CN1841993A - Method and fingerprint sensor for real-time encryption of fingerprint data - Google Patents
Method and fingerprint sensor for real-time encryption of fingerprint data Download PDFInfo
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- CN1841993A CN1841993A CN 200510033925 CN200510033925A CN1841993A CN 1841993 A CN1841993 A CN 1841993A CN 200510033925 CN200510033925 CN 200510033925 CN 200510033925 A CN200510033925 A CN 200510033925A CN 1841993 A CN1841993 A CN 1841993A
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Abstract
The invention relates to a finger data real time encrypting method and a finger sensor. The sensor comprises a sensing array used to collect each point simulating signal of the corresponding finger, an A/D converter which converts the collected signal into the digital signal, a transmitting interface provides the output channel for each digital signal, a control module which provides the control signal to each function unit by the received condition signal or order; it also comprises an encrypting module which dose encrypting process to the finger digital signal after A/D converting and then transmits it into the transmitting interface.
Description
Technical field the present invention relates to that view data is handled or produces, and the acquisition process of finger print data particularly relates in particular to the real-time encrypted fingerprint sensor of finger print data and the fingerprint identification device of encryption method and this method of use.
The common fingerprint recognition system of background technology comprises fingerprint sensor and processor, fingerprint sensor itself does not have the function of fingerprint recognition, processing, it gathers finger print information, described finger print information is transferred to processor by various interface carries out processing such as identification and matching.Fingerprint identification device is often taked to add security measures such as monitoring probe at its periphery at present, and described equipment especially transducer itself do not have the anti-finger print data technology that is stolen, finger print data is easy to be intercepted in the interface transmission course, in case it pretends to be the fingerprint owner intercepting human, the associative operation that is carried out will endanger this fingerprint owner interests.
Shown in Figure 1 is the structured flowchart of existing fingerprint identification device, by sensor array sampling finger print information, is sent to various interface output after the Data Transmission Controlling cell processing.The Microprocessor Interface of the optional USB interface of described interface, SSI (Synchronous Serial Interface, i.e. synchronous serial interface) interface, SPI (Synchronous Parallel Interface, i.e. synchronous parallel interface) interface or standard.Processor is controlled fingerprint collecting transducer (integrated usually for chip) by these interfaces, and reads the finger print data of this transducer output, processing such as discerns according to these finger print datas again.Described finger print data has the chance that is stolen when transmitting between chip and processor.
The complete image of one piece of fingerprint is considered as a width of cloth, and the finger print data transmission means between existing transducer and the processor generally has following three kinds: the entire image mode, obtain the entire image data; Submap mode, the size that can begin to establish subgraph from the optional position, even can be from a pixel to entire image; The line data mode is mainly transmitted specific several line data.The selection of above-mentioned several modes, processor is realized by the control module (rewriting control register) of sensor internal.But the view data that transducer is exported, all directly the reflection described fingerprint image original contents.
The shortcoming of above-mentioned prior art is: being stolen probably by the finger print data of transducer output is used, thereby reduces the fail safe of fingerprint equipment.
The summary of the invention the technical problem to be solved in the present invention is at above-mentioned the deficiencies in the prior art part, and propose a kind of data to be carried out real-time encrypted fingerprint sensor and method thereof, can be when gathering finger print data with lower cost, described finger print data is carried out encryption, prevent from directly to utilize after this finger print data is stolen, improve the fingerprint equipment fail safe.
For solving the problems of the technologies described above, of the present inventionly be contemplated that substantially: design a kind of fingerprint sensor, the finger print information of gathering is encrypted back output be sent to processor, like this, when even data are stolen at the transducer external interface, can not be used as valid data and directly utilize, thus the data security of raising fingerprint equipment.Utilized the fingerprint equipment of this transducer, also comprised respective processor, can carry out reverse deciphering according to the transducer cipher mode data.
As the first kind of technical scheme that realizes the present invention's design be, a kind of transducer real-time encrypted to finger print data is provided, comprise sensor array, be used to gather the analog signal of corresponding fingerprint each point; A/D converter is a digital signal with the analog signal conversion of being gathered; Coffret is for the each point digital signal provides output channel; Control module, status signal or order according to receiving provide the control signal that is sent to each functional unit; Especially, also comprise encrypting module, will do encryption, be sent to coffret again through the fingerprint digital signal after the A/D conversion.
In the such scheme, described encrypting module comprises cipher key unit and data synthesis unit, and described data synthesis unit will synthesize through the fingerprint digital signal after the A/D conversion with from the data of the cipher key unit algorithm according to appointment, be sent to coffret then.
As the second kind of technical scheme that realizes the present invention's design be, a kind of method real-time encrypted to finger print data is provided, be used for the process that fingerprint sensor is gathered finger print information in real time, step is,
A. the sensor array of transducer is gathered finger print information;
B. described finger print information converts digital signal to through A/D converter;
D. described transducer output and the relevant fingerprint digital signal of sampling fingerprint;
Especially, comprise that also step C. makes data with described fingerprint digital signal and encrypts, be rewritten as the fingerprint digital signal of encryption.
In the such scheme, described step C comprises execution in step again:
A. the cipher key unit of transducer produces when time encryption key, is sent to the data synthesis unit;
B. described fingerprint digital signal is sent to another input of data synthesis unit;
C. described data synthesis unit carries out logical operation to described a plurality of input signals, produces and export the fingerprint digital signal of the encryption relevant with the sampling fingerprint, as signal of sensor.
As the third technical scheme that realizes the present invention's design be, a kind of fingerprint equipment is provided, comprise fingerprint sensor, be used to gather the somatic fingerprint image information; Processor is analyzed the data from transducer, and with memory in content relatively, judge; Especially, described transducer comprises encrypting module, after the somatic fingerprint view data is encrypted, through the coffret output of transducer; Described processor actual figure can receive the view data from transducer according to one's analysis, and produces the decruption key that is used to recover fingerprint image.
Adopt technique scheme, all can make the fingerprint sensor of the lower cost with data in real time encryption function, the somatic fingerprint data that this transducer is exported are difficult for stolen taker directly utilization and the fail safe of raising fingerprint equipment, and are easy to produce realization.
Description of drawings Fig. 1 is the system applies block diagram of existing fingerprint sensor
Fig. 2 is that fingerprint sensor internal signal flow is handled block diagram
Fig. 3 is the fundamental diagram of data synthesis unit
Fig. 4 is that the key of cipher key unit generates schematic diagram
Below the embodiment, the most preferred embodiment shown in is further set forth the present invention in conjunction with the accompanying drawings.
Shown in Figure 2 is the fingerprint sensor signal flow block diagram of the embodiment of the invention, and described transducer is used for the fingerprint information gathering, can carry out real-time encryptedly to data, comprises sensor array, gathers the analog signal of corresponding fingerprint each point; A/D converter is a digital signal with the analog signal conversion of being gathered; Coffret is for the each point digital signal provides output channel; Control module, status signal or order according to receiving provide the control signal that is sent to each functional unit; Unlike the prior art be, also comprise encrypting module, will do encryption through the fingerprint digital signal after the A/D conversion, be sent to coffret again.
Wherein, described encrypting module comprises cipher key unit and data synthesis unit, described data synthesis unit will synthesize through the fingerprint digital signal after the A/D conversion with from the data (hereinafter referred to as encryption key) of the cipher key unit algorithm according to appointment, be sent to coffret then.
Described data are synthetic, it is the logical operation that the fingerprint digital signal and the described encryption key of each fingerprint collecting point are done appointment, comprise XOR, and be shifted, multiply each other, combination or function handle, thereby be rewritten as the fingerprint digital signal of encryption with regard to this finger print data.Fig. 3 is to be a data synthesis unit schematic diagram of example with the XOR.Data_in[7:0 wherein] the fingerprint collecting point multistation digital signal of representative after the A/D conversion, 1fsr[7:0] be encryption key; The two carries out exporting enciphered data behind the step-by-step XOR.This example does not limit the figure place of key and the form of logical operation.Adopting DES (Data EncryptionStandard, the i.e. data encryption standard) method of DSE arithmetic then to comprise transforming function transformation function and data iteration repeatedly, is a kind of typical function and combined treatment, can quote because of prior art, does not give unnecessary details at this.
The multistation digital signal of described each fingerprint collecting point of correspondence can be before being sent to encryption, its data conversion of advanced Xingqi is handled, and as binary conversion treatment, utilizes the two-value of fingerprint gradation data, convert multiple bit digital signal to a bit digital signal, be sent to encrypting module then.
Described encrypting module can also comprise a choice device, as shown in Figure 3, the fingerprint digital signal that is sent to the data synthesis unit is told another road, directly be sent to described choice device, the input again of this choice device receives the signal from described data synthesis unit, from control module! Srceb selects under the signal effect, and described choice device is selected an output with regard to its described two-way input signal.
Described cipher key unit can produce key with shift register, is simple and method that easily realize, and example is seen Fig. 4.Comprise one 32 shift register, produce encryption key; Shift register initial value 1fsr can pre-determine.Can be with 1fsr[0] and 1fsr[1] XOR, this result and 1fsr[21] XOR once more, its result again with 1fsr[31] XOR, produce the input selective value of described shift register; Under valid data En signal controlling from control module, shift register is carried out and is once moved to right, described input value is endowed 1fsr[31], former 1fsr[31] value be endowed 1fsr[30], ..., former 1fsr[1] value be endowed 1fsr[0], thereby obtain new 1fsr numerical value, its least-significant byte can be used as this input data encryption key be sent to data synthesis unit shown in Figure 3.Above-mentioned example does not limit the logical process relation between each bit data of shift register, promptly produces the logical relation of key.
Described cipher key unit can also comprise data storage.The generation of key can use read in memory or the look-up table data or when encrypting by external sync input data and obtain, these methods and related circuit all can obtain from known technology, do not give unnecessary details at this.
Based on the transducer of above-mentioned hardware, in the process of image data, data are carried out real-time encrypted method, comprise step,
A. the sensor array of transducer is gathered finger print information;
B. described finger print information converts digital signal to through A/D converter;
C. described fingerprint digital signal is made data and encrypted, be rewritten as the fingerprint digital signal of encryption.
D. described transducer output and the relevant fingerprint digital signal of sampling fingerprint;
Wherein, the step C as feature of the present invention comprises execution in step again:
A. the cipher key unit of transducer produces when time encryption key, is sent to the data synthesis unit;
B. described fingerprint digital signal is sent to another input of data synthesis unit;
C. described data synthesis unit carries out logical operation to described a plurality of input signals, produces and export the fingerprint digital signal of the encryption relevant with the sampling fingerprint, as signal of sensor.
Wherein, the method that produces when time encryption key of described step a cipher key unit has: use shift register, use when reading in memory or the look-up table data or encryption and import data by external sync.The logical operation of described step c data synthesis unit generated data comprises XOR, and is shifted, multiplies each other or makes up.
Above-mentioned a kind of typical case's utilization of encrypting transducer is a kind of fingerprint identification device, comprises fingerprint sensor, is used to gather the somatic fingerprint image information; Processor is analyzed the data from transducer, and with memory in content relatively, judge; Described transducer comprises encrypting module, after the data encryption of somatic fingerprint image digitization, through the coffret output of transducer; Described processor comprises data analysis module, can receive the signal from transducer, and produces the decruption key that is used to recover fingerprint image; Processor reduces usefulness for further analysis according to this decruption key with the enciphered data deciphering that receives.
Claims (10)
1. a transducer real-time encrypted to finger print data comprises sensor array, is used to gather the analog signal of corresponding fingerprint each point; A/D converter is a digital signal with the analog signal conversion of being gathered; Coffret is for the each point digital signal provides output channel; Control module, status signal or order according to receiving provide the control signal that is sent to each functional unit; It is characterized in that,
Also comprise encrypting module, will do encryption, be sent to coffret again through the fingerprint digital signal after the A/D conversion.
2. the transducer real-time encrypted to finger print data according to claim 1 is characterized in that:
Described encrypting module comprises cipher key unit and data synthesis unit, and described data synthesis unit will synthesize through the fingerprint digital signal after the A/D conversion with from the data of the cipher key unit algorithm according to appointment, be sent to coffret then.
3. the transducer real-time encrypted to finger print data according to claim 2 is characterized in that:
Described data are synthetic, it is the logical operation that the fingerprint digital signal and the described encryption key of each fingerprint collecting point are done appointment, comprise XOR, and be shifted, multiply each other, combination or function handle, thereby this finger print data is rewritten as the fingerprint digital signal of encryption.
4. the transducer real-time encrypted to finger print data according to claim 1 and 2 is characterized in that:
Described encrypting module also comprises choice device; The fingerprint digital signal that is sent to the data synthesis unit is told another road, directly be sent to described choice device, an input again of this choice device receives the signal from described data synthesis unit, under the selection signal effect from control module, described choice device is selected an output with regard to its described two-way input signal.
5. the transducer real-time encrypted to finger print data according to claim 2 is characterized in that,
Described cipher key unit comprises shift register, perhaps data storage.
6. a method real-time encrypted to finger print data is used for the process that fingerprint sensor is gathered finger print information in real time, comprises step:
A. the sensor array of transducer is gathered finger print information;
B. described finger print information converts digital signal to through A/D converter;
D. described transducer output and the relevant fingerprint digital signal of sampling fingerprint;
It is characterized in that, also comprise step
C. described fingerprint digital signal is made data and encrypted, be rewritten as the fingerprint digital signal of encryption.
7. the method real-time encrypted to finger print data according to claim 6 is characterized in that,
Described step C comprises execution in step again:
A. the cipher key unit of transducer produces when time encryption key, is sent to the data synthesis unit;
B. described fingerprint digital signal is sent to another input of data synthesis unit;
C. described data synthesis unit carries out logical operation to described a plurality of input signals, produces and export the fingerprint digital signal of the encryption relevant with the sampling fingerprint, as signal of sensor.
8. the method real-time encrypted to finger print data according to claim 7 is characterized in that:
The method that described step a cipher key unit produces when time encryption key has: use shift register, use when reading in memory or the look-up table data or encryption and import data by external sync.
9. the method real-time encrypted to finger print data according to claim 7 is characterized in that:
The logical operation of described step c data synthesis unit generated data comprises XOR, is shifted, multiplies each other or makes up.
10. a fingerprint identification device comprises fingerprint sensor, is used to gather the somatic fingerprint image information; Processor is analyzed the data from transducer, and with memory in content relatively, judge; It is characterized in that,
Described transducer comprises encrypting module, after the somatic fingerprint view data is encrypted, through the coffret output of transducer;
Described processor actual figure can receive the view data from transducer according to one's analysis, and produces the decruption key that is used to recover fingerprint image.
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| CN 200510033925 CN1841993A (en) | 2005-03-31 | 2005-03-31 | Method and fingerprint sensor for real-time encryption of fingerprint data |
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Cited By (13)
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| CN101030852A (en) * | 2007-01-30 | 2007-09-05 | 天津市阿波罗信息技术有限公司 | Method for enciphering and deciphering human-body safety |
| CN101272245B (en) * | 2007-03-21 | 2011-06-08 | 成都方程式电子有限公司 | Fingerprint characteristic value encrypting/decrypting method and system |
| CN102750513A (en) * | 2011-04-21 | 2012-10-24 | 深圳市新国都技术股份有限公司 | Fingerprint data safety collection method and fingerprint data safety collection device |
| CN102857503A (en) * | 2012-08-31 | 2013-01-02 | 成都国腾实业集团有限公司 | Secure wireless transmission method for fingerprint data |
| CN103053127A (en) * | 2010-08-26 | 2013-04-17 | 罗伯特·博世有限公司 | Method for transmitting sensor data |
| CN105429761A (en) * | 2015-12-29 | 2016-03-23 | 宇龙计算机通信科技(深圳)有限公司 | Key generation method and device |
| US20160197899A1 (en) * | 2015-01-07 | 2016-07-07 | Ememory Technology Inc. | Method of Dynamically Encrypting Fingerprint Data and Related Fingerprint Sensor |
| CN107005577A (en) * | 2017-01-25 | 2017-08-01 | 深圳市汇顶科技股份有限公司 | The processing method and processing unit of finger print data |
| CN107169482A (en) * | 2017-07-07 | 2017-09-15 | 合肥芯福传感器技术有限公司 | One kind encryption phased array fingerprint sensor |
| CN109271830A (en) * | 2017-07-18 | 2019-01-25 | 义隆电子股份有限公司 | Fingerprint sensing integrated circuit |
| CN111225121A (en) * | 2018-11-27 | 2020-06-02 | 上海耕岩智能科技有限公司 | Fingerprint encryption transmission method, fingerprint decryption method, fingerprint encryption transmission device, fingerprint decryption device, storage medium and terminal |
| 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 |
| CN112699358A (en) * | 2020-12-31 | 2021-04-23 | 西南交通大学 | Password safety arrangement based on fingerprint sensor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101030852B (en) * | 2007-01-30 | 2013-08-28 | 天津市阿波罗信息技术有限公司 | Method for enciphering and deciphering human-body safety |
| CN101030852A (en) * | 2007-01-30 | 2007-09-05 | 天津市阿波罗信息技术有限公司 | Method for enciphering and deciphering human-body safety |
| CN101272245B (en) * | 2007-03-21 | 2011-06-08 | 成都方程式电子有限公司 | Fingerprint characteristic value encrypting/decrypting method and system |
| CN103053127A (en) * | 2010-08-26 | 2013-04-17 | 罗伯特·博世有限公司 | Method for transmitting sensor data |
| CN102750513A (en) * | 2011-04-21 | 2012-10-24 | 深圳市新国都技术股份有限公司 | Fingerprint data safety collection method and fingerprint data safety collection device |
| CN102857503A (en) * | 2012-08-31 | 2013-01-02 | 成都国腾实业集团有限公司 | Secure wireless transmission method for fingerprint data |
| CN102857503B (en) * | 2012-08-31 | 2016-01-20 | 成都国腾实业集团有限公司 | A kind of safe finger print data radio transmitting method |
| US20160197899A1 (en) * | 2015-01-07 | 2016-07-07 | Ememory Technology Inc. | Method of Dynamically Encrypting Fingerprint Data and Related Fingerprint Sensor |
| CN106953724A (en) * | 2015-01-07 | 2017-07-14 | 力旺电子股份有限公司 | The method of dynamic encryption formula fingerprint sensor and dynamic encryption finger print data |
| CN105429761B (en) * | 2015-12-29 | 2018-12-25 | 宇龙计算机通信科技(深圳)有限公司 | A kind of key generation method and device |
| CN105429761A (en) * | 2015-12-29 | 2016-03-23 | 宇龙计算机通信科技(深圳)有限公司 | Key generation method and device |
| CN107005577A (en) * | 2017-01-25 | 2017-08-01 | 深圳市汇顶科技股份有限公司 | The processing method and processing unit of finger print data |
| CN107005577B (en) * | 2017-01-25 | 2021-06-25 | 深圳市汇顶科技股份有限公司 | Fingerprint data processing method and processing device |
| US11075759B2 (en) | 2017-01-25 | 2021-07-27 | Shenzhen GOODIX Technology Co., Ltd. | Fingerprint data processing method and processing apparatus |
| CN107169482A (en) * | 2017-07-07 | 2017-09-15 | 合肥芯福传感器技术有限公司 | One kind encryption phased array fingerprint sensor |
| CN109271830A (en) * | 2017-07-18 | 2019-01-25 | 义隆电子股份有限公司 | Fingerprint sensing integrated circuit |
| CN109271830B (en) * | 2017-07-18 | 2022-10-21 | 义隆电子股份有限公司 | Fingerprint sensing integrated circuit |
| CN111225121A (en) * | 2018-11-27 | 2020-06-02 | 上海耕岩智能科技有限公司 | Fingerprint encryption transmission method, fingerprint decryption method, fingerprint encryption transmission device, fingerprint decryption device, storage medium and terminal |
| CN111225121B (en) * | 2018-11-27 | 2022-03-15 | 上海耕岩智能科技有限公司 | Fingerprint encryption transmission method, fingerprint decryption method, fingerprint encryption transmission device, fingerprint decryption device, storage medium and terminal |
| 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 |
| CN112699358A (en) * | 2020-12-31 | 2021-04-23 | 西南交通大学 | Password safety arrangement based on fingerprint sensor |
| CN112699358B (en) * | 2020-12-31 | 2023-10-03 | 西南交通大学 | Application method of password safety protection device based on fingerprint sensor |
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