrusion detecting unit does not detect the intrusion event, the bursting tube
Reason chip controls the encryption key are decrypted using the private key with the key after being decrypted, and then utilize the solution
Key after close the encrypted content source is decrypted with the content source after being decrypted, and then controls to after the decryption
Content source is decoded.
Preferably, when the intrusion detecting unit detects the intrusion event, the safety management chip controls are deleted
Except the private key in the safety management chip or the private key being temporarily stored into content display in corresponding module.
Preferably, when the intrusion detecting unit detects the intrusion event, the safety management chip is additionally operable to
Any ongoing service of the content display is interrupted, and deletes the encrypted content source in the memory and encrypts close
Key, and delete the content source being decrypted in content display.
Preferably, the content display also includes random access memory, decoder and deciphering module, the random storage
Device, decoder and deciphering module are sequentially connected electrically, and the deciphering module is connected with the memory, the random access memory and institute
Display control unit electrical connection is stated, the deciphering module and the decoder also electrically connect with the safety management chip, described
Safety management chip, which is used to control, keeps in private key to the deciphering module, and controls the deciphering module from the memory
The encrypted content source and the encryption key are read, and controls the deciphering module to be carried out according to the private key pair encryption key
Then decryption the content source is decrypted according to the key after decryption with the key after being decrypted；The safety management
Chip simultaneously controls the decoder to decode the content source after the decryption, and decoded content source is temporarily stored in
In the random access memory；The display control unit reads the decoded content source and defeated from the random access memory
Go out corresponding display signal, and transmitted the display signal to the display screen by the signal transmission unit, to cause
The display screen plays the content source according to the display signal.
Preferably, the content display also includes battery, and the battery electrically connects with the safety management chip, institute
State battery and be used to be the safety management chip power supply, when the battery electric quantity lacks less than preset value or the battery,
The safety management chip is judged as intrusion event, and controls the private key deleted in the safety management chip, Huo Zhejin
The content source after the decryption in content source, the encryption key and the content display in the one step deletion memory
In it is at least one.
Preferably, the intrusion detecting unit includes some intrusion detecting circuits, and some intrusion detecting circuits are set
In the inner surface of the protective casing.
Preferably, each intrusion detecting circuit includes an at least pressure sensor, and the pressure sensor is applied for sensing
It is added in and believes for sensing the pressure being applied on the protective casing and producing sensing when the pressure is less than a predetermined threshold value
Number, the safety management chip is judged as intrusion event when receiving the sensing signal, and controls and delete the bursting tube
The private key in chip is managed, or further deletes the content source in the memory and the decruption key.
Preferably, the protective casing is made up of opaque or hard material.
Preferably, when the intrusion detecting unit detects the intrusion event, the safety management chip is additionally operable to
Control produces caution signal.
Display system of the present utility model, by the encryption of the key to content source, its content source is effectively protected to transmit
During be not copied so that the interests of content production business are effectively protected.
Brief description of the drawings
, below will be in the utility model embodiment in order to illustrate more clearly of the technical scheme of the utility model embodiment
The required accompanying drawing used is briefly described, it should be apparent that, drawings described below is only of the present utility model one
A little embodiments, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the structural representation of the display system with content safety distribution and display function of the utility model embodiment
Figure.
Fig. 2 is the content safety distribution and the schematic flow sheet of display methods of the utility model embodiment.
Embodiment
In order to be more clearly understood that above-mentioned purpose of the present utility model, feature and advantage, below in conjunction with this practicality
Accompanying drawing in new embodiment, the technical scheme in the embodiment of the utility model is clearly and completely described.Need to illustrate
, in the case where not conflicting, the feature in embodiments herein and embodiment can be mutually combined.
Many details are elaborated in the following description in order to fully understand the utility model, described implementation
Example is only part of the embodiment of the present utility model, rather than whole embodiments.Based on the embodiment in the utility model, sheet
All other embodiment that field those of ordinary skill is obtained under the premise of creative work is not made, belongs to this practicality
Novel protected scope.
Unless otherwise defined, all of technologies and scientific terms used here by the article is led with belonging to technology of the present utility model
The implication that the technical staff in domain is generally understood that is identical.It is simply in term used in the description of the present utility model herein
The purpose of description specific embodiment, it is not intended that in limitation the utility model.Term as used herein " and/or " include
The arbitrary and all combination of one or more related Listed Items.
It should be noted that when a component is considered as " connection " another component, it can be directly to separately
One component may be simultaneously present component placed in the middle.
Fig. 1 is the module diagram of display system in the embodiment of the utility model one.Display system 100 produces including content
Device 10 and content display 20.The content generation device 10 is used for when making content to be displayed source, utilizes key pair
The content to be displayed source is encrypted to obtain encrypted content source using symmetric encipherment algorithm, and the key is adopted using public key
Be encrypted to obtain encryption key with rivest, shamir, adelman, and sent after encrypted content source and encryption key are stored together to
The content display 20.The content display 20 be it is a kind of can according to the instruction for being previously set or storing, from
Dynamic progress numerical computations and/or the equipment of information processing, its hardware include but is not limited to microprocessor, application specific integrated circuit
（Application Specific Integrated Circuit, ASIC）, programmable gate array（Field-
Programmable Gate Array, FPGA）, digital processing unit（Digital Signal Processor, DSP）, it is embedded
Formula equipment etc..It is mobile phone, tablet personal computer, wearable glasses, VR glasses etc. that the content display 20, which may be, but not limited to,
Possesses the electronic equipment of display and processing function.The content display 20 by network and the content generation device 10 it
Between communicate, wherein, network includes, but are not limited to internet, wide area network, Metropolitan Area Network (MAN), LAN, VPN（Virtual
Private Network, VPN）Deng.The content display 20 is used to content source being converted to display signal and will shown
Signal is converted to optical signal output.Obviously, in certain embodiments, the content generation device 10 can be by encrypted encryption
Appearance source and encryption key are stored and sent respectively to the content display 20.
The content display 20 includes display control unit 21, signal transmission unit 22, display screen 23 and bursting tube
Manage chip 25.The display control unit 21 is electrically connected by the signal transmission unit 22 with the display screen 23.The peace
Full managing chip 25 is used for after the content display 20 gets the content source by encryption and key, control profit
With a private key to the encryption key decryption with the key after being decrypted, then using the key after the decryption to described plus
Close content source is decrypted with the content source after being decrypted.Wherein, it is to pass through asymmetric decryption to the encryption key decryption
Algorithm is decrypted, and the encrypted content source is decrypted to be decrypted by symmetrical decipherment algorithm.The safety management
Chip 25 also controls to be decoded to the content source after the decryption.The display control unit 21 is used for according to decoded interior
Rong Yuan, which is produced, shows signal, and by the signal transmission unit 22 export it is described display signal to the display screen 23 so that
Obtain the display screen 23 and the content source is played according to the display signal.In the present embodiment, the signal transmission unit 22 can
Think signal transmssion line etc..In other embodiments, the signal transmission unit 22 is other electricity with signal transfer functions
Sub- component.
In one embodiment, the content display 20 also includes memory 24, the memory 24 be used to storing from
The content source to be shown of the reception of content generation device 10, the encryption key for decrypting the content source.The safety management
Chip 25 is stored with the private key for decrypting the encryption key.The memory 24 can be smart media card（Smart
media card）, safe digital card（Secure digital card）, flash memory cards（Flash card）Set Deng storage
It is standby.
In one embodiment, the content display 20 also includes intrusion detecting unit 26 and protective casing 27, described
Safety management chip 25 electrically connects with the display control unit 21 and the memory 24 respectively, the intrusion detecting unit 26
Electrically connected with the safety management chip 25.
Wherein, the safety management chip 25 can be central processing unit, microprocessor, microcontroller, single-chip microcomputer, numeral letter
Number processor etc..
Wherein, the intrusion detecting unit 26 is used to detect whether the protective casing 27 is invaded.The safety management
Chip 25 is used to also judge the invasion after the content display 20 gets the encrypted content source and encryption key
Whether detecting unit 26 detects intrusion event.When the intrusion detecting unit 26 detects the intrusion event, the peace
The full control of managing chip 25 is deleted the private key in the safety management chip 25 or is temporarily stored into content display 20 corresponding
Private key in module.In certain embodiments, when the intrusion detecting unit 26 detects the intrusion event, the safety
Managing chip 25 is additionally operable to interrupt any ongoing service of the content display 20, and deletes in the memory 24
Encrypted content source and encryption key, and delete content display 20 in the content source being decrypted.In some realities
Apply in example, the safety management chip 24 is additionally operable to when the intrusion detecting unit 25 detects the intrusion event, is deleted
Protection in need security information, and be not limited only to foregoing key and encryption or decryption content source.
Specifically, in one embodiment, the intrusion detecting unit 26 includes some flexible PCBs（It is not shown）With set
Some intrusion detecting circuits being placed on each flexible PCB（It is not shown）, some flexible PCBs are arranged at described anti-
The inner surface of protective case body 27.In other embodiments, the intrusion detecting unit 26 can only include intrusion detecting circuit, it is described enter
The inner surface that circuit for detecting is directly arranged at the protective casing 27 is invaded, some flexible PCBs can omit.
Further, in one embodiment, each intrusion detecting circuit includes sensor（It is not shown）, the sensor use
In the invasion signal corresponding to sensing intrusion event and generation.The safety management chip 25 is receiving the invasion signal
When, control produces the caution signal.
Further, in one embodiment, the sensor is pressure sensor, for detect protective casing 27 whether by
Open, if protective casing 27 is opened, the pressure that pressure sensor can be caused to sense is reduced or disappeared, therefore, the pressure
Force snesor senses when pressure is less than a predetermined threshold value and produces the invasion signal.For example, the pressure sensor can be set
In the interlayer of protective casing 27 and by the clamp pressure of interlayer, when protective casing 27 is not switched on, the pressure sensor
The pressure sensed is more than the predetermined threshold value, and when protective casing 27 is opened, then clamp pressure disappears, the pressure sensing
The pressure that device senses will be less than the predetermined threshold value.In other embodiments, the sensor can be but not limited to, and power is quick
Sensor, torque or torque sensor etc..
The protective casing 27 forms a sealing space, is a safety zone in its sealing space.The display control list
Member 21, signal transmission unit 22, safety management chip 25 and the intrusion detecting unit 26 are contained in the sealing space.Institute
State protective casing 27 and be arranged on the display control unit 21, signal transmission unit 22, safety management chip 25 and the invasion
The outside of detecting unit 26, any physics in sealing space outside its sealing space is completely cut off by the way of physical protection and is connect
Touch.
Wherein, in one embodiment, the protective casing 27 is made up of opaque or hard material, and it can resist one
Determine the drilling invasion of degree, any action for destroying the protective casing 27 can all destroy the integrality of the protective casing 27,
And trigger the intrusion detecting unit 26 being arranged on protective casing 27 and produce invasion signal.Meanwhile to the protective casing
The display control unit 21 that 27 destruction can be also destroyed inside the protective casing 27, signal transmission unit 22, bursting tube
One or more in chip 25 and the intrusion detecting unit 26 is managed, and leaves expendable vestige.If it is understood that
The protective casing 27 has openable opening, and its opening is provided with anti-tear-off label, and is provided with intrusion detecting unit
26, if there is disabled user to open the opening, the intrusion detecting unit 26 can be triggered and produce invasion signal.
Wherein, the safety management chip 25 is used for when the intrusion detecting unit 26 does not detect intrusion event,
The encryption key is decrypted according to the private key of storage according to the memory 24 for control, then using the key after decryption
Content source is decrypted, then controls and the content source after decryption is decoded.The display control unit 21 is used for basis
The corresponding display signal of decoded content source output, and by the signal transmission unit 22 by the display signal transmit to
The display screen 23, to cause the display screen 23 to play the content source according to the display signal.
Wherein, the intrusion detecting unit 26 is used for when detecting the protective casing 27 and being invaded, and produces invasion letter
Number to the safety management chip 25.For the safety management chip 25 when receiving the invasion signal, also control produces police
Accuse signal.It is understood that in one embodiment, the caution signal can be to a default telephone number dialing phone or send short
Believe etc., either the content display 20 also includes sound or the warning circuit of display format, and it is receiving warning letter
Number when produce alarm sound or alarm indication, for example warning circuit be the voice output unit for exporting sound, or be for
Flash LED of alarm etc..
Wherein, the safety management chip 25 is additionally operable to detect the intrusion event in the intrusion detecting unit 26
When, cut off the display signal that the signal transmission unit 20 is transmitted and record the intrusion event.
As it was previously stated, the safety management chip 25 gets described pass through in encryption in the content display 20
Behind appearance source and key, also judge whether the intrusion detecting unit 26 detects intrusion event, when the intrusion detecting unit 26
When not detecting intrusion event, the control of safety management chip 25 is using the private key to the encrypted encryption key
Then decryption the encrypted content source is decrypted to obtain using the key after the decryption with the key after being decrypted
Content source after decryption, then control and the content source after decryption is decoded.As it was previously stated, the display control unit 21
Corresponding display signal is exported according to decoded content source, and is transmitted the display signal by the signal transmission unit 22
To the display screen 23, to cause the display screen 23 to play the content source according to the display signal.
Wherein, in one embodiment, the display device 20 also includes random access memory 28, decoder 29 and deciphering module
201, the random access memory 28, decoder 29 and deciphering module 201 are sequentially connected electrically, and the deciphering module 201 is deposited with described
Reservoir 24 connects.The random access memory 28 electrically connects with the display control unit 21, the deciphering module 201 and the solution
Code device 29 also electrically connects with the safety management chip 25.The safety management chip 25 be used for control by the private key store to
The deciphering module 201, and control the deciphering module 201 to read the content source and the encryption from the memory 24
Key, and control the deciphering module 201 to be decrypted according to the private key pair encryption key with the key after being decrypted, so
The content source is decrypted according to the key after decryption afterwards.In certain embodiments, the decoder module 201 can be one only
Vertical deciphering chip.In another embodiment, the decoder module 201 can also be the mould being integrated in safety management chip 25
Block.
The safety management chip 25 simultaneously controls the decoder 29 to decode the content source after the decryption, and will
Decoded content source is temporarily stored in the random access memory 28, and the display control unit 21 is from the random access memory
The content source decrypted and decode is read in 28 and is exported according to the content source decrypted and decode and is shown accordingly
Signal, and transmitted the display signal to the display screen 23 by the signal transmission unit 22, to cause the display
Screen 23 plays the content source according to the display signal.
Wherein, in one embodiment, the private key corresponds with the public key, or the private key and the public key phase
Together.
In one embodiment, the content display 20 also includes battery 30, the battery 30 and the safety management
Chip 25 electrically connects, and the battery 30 is used to power for the safety management chip 25, when the electricity of battery 30 is less than default
When value or the battery 30 lack, the safety management chip 25 is judged as intrusion event, and controls and delete the memory
The private key in content source and/or the memory 24 in 24.It is understood that the battery 30 is arranged at the protective casing 27
Either internally or externally, when the battery 30 is arranged at the inside of the protective casing 27, the battery 30 is arranged at the electricity
On road plate 31.
In one embodiment, the content display 20 also includes being arranged at the circuit board inside the protective casing 27
31.Wherein, the display control unit 21 and the safety management chip 25 are arranged on the circuit board 31.In other implementations
In example, the circuit board 31 can omit.
In one embodiment, the memory 24 is arranged at content or the outside of the protective casing 27.Deposited when described
When reservoir 24 is arranged at the inside of the protective casing 27, the memory 24 is arranged on the circuit board 31.
Fig. 2 is the schematic flow sheet of content safety distribution and display methods in the embodiment of the utility model one.The content
Safety distribution and display methods are applied to display system 100.Methods described includes：
Step S21：When making content to be displayed source, the content to be displayed source is encrypted to obtain in encryption using key
Rong Yuan, and key is encrypted to obtain encryption key using public key, and by encrypted encrypted content source and encryption key one
Play storage.In certain embodiments, the encrypted content source of the encryption and encryption key can be also stored separately.
Step S22：After obtaining the encrypted content source by encryption and encryption key, using a private key to the encryption
Key is decrypted with the key after being decrypted.Specifically, the private key is corresponding or identical with the public key.
Step S23：It is decrypted using the key pair encryption content source after decryption.
Step S24：Content source after decryption is decoded.
Step S25：Produced according to the decoded content source and show signal, and according to playing the display signal
Content source.
Display system 100 of the present utility model effectively protects its content source passing by the encryption of the key to content source
It is not copied in defeated process so that the interests of content production business are effectively protected.
It is apparent to those skilled in the art that for convenience and simplicity of description, the device of foregoing description
Specific work process, may be referred to the corresponding process in preceding method embodiment, will not be repeated here.
It is described above, only specific embodiment of the utility model, but the scope of protection of the utility model is not limited to
This, any one skilled in the art in the technical scope that the utility model discloses, can readily occur in change or
Replace, should all cover within the scope of protection of the utility model.Therefore, the scope of protection of the utility model should be described with right
It is required that protection domain be defined.
Claims (7)
1. a kind of display system with content safety distribution and display function, it is characterised in that the display system includes interior
Holding display device and content generation device, the content display includes display control unit, signal transmission unit and display
Screen, the display control unit are electrically connected by the signal transmission unit with the display screen, and the content display is also
Including safety management chip, protective casing and for detecting the intrusion detecting unit to the intrusion event of the protective casing, institute
State intrusion detecting unit to electrically connect with the safety management chip, the protective casing forms a sealing space, the display control
Unit, signal transmission unit, safety management chip and the intrusion detecting unit housing processed are in the sealing space.
2. display system as claimed in claim 1, it is characterised in that the content display also includes memory, described
Safety management chip electrically connects with the display control unit and the memory respectively.
3. display system as claimed in claim 2, it is characterised in that the content display also include random access memory,
Decoder and deciphering module, the random access memory, decoder and deciphering module are sequentially connected electrically, the deciphering module with it is described
Memory connects, and the random access memory electrically connects with the display control unit, and the deciphering module and the decoder are also
Electrically connected with the safety management chip.
4. display system as claimed in claim 2, it is characterised in that the content display also includes battery, the electricity
Pond electrically connects with the safety management chip, for for the safety management chip power supply.
5. the display system as described in any one of claim 2 to 4, it is characterised in that the intrusion detecting unit includes some
Intrusion detecting circuit, some intrusion detecting circuits are arranged at the inner surface of the protective casing.
6. display system as claimed in claim 5, it is characterised in that each intrusion detecting circuit includes an at least pressure sensing
Device.
7. the display system as described in any one of claim 2 to 4, it is characterised in that the protective casing by opaque or
Hard material is made.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621295211.3U CN206757624U (en) | 2016-11-29 | 2016-11-29 | Display system with content safety distribution and display function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621295211.3U CN206757624U (en) | 2016-11-29 | 2016-11-29 | Display system with content safety distribution and display function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206757624U true CN206757624U (en) | 2017-12-15 |
Family
ID=60607483
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621295211.3U Expired - Fee Related CN206757624U (en) | 2016-11-29 | 2016-11-29 | Display system with content safety distribution and display function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206757624U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115174080A (en) * | 2022-09-07 | 2022-10-11 | 北京安盟信息技术股份有限公司 | Key protection method and device |
-
2016
- 2016-11-29 CN CN201621295211.3U patent/CN206757624U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115174080A (en) * | 2022-09-07 | 2022-10-11 | 北京安盟信息技术股份有限公司 | Key protection method and device |
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Granted publication date: 20171215 |