CN100550736C - A kind of intelligent cipher key equipment with sound-producing device - Google Patents
A kind of intelligent cipher key equipment with sound-producing device Download PDFInfo
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- CN100550736C CN100550736C CNB2006101131848A CN200610113184A CN100550736C CN 100550736 C CN100550736 C CN 100550736C CN B2006101131848 A CNB2006101131848 A CN B2006101131848A CN 200610113184 A CN200610113184 A CN 200610113184A CN 100550736 C CN100550736 C CN 100550736C
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Abstract
The invention discloses a kind of intelligent cipher key equipment with sound-producing device, comprise MCU and sound-producing device, sound-producing device comprises microphone device, directly is connected with MCU, perhaps is connected with MCU by resistance, electric capacity or signal amplifier spare.Microphone device can be selected loud speaker or buzzer for use, and sound-producing device can comprise a serial input or parallel D/A converter module or the speech chip of importing or being connected with the MCU bus.Intelligent cipher key equipment is according to the network far-end or the application demand of host side, the information of utilizing sound-producing device to send can be different at every turn, the information that the prompting user need import has increased equipment fail safe in use, makes the present invention be more suitable for using in public.Utilize sound-producing device can realize functions such as the safety warning of equipment, read-write prompting, operation indicating simultaneously, improved the ease for use of intelligent cipher key equipment, make intelligent cipher key equipment have more hommization.
Description
Technical field
The present invention relates to information security field, relate in particular to a kind of intelligent cipher key equipment.
Background technology
The division in current techniques field is more and more thinner, the research and development in each field is also more and more deep, the people of different field to the technological know-how of other field know very shallow, even the product of other field all felt very strange and mysterious, in the process of manipulating, people require the not only powerful requirement that can satisfy them to various device, and to accomplish to be simple and easy to use, people are also more and more higher to the requirement of the hommization in the various device use simultaneously, and the equipment of point-and-shoot more is subjected to consumer's favor on market.
Sound, image etc. also are embodied in the design of electronic products as the most important means that the mankind exchange.Adopt a speech chip, allow product lift up one's voice, can play and strengthen that propaganda brand, guides user are used, functions such as fault is promptly pointed out, amusement, make product design Nover practical more.
Intelligent cipher key equipment is a kind of crypto key memory, cooperates some peripheral devices to realize its function again by a MCU or intelligent card chip usually.Main control units such as MCU can comprise some IO pins, can comprise interface or some other control pins of serial communication.Intelligent cipher key equipment is applied in Web bank, payment platform, online secorities trading or the like information security field.
When using intelligent cipher key equipment, generally need carry out the checking of user key.But password all is faced with a lot of unsafe situations when using, in case password loss or stolen then can bring a lot of troubles to us.We see the stolen incident of report network cipher through regular meeting; trojan horse; the sense of self-protection difference is by phishing; perhaps password all is the factor that causes the cryptosecurity problem by Brute Force or the like; we are necessary to take the safeguard of some cryptosecurities for this reason, for password on the catch net is set up barrier one.As a kind of product, intelligent cipher key equipment has easy-to-use and requirement hommization equally simultaneously.
The characteristics of combined with intelligent key equipment and the demand for security of user cipher impel us to invent a kind of new device, come the cryptosecurity in the use of better protection intelligent cipher key equipment, improve the ease for use of product, make more hommization of product.
Summary of the invention
The present invention adds a sound-producing device to intelligent cipher key equipment, realizes the functions such as safety warning, read-write prompting, operation indicating of equipment, changes information indicating as required simultaneously, make safety and reliability of the present invention, be simple and easy to usefulness.
Technical scheme of the present invention is as follows: a kind of intelligent cipher key equipment with sound-producing device, comprise MCU and sound-producing device, and described sound-producing device is connected with MCU, and described sound-producing device comprises microphone device.
Described sound-producing device can be closed.
Described microphone device can be selected loud speaker or buzzer for use.
Intelligent cipher key equipment is by USB interface and main-machine communication.
Described microphone device directly is connected with MCU, perhaps is connected with MCU by resistance, electric capacity or signal amplifier spare, and MCU controls described microphone device sounding.
Described sound-producing device comprises the D/A converter module of a serial input, microphone device directly is connected with D/A converter module or is connected with D/A converter module by resistance, electric capacity, amplifier etc., D/A converter module is connected with MCU and by serial mode communication, MCU sends to D/A converter module with output information, control microphone device sounding.
Described sound-producing device comprises the D/A converter module of a parallel input, microphone device directly is connected with D/A converter module or is connected with D/A converter module by resistance, electric capacity, amplifier etc., D/A converter module and MCU be parallel to be connected and by parallel mode communication, MCU sends to D/A converter module with output information, control microphone device sounding.
Described sound-producing device can also comprise a D/A converter module that is connected with the MCU bus, microphone device directly is connected with D/A converter module or is connected with D/A converter module by resistance, electric capacity, amplifier etc., MCU communicates by letter with bus mode with D/A converter module, control microphone device sounding.
Described sound-producing device also can comprise a speech chip, and speech chip is connected with MCU, by MCU speech chip is controlled, and microphone device is connected to the output of speech chip, with the acoustic information output control microphone device sounding that is stored in the speech chip.
Intelligent cipher key equipment sends information according to the needs of data processing by sound-producing device, and main frame sends to intelligent cipher key equipment with the input of the information that receives, and intelligent cipher key equipment is handled described input.Wherein, described information is the information of password input, and intelligent cipher key equipment is done is treated to password authentification.
Intelligent cipher key equipment sends information according to the demand of network far-end or host side application program by sound-producing device, and main frame sends to network remote processor or input main frame with the input of the information that receives and gives application program and use.Wherein, described information is the password of logging in network or the key message of application program, and these information participate in the use of the checking of network far-end logging in network or application program.
The above information can identical or each at every turn difference, is changed with calculation process according to certain rule before sending information by sound-producing device or is done encryption by intelligent cipher key equipment.
Described variation and computing comprise enciphering and deciphering algorithm computing, hash computing, self-defined algorithm computing.
Described variation and computing are RSA, DES, 3DES, HMAC-MD5, TEA and negate, inverted order, XOR etc.
Described sound-producing device can send prompting, the read-write operation indication of greeting information, operation prompt information, fault alarm, affirmation input.
Described sound-producing device can the reporting facility state.
The prompt tone that described sound-producing device sends can ringing for the sound of voice, the tinkle of bells, music, fixed frequency length interval variation, variable frequency.
Compared with prior art, the invention has the beneficial effects as follows:
The present invention adds a sound-producing device on original intelligent cipher key equipment basis, realized safety warning, the functions such as read-write prompting, operation indicating of equipment; Voice suggestion simultaneously makes key message to carry out according to prompting, can accomplish all to change the input information prompting of equipment at every turn, so just reduced the risk that changeless information is intercepted and captured by wooden horse, increased equipment fail safe in use, made that the present invention is more suitable for using in public; In better protection in the cryptosecurity in the intelligent cipher key equipment use, also improve the ease for use of intelligent cipher key equipment, the equipment that makes has more hommization; Play simultaneously and strengthen that propaganda brand, guides user are used, functions such as fault is promptly pointed out, amusement, make product design Nover practical more.
Description of drawings
Fig. 1 is the intelligent cipher key equipment structured flowchart that has sound-producing device;
Fig. 2 is the intelligent cipher key equipment annexation schematic diagram that has speech chip;
Fig. 3 is the intelligent cipher key equipment applicating flow chart one that has sound-producing device;
Fig. 4 is the intelligent cipher key equipment bus mode annexation schematic diagram that has sound-producing device;
Fig. 5 is the intelligent cipher key equipment applicating flow chart two that has sound-producing device;
Fig. 6 has the intelligent cipher key equipment parallel mode annexation schematic diagram of sound-producing device
The direct connection diagram one of Fig. 7 microphone device and MCU;
The direct connection diagram two of Fig. 8 microphone device and MCU;
Fig. 9 has the intelligent cipher key equipment serial mode annexation schematic diagram of sound-producing device.
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in more detail.
Sound-producing device among the present invention can adopt various ways, can be various sound, as: voice suggestion, music or the tinkle of bells etc., microphone device can be selected loud speaker or buzzer etc. for use.
When adopting speech chip, just do not need to revise, can consider to adopt OTP type (disposable programming) sound circuit and mask-type sound circuit if voice content writes the back; If voice content often will be revised, should adopt the audio record circuit of ISD series or APR series.Speech chip is communicated by letter by serial communication interface (SPI or Microwire) with microcontroller.
When adopting buzzer, buzzer be divided into piezoelectric type with two kinds of electromagnetic type, can select to use according to different demands.Buzzer can provide various sound length for product, and height changes prompt tone and caution sound, uses during supply is used.
Loud speaker can provide music and diverse sound, can realize by the coding control of microcontroller to loud speaker.
Be illustrated in figure 1 as the structured flowchart of the intelligent cipher key equipment that has sound-producing device.Wherein, 102 for having the intelligent cipher key equipment of sound-producing device itself, and 103 is main control unit MCU, also can be device extension memory cell and necessary interface unit as required, and interface unit is mainly used in the parsing of the communication protocol of equipment and main frame.104 is sound-producing device.The host side that equipment is connected with main frame is 101.Sound-producing device 104 is subjected to the control of main control unit 103.The sound-producing device 104 here can be the combination of above-mentioned buzzer, loud speaker or they and speech chip, D/A converter module or the like components and parts, also comprises its peripheral circuit certainly.
First embodiment is the application of intelligent cipher key equipment aspect authenticating user identification that has sound-producing device, and sound-producing device directly is connected with MCU, and wherein sound-producing device adopts speech chip.Equipment connecting relation as shown in Figure 2, operating process is as shown in Figure 3.
Among Fig. 2,201 is speech chip ZY1420B, and it directly is connected with MCU Main Processing Unit 103.In ZY1420B, prerecord better information of voice prompt, respectively the paragraph storage of supporting according to chip.By chip the control of B0, B1 pin is realized operation to different sections.The IO pin of MCU also is connected PLAYE and two pins of PLAYL of speech chip, puts low the time when the PLAYE pin, and MCU uses triggering mode to the speech chip Play Control, and the PLAYL pin is put and used level playback control mode low the time.Two pins of the SP+ of speech chip and SP-are speech chip driving pins to devices such as loudspeaker among the figure.VCC positive supply pin connects the IO pin of MCU, and the operation that powers on of speech chip, VSS ground connection are given in control.Other pins of some of speech chip are not described at this.
Among Fig. 3, the intelligent cipher key equipment that will have sound-producing device is connected to main frame 301, equipment receives PIN code checking request 302, equipment is by the control to sound-producing device, make it to export one section voice, the use of user welcome, prompting simultaneously requires user's PIN code of input, equipment sends input prompt information 303 by sound-producing device, inform which kind of information the user need import, equipment is before sending voice prompt, earlier the content that will point out is carried out the variation of computing or other rules, and then send information by sound-producing device, the user is according to information, and through importing PIN code 304 after the suitable variation, application program is transferred to equipment 305 with the user's input that receives, and UC PIN code 306 is if PIN code is correct, the user continues use equipment and application software 308, if the incorrect warning 309 then the user identity mistake is made mistakes.Can export other prompt tone to the control of speech chip this moment by MCU, for example the prompting checking is passed through or failure, the prompting user re-uses after carrying out next step operation or importing correct PIN code, if the user repeatedly PIN code of input error has surpassed the number of times that allows, can also send the alarm sound of makeing mistakes.
Have certain rule here between the prompting of the sound-producing device of mentioning and the correct PIN code, as long as user and equipment are observed the rule of common secret, then this PIN code verification mode is comparatively safe.Be that the information that sound-producing device sends not is the data that the user directly will import PC, the computing rule that intelligent cipher key equipment adopts and the user arranges, for example to the information inverted order, or XOR, data are handled, then as the information of giving the user, thereby the user does corresponding the variation to data and obtains the information that the user should import after obtaining information, the user sends to the data of intelligent cipher key equipment as the PIN code verification with this information that newly calculates by main frame then.Once bright simply for instance to this variation rule.When intelligent cipher key equipment need be 1234 by the information that sound-producing device sends, intelligent cipher key equipment changed these data, and inverted order is changed to 4321, points out by sound-producing device then; The user obtains information by sound-producing device and is 4321, then the user also do identical processing promptly also inverted order handle and to obtain 1234, send to intelligent cipher key equipment and be used for the verification password and use thereby be input to host side with 1234 then.This prompting and account form also can be reduced to the information of direct use prompting as input, generate at random when perhaps Ti Shi information is each the use, have increased the flexibility of using.The information of prompting can change each, even can accomplish it is disposable.Increased the randomness of password greatly, and the user needn't remember the password of equipment at every turn, prevent from simply to cause password setting simply to be easy to be cracked in order to remember.The appearance of voice suggestion has simultaneously increased the novelty and the ease for use of intelligent cipher key equipment, is more suitable for the requirement of present people to the product hommization.
Second embodiment is that the intelligent cipher key equipment that has a sound-producing device is used for a kind of application that logging in network or controlling application program are used.Fig. 4 provides the another kind of inner annexation figure of the intelligent cipher key equipment that has sound-producing device, connects by bus mode between the MCU of intelligent cipher key equipment and the sound-producing device.
In Fig. 4,401 is digital to analog converter DAC0832, sound-producing device 104 by 401 and microphone device constitute, adopt bus mode communication between sound-producing device 104 and the MCU103.Wherein the data/address bus of MCU103 connects the data/address bus of DAC0832, CS is the input select signal of ADC chip, IO mouth control by MCU, when XFER is low, data wire is to the DAC of DAC inside register transfer signal, conversion immediately after the transmission, WR1 be the DAC chip write the selection signal, WR2 is the DAC register write signal of DAC inside and starts conversion that these several pins are all controlled by the IO pin of MCU.Just can export sound such as the tinkle of bells, music from the information of MCU like this by the microphone device that is connected on the analog-digital chip.
In the flow chart shown in Figure 5, the intelligent cipher key equipment that will have sound-producing device is connected to main frame 501, and equipment can send the insertion that graceful the tinkle of bells or music come prompt facility or information such as can use by sound-producing device this moment.The user is at logging in network or when using application software, network or application program send to equipment 502 with some key messages by cryptochannel, equipment carries out encryption 503 to the information of receiving, equipment sends multiple modes such as the mode of voice suggestion or jingle bell or tick number with result by sound-producing device and points out 504 to the user, the information 505 that the user requires according to the prompting of sound-producing device input etc. are pending, wait when equipment can send graceful music or countdown in the pending process stroke to point out user profile just processed.Input information is correct 506, if correctly then the user normally uses network, equipment is pointed out successfully operation and following subsequent operation 507 once more, and the refusing user's of then reporting to the police in the time of authentication failed is used and sent false alarm 508.In this proof procedure, equipment for example can process to encrypt also can not deal with to the information from cryptochannel and send prompting, and the user is input to the information of correspondence after the main frame, and host side can be carried out corresponding processing and for example be deciphered or directly use.
Figure 6 shows that the third embodiment, have between the MCU103 of intelligent cipher key equipment of sound-producing device and the sound-producing device 104 by parallel mode transmission information.601 is digital to analog converter among the figure, analog-digital chip adopts MAX530, be the analog-digital chip of a parallel input voltage output, DI0 connects the IO port of the P0 of MCU to the P1 place respectively to DI7, by to the input that is provided with control data of A0 and A1 with choose.CS is the chip base pin selection, and WR is a write signal, and the respective pin with MCU 103 is connected respectively.The information output of MCU 103 can be converted to analog signal, control microphone device sounding by MAX530 like this.Be connected to a switch among the figure between microphone device and the D/A converter module, this switch can carry out switch control on the guidance panel of equipment, is used for controlling whether close sound-producing device.More than device can be realized and preceding two embodiment identical functions.
Fig. 7 is for sound-producing device passes through resistance, electric capacity is direct and the MCU ways of connecting, wherein the input pin of buzzer connects resistance, electric capacity, and another pin is connected with ground, if in order to guarantee driving force, can draw on the IO1 place connects one, making has enough driving forces.By frequency and the control at interval of sounding length to sounding, can make microphone device send the prompt tone of various fixed frequency length variations or change frequency, for example, two weak point sound of long sound can be set be fault, the length alternating frequency is hurrying or the like for operating of certain value.
Fig. 8 is the direct-connected another kind of mode of sound-producing device and MCU, two pins of buzzer are connected with two IO mouths of MCU respectively, can make two IO pin output differential signals, the bridge-type outputs level signals is controlled the driving to buzzer, make the buzzer sounding, such connected mode can increase driving power.Can realize relatively abundanter voice output by the programming of IO pin being controlled the sound of output simultaneously.
Can utilize pulse modulation technology in addition, generate the level signal meet certain rule and control microphone device, make the microphone device sounding.Microphone device directly is connected with MCU, and MCU comprises PMW (pulse-width modulation) function.So directly be connected microphone device on the MCU and just can send the sound of certain rule, can be provided with according to the instructions for use of intelligent cipher key equipment.Also can realize the simplest application, promptly simply control buzzer and send the sound that ticks, not use any modulation means.
Figure 9 shows that the sound-producing device 104 and the MCU103 serial communication of intelligent cipher key equipment, 901 D/A converter modules wherein for serial input, sound-producing device is converted to level output by data such as DIN, SCLK and clock pin with the control information of MCU103, and the amplification through amplifier can drive the microphone device sounding again.Here can use the analog-digital chip of MAX 541 these serial incoming level outputs, the back connects the MAX495 amplifier.
Fig. 7, Fig. 8 and implementation shown in Figure 9 can realize and preceding two embodiment identical functions equally.
The above execution mode only is the preferred embodiments of the present invention; the invention is not restricted to the foregoing description; for persons skilled in the art; the any conspicuous change of under the prerequisite that does not deviate from the principle of the invention it being done all belongs to the protection range of design of the present invention and claims.
Claims (15)
1. intelligent cipher key equipment with sound-producing device, comprise MCU, it is characterized in that: also comprise sound-producing device, described sound-producing device is connected with MCU, described sound-producing device comprises microphone device, and described intelligent cipher key equipment sends information according to the needs of data processing by sound-producing device, main frame sends to intelligent cipher key equipment with the input of the information that receives, equipment is handled described input, perhaps, described intelligent cipher key equipment is according to the demand of network far-end or host side application program, send information by sound-producing device, main frame sends to network remote processor or input main frame with the input of the information that receives and gives application program and use, wherein said information is at every turn identical or different, and is changed and calculation process according to certain rule before sending information by sound-producing device by intelligent cipher key equipment.
2. the intelligent cipher key equipment of band sound-producing device according to claim 1 is characterized in that: described sound-producing device can be closed.
3. the intelligent cipher key equipment of band sound-producing device according to claim 1 is characterized in that: described microphone device is selected loud speaker or buzzer for use.
4. the intelligent cipher key equipment of band sound-producing device according to claim 1 is characterized in that: intelligent cipher key equipment is by USB interface and main-machine communication.
5. according to the intelligent cipher key equipment of claim 1 or 3 described band sound-producing devices, it is characterized in that: described microphone device directly is connected with MCU, perhaps is connected with MCU by resistance, electric capacity or signal amplifier spare, and MCU controls described microphone device sounding.
6. the intelligent cipher key equipment of band sound-producing device according to claim 1, it is characterized in that: described sound-producing device comprises the D/A converter module of a serial input, microphone device directly is connected with D/A converter module or is connected with D/A converter module by resistance, electric capacity, amplifier, D/A converter module is connected with MCU and by serial mode communication, MCU sends to D/A converter module with output information, control microphone device sounding.
7. the intelligent cipher key equipment of band sound-producing device according to claim 1, it is characterized in that: described sound-producing device comprises the D/A converter module of a parallel input, microphone device directly is connected with D/A converter module or is connected with D/A converter module by resistance, electric capacity, amplifier, D/A converter module and MCU be parallel to be connected and by parallel mode communication, MCU sends to D/A converter module with output information, control microphone device sounding.
8. the intelligent cipher key equipment of band sound-producing device according to claim 1, it is characterized in that: described sound-producing device comprises a D/A converter module that is connected with the MCU bus, microphone device directly is connected with D/A converter module or is connected with D/A converter module by resistance, electric capacity, amplifier, MCU communicates by letter with bus mode with D/A converter module, control microphone device sounding.
9. the intelligent cipher key equipment of band sound-producing device according to claim 1, it is characterized in that: described sound-producing device comprises a speech chip, speech chip is connected with MCU, by MCU speech chip is controlled, microphone device is connected to the output of speech chip, with the acoustic information output control microphone device sounding that is stored in the speech chip.
10. the intelligent cipher key equipment of band sound-producing device according to claim 1, it is characterized in that: described information is the information of password input, intelligent cipher key equipment is done is treated to password authentification, perhaps, described information is the password of logging in network or the key message in the application, and these information participate in the checking of network far-end logging in network or use in the use.
11. the intelligent cipher key equipment of band sound-producing device according to claim 1 is characterized in that: described variation and computing comprise enciphering and deciphering algorithm computing, hash computing, self-defined algorithm computing.
12. the intelligent cipher key equipment of band sound-producing device according to claim 11 is characterized in that: described variation and computing are RSA, DES, 3DES, HMAC-MD5, TEA and negate, inverted order, XOR.
13. the intelligent cipher key equipment of band sound-producing device according to claim 1 is characterized in that: described sound-producing device sends prompting, the read-write operation indication of greeting information, operation prompt information, fault alarm, affirmation input.
14. the intelligent cipher key equipment of band sound-producing device according to claim 1 is characterized in that: described sound-producing device reporting facility state.
15. the intelligent cipher key equipment of band sound-producing device according to claim 1 is characterized in that: the prompt tone of described sound-producing device is the ringing of sound, variable frequency of voice, the tinkle of bells, music, fixed frequency length interval variation.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101131848A CN100550736C (en) | 2006-09-19 | 2006-09-19 | A kind of intelligent cipher key equipment with sound-producing device |
| JP2007241523A JP2008097596A (en) | 2006-09-19 | 2007-09-18 | Intelligent secret key apparatus equipped with sounding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101131848A CN100550736C (en) | 2006-09-19 | 2006-09-19 | A kind of intelligent cipher key equipment with sound-producing device |
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| Publication Number | Publication Date |
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| CN1921393A CN1921393A (en) | 2007-02-28 |
| CN100550736C true CN100550736C (en) | 2009-10-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006101131848A Active CN100550736C (en) | 2006-09-19 | 2006-09-19 | A kind of intelligent cipher key equipment with sound-producing device |
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| JP (1) | JP2008097596A (en) |
| CN (1) | CN100550736C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102629226A (en) * | 2012-02-29 | 2012-08-08 | 深圳市文鼎创数据科技有限公司 | Self-checking method and self-checking device for input device of intelligent secret key equipment |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5911146B2 (en) * | 1981-05-25 | 1984-03-13 | 株式会社三和銀行 | PIN input method and device |
| JPH07296083A (en) * | 1994-04-28 | 1995-11-10 | Oki Electric Ind Co Ltd | Identification number input method and automatic cash transaction machine using same |
| JPH10161846A (en) * | 1996-12-03 | 1998-06-19 | Yazaki Corp | Speech processor and information processing method used for the same |
| JP2002077315A (en) * | 2000-09-04 | 2002-03-15 | Sony Corp | Portable telephone device |
| JP2002162999A (en) * | 2000-11-28 | 2002-06-07 | Sharp Corp | Sound processing system |
| JP2002269047A (en) * | 2001-03-07 | 2002-09-20 | Nec Eng Ltd | Sound user authentication system |
| JP4481519B2 (en) * | 2001-03-22 | 2010-06-16 | 株式会社東芝 | IO device with intelligent HMI function |
| JP2006185060A (en) * | 2004-12-27 | 2006-07-13 | Fujitsu Ltd | Method for inputting password |
-
2006
- 2006-09-19 CN CNB2006101131848A patent/CN100550736C/en active Active
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2007
- 2007-09-18 JP JP2007241523A patent/JP2008097596A/en active Pending
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| JP2008097596A (en) | 2008-04-24 |
| CN1921393A (en) | 2007-02-28 |
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Owner name: FEITIAN TECHNOLOGIES CO., LTD. Free format text: FORMER NAME: BEIJING FEITIAN CHENGXIN TECHNOLOGY CO., LTD. |
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Address after: 100085 Beijing city Haidian District Xueqing Road No. 9 Ebizal building B block 17 layer Patentee after: Feitian Technologies Co., Ltd. Address before: 100083, Haidian District, Xueyuan Road, Beijing No. 40 research, 7A building, 5 floor Patentee before: Beijing Feitian Chengxin Science & Technology Co., Ltd. |