CN105808998B - A kind of fingerprint identification device - Google Patents
A kind of fingerprint identification device Download PDFInfo
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- CN105808998B CN105808998B CN201410855838.9A CN201410855838A CN105808998B CN 105808998 B CN105808998 B CN 105808998B CN 201410855838 A CN201410855838 A CN 201410855838A CN 105808998 B CN105808998 B CN 105808998B
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- fingerprint
- smart card
- microcontroller
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Abstract
The embodiment of the invention discloses a kind of fingerprint identification devices, are applied to fingerprint identification technology field, reduce the risk that finger print information is cracked or reads, improve the safety of user fingerprints information.In the embodiment of the present invention, described device includes fingerprint sensor, smart card and microcontroller；The fingerprint template of prestored user in the smart card, the fingerprint template are encrypted by the first key that smart card generates when first used；The fingerprint sensor, for acquiring the fingerprint image of user and the fingerprint image of acquisition being transmitted to smart card；The smart card, for receiving the fingerprint image of fingerprint sensor acquisition；The microcontroller will be sent to after fingerprint image encryption；Smart card uses different keys from each data transmission of microcontroller；The microcontroller extracts the pattern characteristics of fingerprint image for decrypting the cryptographic fingerprint image of smart card transmission；Finally there is smart card to compare the characteristics of image extracted and fingerprint template to identify fingerprint.
Description
Technical field
The present invention relates to fingerprint identification technology field more particularly to a kind of fingerprint identification devices.
Background technique
Fingerprint is distinctive decorative pattern on finger skin, is made of the crown line on skin.The starting point of these crown lines, end
Point, bifurcated, in conjunction with referred to as details.Whether there is or not any of several arrangements for this minutia of crown line, therefore, everyone finger
Line even a fingerprint every crown line be all it is unique, have irreplaceability identity authentication is therefore carried out by fingerprint
With very high safety.Also the fields such as finance, public security, gate inhibition, residence management are gradually used in.
Since the identification of fingerprint is used for security application field more, guarantee that the safety of finger print information is particularly significant.
And in the prior art during using fingerprint, inadequate to the protection of user fingerprints information, user fingerprints information is non-
The risk that method is read is larger.
Summary of the invention
Since the prior art does not take effective method to user fingerprints information protection, so that the finger print information of user is logical
Cross that route is monitored, software the methods of is cracked and to be stolen, or due to equipment supplier or system Construction quotient the considerations of is inconsiderate, it is interior
Portion personnel have impure motives, and the risk for causing finger print information to leak is higher.In view of this, it is also very desirable to a kind of improved fingerprint knowledge
Other device reduces finger print information quilt to solve the technical issues of user fingerprints information is stolen or is leaked in the prior art
The risk stolen improves the safety of user fingerprints information.
Embodiments of the present invention provide a kind of fingerprint identification device, such as may include:
Fingerprint sensor, smart card and microcontroller；The user fingerprints encrypted by first key are prestored in the smart card
Template；The first key is generated according to the true random number that smart card generates when first used by Encryption Algorithm；Wherein, intelligence
It is interacted before card and data transmission of the every progress of microcontroller by random number and generates temporary key pair, in order to transmission number
According to progress encryption and decryption；
The fingerprint sensor, for acquiring the fingerprint image of user and the fingerprint image of acquisition being transmitted to smart card；
The smart card, for receiving the fingerprint image of fingerprint sensor acquisition；It will be sent after fingerprint image encryption
To the microcontroller；
The microcontroller, for decrypting the cryptographic fingerprint image of smart card transmission, the image for extracting fingerprint image is special
Sign；Smart card will be sent to after described image feature encryption；So that smart card compares characteristics of image and fingerprint template.
Preferably, the fingerprint sensor and the Intelligent card package are integrated.
Preferably, the fingerprint sensor and the smart card fold encapsulation technique by SIP and are packaged as a whole.
Preferably, the fingerprint is adopted and is connected between sensor and smart card by high speed interface.
Preferably, the smart card is also used to update the fingerprint template prestored according to the comparison result of fingerprint template.
Preferably, the microcontroller is high-performance microcontroller.
Preferably, the data in the microcontroller memory are using the encrypted ciphertext form storage of the second key；
Wherein, the second key generation when microcontroller powers on every time, every time on the second key for being electrically generated it is different.
Preferably, after second key carries out decentralized processing by the true random number sent to smart card by microcontroller
The true random number generated with microcontroller is generated by preset algorithm.
As can be seen from the above technical solutions, the embodiment of the present invention has the advantage that
In the embodiment of the present invention, fingerprint template is encrypted be stored in smart card, smart card safety with higher itself
The safety of finger print data can be improved in identification function to a certain extent.In addition, fingerprint template encrypts the first key used
It is that the true random number generated when first used according to smart card is generated by Encryption Algorithm, as at the beginning of smart card can not be known in the external world
It is secondary using the true random number generated, even so system and equipment supplier also have no way of learning the key, and for difference
User for the key it is different, further improve the safety of user fingerprints information storage.Furthermore smart card and micro process
It when device communicates, requires to generate temporary key pair for the transmission of this data every time, encryption and decryption is carried out to data by temporary key.
It is different that the key used is communicated every time, is increased the difficulty that data are cracked, is improved the safety of data transmission.By this reality
The technical solution for applying example offer, reduces the risk that key is cracked, data are read, improves the safety of finger print information.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of fingerprint identification device embodiment in the embodiment of the present invention；
Fig. 2 is the working drawing of Fig. 1 shown device.
Specific embodiment
The embodiment of the invention provides a kind of fingerprint identification devices, can be improved the safety of user fingerprints data, reduce
The risk that finger print data is stolen or is leaked.
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The model that the present invention protects all should belong in member's every other embodiment obtained without making creative work
It encloses.
Refering to fig. 1, a kind of structural schematic diagram of fingerprint identification device embodiment 1 in the embodiment of the present invention, described device can
To include fingerprint sensor 11, smart card 12 and microcontroller 13.Wherein fingerprint sensor 11 and smart card 12 connect, smart card
12 and microcontroller 13 connect.
The user fingerprints template encrypted by first key is prestored in the smart card；The first key is according at the beginning of smart card
The true random number generated when secondary use is generated by Encryption Algorithm；Wherein, smart card and the every data of progress of microcontroller pass
Temporary key pair is generated by random number interaction before defeated, in order to carry out encryption and decryption to transmission data.
Specifically, the fingerprint sensor 11, for acquiring the fingerprint image of user and transmitting the fingerprint image of acquisition
To smart card；
The smart card 12, for receiving the fingerprint image of fingerprint sensor acquisition；It will be sent out after fingerprint image encryption
It send to the microcontroller；
The microcontroller 13 extracts the image of fingerprint image for decrypting the cryptographic fingerprint image of smart card transmission
Feature；Smart card will be sent to after described image feature encryption；So that smart card compares characteristics of image and fingerprint template.
Fingerprint image characteristics described in the present embodiment refer to handled by fingerprint image after in the image that extracts comprising putting into
The point (such as can be with some points of one user fingerprints of complete representation) of information.When fingerprint template refers to by user's typing fingerprint
The data acquisition system that can represent user's finger fingerprint of multiple picture characteristics synthesis.Smart cards for storage fingerprint template use first
Key, which generates the algorithm used, can be some algorithms being commonly used in Current Password, such as AES (Advanced
Encryption Standard, Advanced Encryption Standard) algorithm, the close SM4 algorithm of state etc., it is not especially limited here.In addition, raw
At other than the true random number, can be combined with when first key other auxiliary informations generate, such as smart card root key,
The information such as sequence number.
It should be noted that the communication that smart card is carried out with microcontroller is carried out by the way of " one-time pad ", i.e. intelligence
It can block and data transmission of the every progress of microcontroller is interacted by random number generate temporary key pair before, send data
One end using the encryption key in temporary key to send data encrypt, data receiver using decruption key to data into
Row decryption.For example, smart card sends the fingerprint image of encryption, microcontroller solves fingerprint image with corresponding decruption key
It is close.Likewise, when fingerprint image characteristics are compared with fingerprint template for smart card, microcontroller is by fingerprint image characteristics
It is also required to encrypt characteristics of image by the temporary key generated in real time before sending smart card, smart card is to characteristics of image
It is decrypted, then makees the comparison with fingerprint template.The key that data transmission uses all temporarily generates, and increases data biography
Defeated safety, while reducing the risk that data are cracked.
In the present embodiment, fingerprint template is stored in smart card and from being not read out, and smart card itself has high security,
It can guarantee the safety of fingerprint template to a certain extent.In addition, fingerprint template is encrypted when storing by first key, first key root
It is generated according to the true random number that smart card generates when first used by Encryption Algorithm, the external world can not know smart card for the first time using life
At true random number, even user fingerprints data will not be let out so system and equipment supplier also have no way of learning the key
Dew.Secondly smart card is communicated by the way of " one-time pad " with microprocessor, increases the safety of data transmission, number
Increase according to the difficulty being cracked, the ability enhancing that device reply finger print data is stolen ensure that the safety of finger print information.
On the basis of embodiment 1, it is preferred that user during contacting fingerprint sensor, the angle of contact and
Contact area will form a kind of habit with the time, so smart card when identifying fingerprint, can carry out fingerprint template
It updates, the update may include increasing fingerprint image characteristics, replacement fingerprint image characteristics etc..The replacement fingerprint image can
To be interpreted as, user is possible to larger with the habit gap of later period formation when using the device for the first time, can reduce after replacement micro-
The operation pressure of processor and smart card.
It is connected between the fingerprint sensor and smart card by high speed interface and the two uses SIP (System In
A Package, system in package) folded encapsulation technique is packaged as a whole, and integrated injection molding packaging can be to avoid monitorings sides such as probes
Formula steals finger print data, further increases the Information Security in fingerprint identification process.
The data-handling capacity of smart card is limited, and the processing such as extraction of fingerprint image characteristics carry out within the microcontroller, by
More complicated in the processing of fingerprint image, operand is larger, so selecting high-performance microcontroller (such as STM32F4 system here
Column high-performance microcontroller) carry out fingerprint image processing, the processing capacity and data processing speed of data can be improved.
Microcontroller will handle a large amount of finger print data, can generate a large amount of intermediate data (such as internal storage data), microcontroller
Device improves the safety of these data using ciphertext storage mode, and microcontroller uses these data encryptions of the second key pair, the
The generating mode of two keys is referred to the generating mode of temporary key, and which is not described herein again.Second key is every in microcontroller
Secondary generation when powering on, and every time on the second key for being electrically generated it is different, increase the difficulty that illegal user steals user fingerprints data
Degree.Based on the above-mentioned description to fingerprint identification device, refering to what is shown in Fig. 2, being the work flow diagram of described device.
The above, the above embodiments are merely illustrative of the technical solutions of the present invention, rather than its limitations；Although referring to before
Stating embodiment, invention is explained in detail, those skilled in the art should understand that: it still can be to preceding
Technical solution documented by each embodiment is stated to modify or equivalent replacement of some of the technical features；And these
It modifies or replaces, the spirit and scope for technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of fingerprint identification device characterized by comprising
Fingerprint sensor, smart card and microcontroller；The user fingerprints template encrypted by first key is prestored in the smart card；
The first key is generated according to the true random number that smart card generates when first used by Encryption Algorithm；Wherein, smart card with
Microcontroller is every carry out the transmission of data before temporary key pair generated by random number interaction, in order to transmit data into
Row encryption and decryption；
The fingerprint sensor, for acquiring the fingerprint image of user and the fingerprint image of acquisition being transmitted to smart card；
The smart card, for receiving the fingerprint image of fingerprint sensor acquisition；Institute will be sent to after fingerprint image encryption
State microcontroller；
The microcontroller extracts the characteristics of image of fingerprint image for decrypting the cryptographic fingerprint image of smart card transmission；It will
Smart card is sent to after described image feature encryption；So that smart card compares characteristics of image and fingerprint template；
Wherein, the data in the microcontroller memory are using the encrypted ciphertext form storage of the second key；Described second is close
Key generation when the microcontroller powers on every time, every time on the second key for being electrically generated it is different.
2. the apparatus according to claim 1, which is characterized in that the fingerprint sensor and the Intelligent card package are one
Body.
3. the apparatus of claim 2, which is characterized in that the fingerprint sensor and the smart card are folded by SIP
Encapsulation technique is packaged as a whole.
4. device according to claim 1-3, which is characterized in that the fingerprint is adopted between sensor and smart card
It is connected by high speed interface.
5. the apparatus according to claim 1, which is characterized in that the smart card is also used to the comparison knot according to fingerprint template
Fruit updates the fingerprint template prestored.
6. the apparatus according to claim 1, which is characterized in that the microcontroller is high-performance microcontroller.
7. the apparatus according to claim 1, which is characterized in that second key is by microcontroller by sending out smart card
The true random number that the true random number sent generate after decentralized processing with microcontroller is generated by preset algorithm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855838.9A CN105808998B (en) | 2014-12-31 | 2014-12-31 | A kind of fingerprint identification device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410855838.9A CN105808998B (en) | 2014-12-31 | 2014-12-31 | A kind of fingerprint identification device |
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| CN105808998A CN105808998A (en) | 2016-07-27 |
| CN105808998B true CN105808998B (en) | 2019-06-25 |
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| CN201410855838.9A Active CN105808998B (en) | 2014-12-31 | 2014-12-31 | A kind of fingerprint identification device |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107274534A (en) * | 2017-08-01 | 2017-10-20 | 中控华运（厦门）集成电路有限公司 | Possess the card-type device and corresponding charging device of fingerprint identification function |
| WO2019114813A1 (en) * | 2017-12-14 | 2019-06-20 | 红石生物特征科技有限公司 | Biometric authentication system and method |
| CN110503430A (en) * | 2019-07-15 | 2019-11-26 | 捷德（中国）信息科技有限公司 | Transaction processing method, safety element and smart card |
| CN112464261A (en) * | 2020-11-26 | 2021-03-09 | 深圳市迪安杰智能识别科技有限公司 | Fingerprint data encryption method, fingerprint chip and intelligent terminal |
| CN112866996A (en) * | 2020-12-30 | 2021-05-28 | 广东电网有限责任公司 | Electricity card and electric power data transmission system |
| CN113378136B (en) * | 2021-06-08 | 2022-10-25 | 罗克佳华(重庆)科技有限公司 | Fingerprint identification method and device, password key and storage medium |
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| CN101315675A (en) * | 2007-05-31 | 2008-12-03 | 陆向谦 | Universal smart card and its application system |
| CN201853245U (en) * | 2009-12-09 | 2011-06-01 | 首通云集(北京)投资有限公司 | Intelligent card |
| CN102063612A (en) * | 2010-08-10 | 2011-05-18 | 江苏永驰股份有限公司 | Smart card based fingerprint comparison method |
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| CN105808998A (en) | 2016-07-27 |
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Inventor after: Li Jingjin Inventor before: Hua Yanxiang Inventor before: Li Liang Inventor before: Xing Hongtao Inventor before: Li Zhe |
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Application publication date: 20160727 Assignee: HENGBAO Corp. Assignor: BEIJING HUADA ZHIBAO ELECTRONIC SYSTEM Co.,Ltd. Contract record no.: X2020990000515 Denomination of invention: A fingerprint identification device Granted publication date: 20190625 License type: Common License Record date: 20200923 |