CN204347841U - A kind of fingerprint identification device - Google Patents
A kind of fingerprint identification device Download PDFInfo
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- CN204347841U CN204347841U CN201420870055.3U CN201420870055U CN204347841U CN 204347841 U CN204347841 U CN 204347841U CN 201420870055 U CN201420870055 U CN 201420870055U CN 204347841 U CN204347841 U CN 204347841U
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Abstract
The utility model embodiment discloses a kind of fingerprint identification device, is applied to fingerprint identification technology field, reduces the risk that finger print information is cracked or reads, and improves the security of user fingerprints information.In the utility model embodiment, described device comprises fingerprint sensor, smart card and microcontroller; The fingerprint template of prestored user in described smart card, the first secret key encryption generated when described fingerprint template is used for the first time by smart card; Described fingerprint sensor, for gathering the fingerprint image of user and the fingerprint image of collection being transferred to smart card; Described smart card, for receiving the fingerprint image that fingerprint sensor gathers; Described microcontroller is sent to by after described fingerprint image encryption; Smart card all uses different keys from the every data transfer of microcontroller; Described microcontroller, for deciphering the cryptographic fingerprint image that smart card sends, extracts the pattern characteristics of fingerprint image; The characteristics of image finally having smart card comparison to extract and fingerprint template are to identify fingerprint.
Description
Technical field
The utility model relates to fingerprint identification technology field, particularly relates to a kind of fingerprint identification device.
Background technology
Fingerprint is distinctive decorative pattern on finger skin, is made up of the crown line on skin.The starting point of these crown lines, terminal, bifurcated, combination are called as details.This minutia of crown line is with or without any of several arrangements, and therefore, everyone fingerprint even every bar crown line of a fingerprint are unique, have irreplaceability, therefore, carry out identity authentication have very high security by fingerprint.Also the fields such as finance, public security, gate inhibition, residence management are used in gradually.
Identification due to fingerprint is used to safety applications field more, therefore ensures that the security of finger print information is very important.And in prior art in the process using fingerprint, inadequate to the protection of user fingerprints information, user fingerprints information is larger by the risk illegally read.
Utility model content
Because prior art does not take effective method to user fingerprints information protection; the methods such as the finger print information of user is monitored by circuit, software cracks are stolen; or inconsiderate due to equipment supplier or system Construction business; internal staff has impure motives, and the risk causing finger print information to leak is higher.In view of this, be starved of a kind of fingerprint identification device of improvement, be stolen to solve user fingerprints information in prior art or by the technical matters revealed, reduce the risk that finger print information is stolen, improving the security of user fingerprints information.
Embodiment of the present utility model provides a kind of fingerprint identification device, such as, can comprise:
Fingerprint sensor, smart card and microcontroller; Prestore by the user fingerprints template of the first secret key encryption in described smart card; The true random number generated when described first key uses for the first time according to smart card is generated by cryptographic algorithm; Wherein, smart card and microcontroller generate temporary key pair alternately by random number before often carrying out a data transfer, so that carry out encryption and decryption to transmission data;
Described fingerprint sensor, for gathering the fingerprint image of user and the fingerprint image of collection being transferred to smart card;
Described smart card, for receiving the fingerprint image that fingerprint sensor gathers; Described microcontroller is sent to by after described fingerprint image encryption;
Described microcontroller, for deciphering the cryptographic fingerprint image that smart card sends, extracts the characteristics of image of fingerprint image; Smart card is sent to by after described characteristics of image encryption; So that characteristics of image and fingerprint template compare by smart card.
Preferably, described fingerprint sensor and described Intelligent card package are integrated.
Preferably, described fingerprint sensor and described smart card are folded encapsulation technique by SIP and are packaged as a whole.
Preferably, described fingerprint is adopted between sensor with smart card and is connected by high speed interface.
Preferably, described smart card also upgrades for the comparison result according to fingerprint template the fingerprint template prestored.
Preferably, described microcontroller is high-performance microcontroller.
Preferably, the ciphertext form of the data acquisition in described microcontroller internal memory after the second secret key encryption stores;
Wherein, the second key generates when microcontroller powers at every turn, and power on the second key difference generated at every turn.
Preferably, the true random number generated with microcontroller after described second key carries out dispersion treatment by microcontroller by the true random number sent smart card is generated by preset algorithm.
As can be seen from the above technical solutions, the utility model embodiment has the following advantages:
In the utility model embodiment, fingerprint template is encrypted to be stored in smart card, and smart card itself has higher safe recognition function, can improve the security of finger print data to a certain extent.In addition, the true random number that the first key that fingerprint template encryption uses generates when being and using for the first time according to smart card is generated by cryptographic algorithm, because the external world cannot know that smart card uses the true random number of generation for the first time, even so system and equipment supplier also have no way of learning this key, and different for this key different users, further increase the security that user fingerprints information stores.Moreover, when smart card and microprocessor communication, all need to generate temporary key pair for this data transfer at every turn, by temporary key, encryption and decryption is carried out to data.The key that each communication uses is different, adds the difficulty that data are cracked, and improves the security of data transmission.By the technical scheme that the present embodiment provides, reduce the risk that key is cracked, data are read, improve the security of finger print information.
Accompanying drawing explanation
Fig. 1 is the structural representation of fingerprint identification device embodiment in the utility model embodiment;
Fig. 2 is the shop drawing of Fig. 1 shown device.
Embodiment
The utility model embodiment provides a kind of fingerprint identification device, can improve the security of user fingerprints data, reduces finger print data and to be stolen or by the risk revealed.
The utility model scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the embodiment of the utility model part, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the utility model protection.
Consult Fig. 1, a kind of structural representation of fingerprint identification device embodiment 1 in the utility model embodiment, described device can comprise fingerprint sensor 11, smart card 12 and microcontroller 13.Wherein fingerprint sensor 11 is connected with smart card 12, and smart card 12 is connected with microcontroller 13.
Prestore by the user fingerprints template of the first secret key encryption in described smart card; The true random number generated when described first key uses for the first time according to smart card is generated by cryptographic algorithm; Wherein, smart card and microcontroller generate temporary key pair alternately by random number before often carrying out a data transfer, so that carry out encryption and decryption to transmission data.
Concrete, described fingerprint sensor 11, for gathering the fingerprint image of user and the fingerprint image of collection being transferred to smart card;
Described smart card 12, for receiving the fingerprint image that fingerprint sensor gathers; Described microcontroller is sent to by after described fingerprint image encryption;
Described microcontroller 13, for deciphering the cryptographic fingerprint image that smart card sends, extracts the characteristics of image of fingerprint image; Smart card is sent to by after described characteristics of image encryption; So that characteristics of image and fingerprint template compare by smart card.
Fingerprint image characteristics described in the present embodiment refers to by the point comprising the information of putting in the image extracted after fingerprint image process (such as can some points of the complete representation user fingerprints).Fingerprint template refer to by repeatedly picture characteristics during user's typing fingerprint synthesize can the data acquisition of representative of consumer finger print.The algorithm that the first secret generating that smart cards for storage fingerprint template uses uses can be some algorithms often used in Current Password, such as AES (Advanced Encryption Standard, Advanced Encryption Standard) algorithm, the close SM4 algorithm of state etc., do not do concrete restriction here.In addition, when generating the first key except described true random number, can also generate in conjunction with other supplementarys, the information such as root key, sequence number of such as smart card.
It should be noted that, the communication that smart card and microcontroller carry out adopts the mode of " one-time pad " to carry out, namely smart card and microcontroller all generate temporary key pair by random number before often carrying out a data transfer alternately, the one end sending data uses the encryption key in temporary key to be encrypted transmission data, and data receiver uses decruption key to decrypt data.Such as, smart card sends the fingerprint image of encryption, and microcontroller is decrypted fingerprint image with the decruption key of correspondence.Same, when smart card is compared to fingerprint image characteristics and fingerprint template, microcontroller also needed the temporary key by generating in real time to be encrypted characteristics of image before fingerprint image characteristics is sent smart card, smart card is decrypted characteristics of image, then does the comparison with fingerprint template.The key that data transmission uses is all interim generation, adds the security of data transmission, reduces the risk that data are cracked simultaneously.
In the present embodiment, fingerprint template to be stored in smart card and to be never read out, and smart card itself has high security, can ensure the safety of fingerprint template to a certain extent.In addition, by the first secret key encryption when fingerprint template stores, the true random number generated when first key uses for the first time according to smart card is generated by cryptographic algorithm, the external world cannot know that smart card uses the true random number of generation for the first time, even so system and equipment supplier also have no way of learning this key, user fingerprints data can not be revealed.Secondly smart card adopts the mode of " one-time pad " to communicate with microprocessor, adds the security of data transmission, and the difficulty that data are cracked increases, and the ability that device reply finger print data is stolen strengthens, and ensure that the safety of finger print information.
On the basis of embodiment 1, preferably, user is in the process of contact fingerprint sensor, the angle of contact and contact area can form a kind of custom along with the time, so smart card is when identification fingerprint, can upgrade fingerprint template, described renewal can comprise increases fingerprint image characteristics, replace fingerprint image characteristics etc.Described replacement fingerprint image can be understood as, and user uses the custom gap likely formed with the later stage during this device comparatively large for the first time, can reduce the computing pressure of microprocessor and smart card after replacement.
Described fingerprint sensor is connected by high speed interface with between smart card and the two adopts SIP (System In a Package, system in package) folded encapsulation technique is packaged as a whole, the injection molding packaging of integration, the listening modes such as probe can be avoided to steal finger print data, improve the data security in fingerprint identification process further.
The data-handling capacity of smart card is limited, the process such as the extraction of fingerprint image characteristics is carried out in microcontroller, due to the process more complicated of fingerprint image, operand is larger, so select high-performance microcontroller (such as STM32F4 series high-performance microcontroller) to carry out the process of fingerprint image, processing power and the data processing speed of data can be improved here.
Microcontroller will process a large amount of finger print datas, a large amount of intermediate data (such as internal storage data) can be produced, microcontroller adopts ciphertext storage mode to improve the security of these data, microcontroller adopts these data encryptions of the second double secret key, the generating mode of the second key with reference to the generating mode of temporary key, can repeat no more here.Second key generates when microcontroller powers at every turn, and the second key difference generated that at every turn powers on, add the difficulty that disabled user steals user fingerprints data.Based on the above-mentioned description to fingerprint identification device, shown in figure 2, it is the work flow diagram of described device.
The above, above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (8)
1. a fingerprint identification device, is characterized in that, comprising:
Fingerprint sensor, smart card and microcontroller; Prestore by the user fingerprints template of the first secret key encryption in described smart card; The true random number generated when described first key uses for the first time according to smart card is generated by cryptographic algorithm; Wherein, smart card and microcontroller generate temporary key pair alternately by random number before often carrying out a data transfer, so that carry out encryption and decryption to transmission data;
Described fingerprint sensor, for gathering the fingerprint image of user and the fingerprint image of collection being transferred to smart card;
Described smart card, for receiving the fingerprint image that fingerprint sensor gathers; Described microcontroller is sent to by after described fingerprint image encryption;
Described microcontroller, for deciphering the cryptographic fingerprint image that smart card sends, extracts the characteristics of image of fingerprint image; Smart card is sent to by after described characteristics of image encryption; So that characteristics of image and fingerprint template compare by smart card.
2. device according to claim 1, is characterized in that, described fingerprint sensor and described Intelligent card package are integrated.
3. device according to claim 2, is characterized in that, described fingerprint sensor and described smart card are folded encapsulation technique by SIP and be packaged as a whole.
4. the device according to any one of claim 1-3, is characterized in that, described fingerprint is adopted between sensor with smart card and is connected by high speed interface.
5. device according to claim 1, is characterized in that, described smart card also upgrades for the comparison result according to fingerprint template the fingerprint template prestored.
6. device according to claim 1, is characterized in that, described microcontroller is high-performance microcontroller.
7. device according to claim 1, is characterized in that, the ciphertext form of the data acquisition in described microcontroller internal memory after the second secret key encryption stores;
Wherein, the second key generates when microcontroller powers at every turn, and power on the second key difference generated at every turn.
8. device according to claim 7, is characterized in that, the true random number generated with microcontroller after described second key carries out dispersion treatment by microcontroller by the true random number sent smart card is generated by preset algorithm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420870055.3U CN204347841U (en) | 2014-12-31 | 2014-12-31 | A kind of fingerprint identification device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420870055.3U CN204347841U (en) | 2014-12-31 | 2014-12-31 | A kind of fingerprint identification device |
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| CN204347841U true CN204347841U (en) | 2015-05-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016202130A1 (en) * | 2015-06-17 | 2016-12-22 | 广州市巽腾信息科技有限公司 | Device for image information collection and encryption method therefor |
| CN106372585A (en) * | 2016-08-29 | 2017-02-01 | 广州御银科技股份有限公司 | Portable fingerprint identification apparatus |
| CN110532749A (en) * | 2019-08-30 | 2019-12-03 | 捷德（中国）信息科技有限公司 | Fingerprint recognition processing unit, method and smart card |
-
2014
- 2014-12-31 CN CN201420870055.3U patent/CN204347841U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2016202130A1 (en) * | 2015-06-17 | 2016-12-22 | 广州市巽腾信息科技有限公司 | Device for image information collection and encryption method therefor |
| CN106372585A (en) * | 2016-08-29 | 2017-02-01 | 广州御银科技股份有限公司 | Portable fingerprint identification apparatus |
| CN110532749A (en) * | 2019-08-30 | 2019-12-03 | 捷德（中国）信息科技有限公司 | Fingerprint recognition processing unit, method and smart card |
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