CN106548122B - Fingerprint sensing integrated circuit and scrambling encryption method thereof - Google Patents
Fingerprint sensing integrated circuit and scrambling encryption method thereof Download PDFInfo
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- CN106548122B CN106548122B CN201510754104.6A CN201510754104A CN106548122B CN 106548122 B CN106548122 B CN 106548122B CN 201510754104 A CN201510754104 A CN 201510754104A CN 106548122 B CN106548122 B CN 106548122B
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- 238000003860 storage Methods 0.000 claims description 8
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/60—Protecting data
- G06F21/602—Providing cryptographic facilities or services
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Abstract
The invention provides a fingerprint sensing integrated circuit and a scrambling encryption method thereof, wherein the scrambling encryption method is to encrypt fingerprint image information before the fingerprint image information is transmitted to a remote system main control end through a transmission interface so as to prevent the fingerprint image information from being recorded or prevent the fingerprint image information which is recorded from being transmitted to the system main control end for judgment.
Description
Technical field
The present invention is related a kind of fingerprint sensing integrated circuit (Integrated Circuit, IC), especially with regard to one
Kind can upset the fingerprint sensing integrated circuit of encryption to fingerprint and its upset encryption method.
Background technique
Existing fingerprint sensing system is that fingerprint sensing and identity identification function are made in same integrated circuit, will
Functional all put same integrated circuit into and can make that the production of circuit system is more not flexible, also has the problem of chip yield.This
Outside, it needs fingerprint sensing to be separated and is arranged respectively at identity identification function user's end and system master in many application aspects
Control end is simultaneously connected with coffret, as shown in Figure 1, when fingerprint sensing IC 13 is sensed and obtains the fingerprint image letter of finger
The information in fingerprint is sent to system master end 15 to recognize and use by breath, a coffret (TX/RX interface) 191
Whether the identity of person is correct.However, information in fingerprint is possible to by side in 191 transmission fingerprint image information of coffret
Record, such as recorded information in fingerprint side to illegal system master using the coffret 193 with 191 same size of coffret
Control end 17.As shown in Fig. 2, the information in fingerprint being logged is stored in a storage device 18, when illegal user's benefit
Fingerprint sensing IC 13 is replaced to send out information in fingerprint via the transmission with 191 same size of coffret with storage device 18
When interface 195 is sent to system master end 15, illegal user can pass through differentiation.Therefore need to information in fingerprint encrypt with
Reinforce the safety of fingerprint transmission.But existing encrypted circuit is limited to the area of fingerprint sensing integrated circuit, it can not be whole
It synthesizes and increases static random access memory (SRAM), dynamic random access memory (DRAM) or fast in the case of single IC
Flash memory designs encrypted circuit.
Summary of the invention
An object of the present invention is that proposing that one kind can upset the fingerprint sensing IC of encryption and its be upset to fingerprint adds
Decryption method solves the problems, such as that data encrypting and deciphering in the prior art and transmission process occur postponing or stop over.
According to the present invention, a kind of fingerprint sensing IC includes that a fingerprint sensing element refers to sense fingerprint and generate one first
Print image information, a linear feedback shift buffer make according to the multiple upset values of initial value generation and a upset encrypted circuit
First information in fingerprint is carried out with multiple upset value to upset second information in fingerprint of the encryption to generate an encryption.
Encrypted circuit is upset, the linear feedback shift buffer and the fingerprint sensing element are connected.Wherein, first information in fingerprint
Data volume it is identical as the data volume of second information in fingerprint, therefore the fingerprint sensing integrated circuit is by second fingerprint image
When carrying out finger print identifying via the system master end that a coffret is sent to distal end as information, data transmission procedure will not be made
At delay or delay.
According to the present invention, a kind of upset encryption method of fingerprint sensing IC includes sensing fingerprint to generate one first fingerprint image
As information, multiple upset values are generated using an initial value, first information in fingerprint is disturbed using multiple upset value
Disorderly encryption is sent to system master end progress fingerprint via the coffret with the second information in fingerprint for generating an encryption
Certification.Wherein, the data volume of first information in fingerprint is identical as the data volume of second information in fingerprint, therefore data
Transmission process not will cause delay or delay.
According to the present invention, a kind of fingerprint sensing IC includes a fingerprint sensing element, a linear feedback shift buffer and one
Upset encrypted circuit.The fingerprint sensing element senses fingerprint and generates one first information in fingerprint, first fingerprint image letter
Breath is divided into multiple sections, each section includes multiple first pixel datas.The linear feedback shift buffer according to wanting at present
Initial value corresponding to the section of encryption generates multiple upset values.The upset encrypted circuit is current to this using multiple upset value
Multiple first pixel datas for the section to be encrypted upset encryption to generate multiple second pixel datas.Upset encryption electricity
Road connects the linear feedback shift buffer and the fingerprint sensing element.Wherein, after multiple section all carries out upset encryption
Generated all second pixel datas form one second information in fingerprint, and the fingerprint sensing integrated circuit is by second fingerprint
Image information carries out finger print identifying via the system master end that a coffret is sent to distal end.First information in fingerprint
Data volume is identical as the data volume of second information in fingerprint, therefore data transmission procedure not will cause delay or delay.
According to the present invention, a kind of upset encryption method of fingerprint sensing IC includes sensing fingerprint to generate one first fingerprint image
As information；First information in fingerprint is divided into multiple sections, each section includes multiple first pixel datas；According to
The section to be encrypted at present provides an initial value；Multiple upset values are generated using the initial value；And utilize multiple upset value
Multiple first pixel data of the section to be encrypted at present is carried out to upset multiple second pixels of the encryption to generate encryption
Data.Wherein, generated all second pixel datas form one second fingerprint after multiple section all carries out upset encryption
Image information, second information in fingerprint are sent to system master end via coffret and carry out finger print identifying.First finger
The data volume of print image information is identical as the data volume of second information in fingerprint, therefore data transmission procedure not will cause and prolong
Late or stop over.
According to above-mentioned specific embodiment, the technical effects of the invention are that without using SRAM, DRAM or flash
Device encrypts fingerprint, therefore does not influence the area of the fingerprint sensing IC after integration, and before encrypted data volume and encryption
Data volume it is identical, therefore data encrypting and deciphering and transmission process not will cause delay or delay.
Detailed description of the invention
Fig. 1 is existing fingerprint identification system；
Fig. 2 shows the mode that the existing information in fingerprint recorded using side is authenticated；
Fig. 3 shows the embodiment of fingerprint sensing integrated circuit of the present invention；
Fig. 4 is the embodiment of linear feedback shift buffer in Fig. 3；
Fig. 5 is that the embodiment of encrypted circuit is upset in Fig. 3；
Fig. 6 shows the first embodiment of initial value generator；
Fig. 7 shows the second embodiment of initial value generator；
Fig. 8 shows the 3rd embodiment of initial value generator；
Fig. 9 shows the fourth embodiment of initial value generator；
Figure 10 shows the first embodiment of the sector division of the first information in fingerprint；
Figure 11 shows the second embodiment of the sector division of the first information in fingerprint；And
Figure 12 shows the 3rd embodiment of the sector division of the first information in fingerprint.
Symbol description:
13 fingerprint sensing chips
15 system master ends
17 violated system main control ends
18 storage devices
191 coffrets
193 coffrets
195 coffrets
20 fingerprint sensing IC
21 fingerprint sensing elements
213 first information in fingerprint
23 linear feedback shift buffers
231 initial values
233 upset values
25 upset encrypted circuit
253 second information in fingerprint
27 coffrets
29 system master ends
31 XOR gates
33 XOR gates
35 XOR gates
37 XOR gates
39 XOR gates
40 initial value generators
41 seeds
43 XOR gates
45 XOR gates
47 XOR gates
49 XOR gates
Specific embodiment
Referring to Fig. 3, it is temporary that fingerprint sensing IC 20 of the invention contains a fingerprint sensing element 21, a linear feedback shift
Storage 23 (linear feedback shift register, LFSR) and a upset encrypted circuit 25.When the hand of user
When referring to touching fingerprint sensing IC 20, fingerprint sensing element 21 senses finger print to generate one first information in fingerprint, linearly
Feedback displacement buffer 23 generates multiple upset values 233 according to an initial value 231, upsets encrypted circuit 25 and uses linear feedback position
It moves the first information in fingerprint 213 that multiple upset values 233 that buffer 23 provides provide fingerprint sensing element 21 and upsets and add
Close the second information in fingerprint 253 for generating encryption, fingerprint sensing IC 20 is again the second information in fingerprint 253 via transmission
Interface 27 is transmitted to system master end 29 and carries out finger print identifying.In this example, though the second information in fingerprint 253 in the transmission by
Side record, if but also can not obtain real fingerprint at system master end without the decoding such as initial value 231 and upset value 233 key, separately
On the one hand, even if the fingerprint of user is obtained from other pipelines, if also can not correctly encrypt without initial value 231 and upset value 233
System master end 29 is sent to via coffret later to be decrypted, thus improves the safety of fingerprint transmission.
Fig. 4 is the embodiment of linear feedback shift buffer 23 in Fig. 3 comprising multiple buffer R0-R15 and multiple
XOR gate (XOR) 31,33,35 and 37.The linear feedback shift buffer 23 of Fig. 3 can use linear polynomial P (x)=x16+x15
+x12+x7+x3+ 1 indicates.For initial value 231 after being loaded into linear feedback shift buffer 23, each position of initial value 231 is each
From storing into corresponding buffer R0-R15, in this embodiment, initial value 231 has 16, in other embodiments, can
Change linear polynomial P (x) on demand to change the kenel of linear feedback shift buffer 23, also changes the position of initial value 231
Number.Linear feedback shift buffer 23 can be displaced the place value stored in buffer R0-R15 according to a clock signal, such as
When the every triggering pulsatile once of clock signal, just once it is displaced, clock signal can be by linear feedback shift buffer 23
The circuit of portion or outside provides.When the linear feedback shift buffer 23 of this embodiment is displaced, XOR gate 37 is according to temporary
Storage R14 and R15 current place value generates place value XOR1, and XOR gate 35 is according to buffer R11 current place value and place value XOR1
Generating place value XOR2, XOR gate 33 generates place value XOR3 according to buffer R6 current place value and place value XOR2, and XOR gate 31
Place value XOR4 is generated according to buffer R2 current place value and place value XOR3 and gives buffer R0, and original place value can position in buffer R0
It moves in next buffer R1, while original place value can be moved in next buffer R2 in buffer R1, according to this class
It pushes away, original place value can all be moved to next buffer R3-R15 in buffer R2-R14.In Fig. 3, the quantity of XOR gate
And the buffer that is connected of its input terminal or XOR gate can change according to demand, i.e. change linear feedback shift is temporary
Furthermore in other embodiments the kenel of device 23 can also replace XOR gate with other logical operation circuits.Due to linear anti-
Feedback displacement buffer has its cyclophysis, therefore in order to avoid there is identical upset value, and is decrypted by backstepping, best limiting displacement
Number.
The linear feedback shift buffer 23 of Fig. 4 before being displaced or carries out at least once after being loaded into initial value 231
After displacement, linear feedback shift buffer 23 provide comprising buffer R0 place value first upset value S0=R0, R1, R2,
R4, R8, R10, R11, R13 }, then using at least once be displaced after, linear feedback shift buffer 23 provide second disturb
Disorderly value S1={ R0, R1, R2, R4, R8, R10, R11, R13 }, and so on, it is every that a upset is generated after being displaced at least once
Value Sn.It in the fig. 4 embodiment, is to select buffer R0, R1, R2, R4, R8, R10, R11, R13 to obtain 8 upset values
Sn, but in other embodiments, other than buffer R0 is necessary, remaining buffer can determine to disturb with unrestricted choice
Disorderly value, and the digit of upset value Sn can also increase or decrease.
Fig. 5 is that the embodiment of encrypted circuit 25 is upset in Fig. 3 comprising XOR gate 39.First information in fingerprint 213 packet
Containing multiple first pixel data PBn, each first pixel data PBn and a upset value Sn are carried out exclusive or fortune by XOR gate 39
Calculate the second pixel data for generating the second information in fingerprint of compositionWherein, n is integer, according to Fig. 4's
The obtained linear equation P (x) of linear feedback shift buffer 23=x16+x15+x12+x7+x3The range of+1, n are 0 to 4095
Integer.As shown in Figures 4 and 5, cipher mode of the invention only needs buffer R0-R15 and logical operation circuit, is not necessarily to
Use SRAM, DRAM or flash memory.In addition the first pixel data PBn before encrypting and encrypted second pixel data Dn
Digit it is identical, be all 8, therefore data count amount before encrypting is identical as encrypted data count amount, processing fingerprint
In the encryption process of image information, the delay (latency) or delay (delay) of data transmission not will cause, and can be smooth
Transmit information in fingerprint in ground (smoothly).
Initial value 231 in Fig. 3, through being provided to fingerprint by coffret after can directly being generated by system master end 29
IC 20 is sensed, can also directly be generated by fingerprint sensing IC 20, or by 20 both sides of system master end 29 and fingerprint sensing IC
Agreement directly generates.Initial value 231 can be fixed value and be also possible to change value, and the fixed needs of initial value 231 are buried in finger
Line senses in IC 20 and the hardware at system master end 29, prevents software from cracking, and is if the initial value 231 changed can then be set
Random fluctuation or condition variation.
Initial value 231 can also generate indirectly other than directly generating.The mode for generating initial value 231 indirectly needs
One or more of seed (seed) is defined, seed is fixed value, can bury the hardware in system master end and fingerprint sensing IC
In, prevent software from cracking, system master end 29 and fingerprint sensing IC 20 all need another linear feedback shift buffer to make
It is initial value generator 40 to generate initial value 231, as shown in Figure 3.In this way, which initial value 231 would not connect in transmission
It is transmitted in mouthfuls 27, replace that initial value 231 transmits in coffret 27 is one group of bit sequence for having specification, therefore illegal user
Bit sequence can only be stolen from coffret, be unable to get correct initial value 231.Bit sequence can be determined by system master end 29
Justice is transmitted to fingerprint sensing IC 20, can also be defined by fingerprint sensing IC 20 and be transmitted to system master end 29, can be with mutual agreement
Mutually transmitting later.The mode of mutual agreement be 29 1 group information of system master end is transmitted to by fingerprint sensing IC 20, such as
00000001, simultaneity factor main control end 29 is also transmitted to another group information of fingerprint sensing IC20, such as 10000000, system master end
29 will obtain a bit sequence, such as 10000001 after this two group informations permutation and combination or operation with fingerprint sensing IC 20.System master
After controlling end 29 and the synchronous acquirement bit sequence of fingerprint sensing circuit 20,20 both sides of system master end 29 and fingerprint sensing IC
Respective initial value generator 40 is selected seed according to this bit sequence and is displaced to generate initial value 231, system master
The initial value for holding 29 and fingerprint sensing IC, 20 both sides to generate must be consistent.The initial value generator 40 at system master end 29 can
With with hardware realization, to avoid specification bit sequence format be known after, pushed back to obtain seed.
The information of bit sequence includes the seed of shift number and selection, by taking 16 bit sequences as an example, 2 of front to
Seed is selected, subsequent 14 represent the shift number of initial value generator 40, assume there are 4 seeds in this instance: 16 '
H5500,16 ' h5400,16 ' h0020,16 ' h0080, and bit sequence is if 16 ' hC800, wherein 16 ' represent 16 units, h generation
The subsequent data of table are 16 scales, therefore 16 ' hC800 of bit sequence is expressed as 1100100000000000 with 2 carries, front two
11 represent and take the 4th 16 ' h0080 of seed, and then 14 then represent displacement 2048 times, so system master end 29 and referring to
Consistent initial value can be obtained through this running in the initial value generator 40 of line sensing 20 both sides of IC.
Fig. 6 shows the first embodiment of initial value generator 40 comprising multiple buffer G0-G15 and multiple exclusive or
Door 43,45 and 47.It is generated being selected one of seed 41 to be loaded into initial value from preset multiple seeds according to a bit sequence
After device 40, seed 41 includes that multiple place values are stored respectively to buffer G0-G15, then again according to displacement set by bit sequence
Initial value 231 is generated after number displacement.The displacement operation of the initial value generator 40 of Fig. 6 and the linear feedback shift of Fig. 4 are temporary
Device 23 is identical, and the position of buffer G0-G14 can be moved to next buffer G1-G15, and XOR gate 43,45 and 47 is temporary according to part
Storage G3, G8, G11 and G14 current place value generates new place value NB0 to buffer G0.In other embodiments, buffer
The quantity of G0-G15 can change, and the quantity of XOR gate 43,45 and 47 and position are also that can change, furthermore exclusive or
Other logical operation circuits can be used also to replace in door 43,45 and 47.
In addition several positions of initial value 231 can also be set as preset fixed value, it is not temporary by linear feedback shift
The Influence of Displacement of device 40, pushes back to avoid software.Fig. 7 shows the second embodiment of initial value generator 40, and the circuit of Fig. 7 is similar
Fig. 6, difference are that the position of buffer G15 can't export the last one position as initial value 231, but with preset fixation
It is worth the last one position of " 0 " as initial value 231.In the example of figure 7, it is default for only setting a position of initial value 231
Fixed value can also set in initial value 231 more than one position as preset fixed value in other embodiments.
It, can also be with arithmetic section buffer G0- other than several positions of initial value 231 are set as preset fixed value
Place value in G15 generates one of position of the certain bits as initial value.Fig. 8 shows that the third of initial value generator 40 is implemented
Example, it is similar with the circuit of Fig. 6, the difference is that the initial value generator 40 of Fig. 8 not uses the position of buffer G15 as initial
The last one position of value 231, and will be generated after the place value progress XOR operation of buffer G3 and G15 using XOR gate 49 specific
The last one position of position Kn as initial value 231.The specified of certain bits Kn can be stylized, such as is this time specified buffer G3
And the position of G15 generates certain bits Kn, but when next time generates initial value again, can change the position of specified buffer G2 and G8 to generate
Certain bits Kn.In other embodiments, other logical operation circuits can be used also to replace in XOR gate 49.
Fig. 9 shows the fourth embodiment of initial value generator 40, difference buffer in Fig. 9 similar with the circuit of Fig. 8
Corresponding position of the position of G0-G3 in initial value 231 is changed, and wherein the position of buffer G0-G2 is respectively as initial value 231
Second, third and the 4th, and the position of buffer G3 is then used as first position of initial value 231.
First information in fingerprint 213 is encrypted after being divided into multiple sections using different initial values 231, and one
A possibility that whole image is illegally decrypted can be reduced, the period of linear feedback shift buffer on the other hand can also be met
The limitation of characteristic.Figure 10 shows first information in fingerprint 213 with 160 × 160 pixel datas, wherein every 10 row connects
Continuous pixel data is a section, and each section is respectively encrypted using upset value Sn caused by different initial values 231, example
If section 0 uses initial value 0, section 1 uses initial value 1, and so on.
Figure 11 shows another dividing method of the first information in fingerprint 213, believes with the first fingerprint image of Figure 10
Breath 213 includes equally 160 × 160 pixel datas, and in this embodiment, the first information in fingerprint 213 is divided into 16
Section is encrypted using different initial values 231, but in section the line number of pixel data be it is discontinuous, such as section 0 the 0th
The 0th row pixel data in the first information in fingerprint of behavior 213, in the 1st the first information in fingerprint of behavior 213 of section 0
The 16th row pixel data, the 32nd row pixel data in the 2nd the first information in fingerprint of behavior 213 of section 0, with such
It pushes away.The line number of pixel data in i.e. same section is equidistant dispersion in the first information in fingerprint 213.
Figure 12 shows another dividing method of the first fingerprint image information 213, in this embodiment, the first fingerprint image letter
160 × 160 pixel datas of breath 213 are divided into 16 40 × 40 section 0-15, this 16 section 0-15 are respectively used
Upset value Sn caused by different initial value 0-15 is encrypted, such as section 0 uses initial value 0, and section 1 uses initial value 1,
The rest may be inferred.
Above for being stated as the purpose illustrated made by presently preferred embodiments of the present invention, and it is not intended to limit of the invention accurate
Ground is disclosed form, learn based on above introduction or from the embodiment of the present invention and make an amendment or change be it is possible,
Embodiment is to explain the principle of the present invention and those skilled in the art is allowed to utilize the present invention in practical application with various embodiments
It above selects and narration, technical idea attempt of the invention is determined by claim and its equal transformation.
Claims (40)
1. a kind of fingerprint sensing integrated circuit, which is characterized in that the fingerprint sensing integrated circuit includes:
One fingerprint sensing element, to sense fingerprint and generate one first information in fingerprint；
One linear feedback shift buffer generates multiple upset values according to the initial value inputted；And
One upsets encrypted circuit, connects the linear feedback shift buffer and the fingerprint sensing element, is worth using multiple upset
First information in fingerprint is carried out to upset second information in fingerprint of the encryption to generate an encryption；
Wherein, the data volume of first information in fingerprint is identical as the data volume of second information in fingerprint, and this refers to
Line senses integrated circuit and carries out second information in fingerprint via the system master end that a coffret is sent to distal end
Finger print identifying.
2. fingerprint sensing integrated circuit as described in claim 1, which is characterized in that first information in fingerprint includes multiple
First pixel data, second information in fingerprint include multiple second pixel datas, and multiple upset value is respectively to multiple
First pixel data carries out upsetting multiple second pixel data of encryption generation.
3. fingerprint sensing integrated circuit as described in claim 1, which is characterized in that the upset encrypted circuit includes an exclusive or
Door.
4. fingerprint sensing integrated circuit as described in claim 1, which is characterized in that the initial value is by the system master end
It provides, or is provided by the fingerprint sensing integrated circuit, or reached an agreement on by the system master end and the fingerprint sensing integrated circuit
Operation generates.
5. fingerprint sensing integrated circuit as described in claim 1, which is characterized in that the fingerprint sensing integrated circuit further includes
One initial value generator generates the initial value.
6. fingerprint sensing integrated circuit as claimed in claim 5, which is characterized in that the initial value generator includes another linear
Feedback displacement buffer is to generate the initial value.
7. fingerprint sensing integrated circuit as claimed in claim 5, which is characterized in that the initial value generator is according to a bit sequence
From preset multiple seeds selection one of them, and the shift number determined according to the bit sequence to selected seed into
Line position is moved to generate the initial value.
8. fingerprint sensing integrated circuit as claimed in claim 7, which is characterized in that the bit sequence is integrated by the fingerprint sensing
Circuit provides, or is provided by the system master end, or is produced by the system master end and fingerprint sensing integrated circuit agreement
It is raw.
9. fingerprint sensing integrated circuit as claimed in claim 5, which is characterized in that the initial value be made of multiple positions, and
Multiple a part is preset fixed value.
10. fingerprint sensing integrated circuit as claimed in claim 5, which is characterized in that the initial value generator includes multiple temporary
The place value that storage, wherein at least two buffers are stored is after logical operation as one of position of the initial value.
11. fingerprint sensing integrated circuit as claimed in claim 5, which is characterized in that the initial value generator includes one temporary
Device, one of position of the place value which is stored as the initial value.
12. fingerprint sensing integrated circuit as described in claim 1, which is characterized in that first information in fingerprint is divided into more
A section, multiple upset value according to caused by the different initial values upset encryption to generate to multiple section respectively
Second information in fingerprint.
13. a kind of upset encryption method of fingerprint sensing integrated circuit, which is characterized in that the fingerprint sensing integrated circuit is passed through one
Defeated interface connects a system master end, which includes the following steps:
Fingerprint is sensed to generate one first information in fingerprint；
Multiple upset values are generated using an initial value；And
First information in fingerprint is carried out using multiple upset value to upset second fingerprint image of the encryption to generate an encryption
Finger print identifying is carried out as information is sent to the system master end via the coffret；
Wherein, the data volume of first information in fingerprint is identical as the data volume of second information in fingerprint.
14. upsetting encryption method as claimed in claim 13, which is characterized in that this is using multiple upset value to first finger
Print image information carries out the step of upsetting encryption including the use of multiple upset value respectively to the more of first information in fingerprint
A first pixel data, which carries out upsetting encryption, generates multiple second pixel datas, wherein multiple second pixel data constitute this
Two information in fingerprint.
15. upsetting encryption method as claimed in claim 13, which is characterized in that this is using multiple upset value to first finger
Print image information carry out upset encryption the step of include carrying out upset encryption using XOR operation.
16. upsetting encryption method as claimed in claim 13, which is characterized in that the upset encryption method further includes being by this
System main control end provides the initial value, or provides the initial value by the fingerprint sensing integrated circuit, or by the system master end
The initial value is generated with fingerprint sensing integrated circuit agreement operation.
17. upsetting encryption method as claimed in claim 13, which is characterized in that the upset encryption method further includes utilizing one
Bit sequence selects one of them from preset multiple seeds, and the shift number determined according to the bit sequence is to selected
Seed is displaced to generate the initial value, and wherein the bit sequence is to be provided by the fingerprint sensing integrated circuit, or be by this
Main control end of uniting provides, or is generated by the system master end and fingerprint sensing integrated circuit agreement.
18. upsetting encryption method as claimed in claim 17, which is characterized in that the upset encryption method further includes using packet
The initial value generator of the buffer containing linear feedback shift provides the initial value.
19. upsetting encryption method as claimed in claim 18, which is characterized in that the upset encryption method further includes that this is first
A part of position of initial value is set as preset fixed value.
20. upsetting encryption method as claimed in claim 18, which is characterized in that the upset encryption method further includes that this is first
The place value that at least two buffers in initial value generator are stored is after logical operation as one of position of the initial value.
21. upsetting encryption method as claimed in claim 18, which is characterized in that the upset encryption method further includes that this is first
One of position of the place value that a buffer in initial value generator is stored as the initial value.
22. as claimed in claim 13 upset encryption method, which is characterized in that it is described using multiple upset value to this first
Information in fingerprint carries out the step of upsetting encryption including being divided into multiple sections respectively by not first information in fingerprint
Multiple upset value caused by the same initial value carries out upset encryption.
23. a kind of fingerprint sensing integrated circuit, which is characterized in that the fingerprint sensing integrated circuit includes:
One fingerprint sensing element, to sense fingerprint and generate one first information in fingerprint, first information in fingerprint point
At multiple sections, each section includes multiple first pixel datas；
One linear feedback shift buffer generates multiple upset values according to initial value corresponding to the section to be encrypted at present；With
And
One upsets encrypted circuit, connects the linear feedback shift buffer and the fingerprint sensing element, is worth using multiple upset
Upset encryption to multiple first pixel datas of the section to be encrypted at present to generate multiple second pixel datas；
Wherein, generated all second pixel datas form one second fingerprint image after multiple section all carries out upset encryption
As information, the data volume of first information in fingerprint is identical as the data volume of second information in fingerprint, and the fingerprint
Sensing integrated circuit refers to second information in fingerprint via the system master end that a coffret is sent to distal end
Line certification.
24. fingerprint sensing integrated circuit as claimed in claim 23, which is characterized in that the upset encrypted circuit includes an exclusive or
Door.
25. fingerprint sensing integrated circuit as claimed in claim 23, which is characterized in that the initial value is by the system master
End provides, or is provided by the fingerprint sensing integrated circuit, or is assisted by the system master end and the fingerprint sensing integrated circuit
Determine operation generation.
26. fingerprint sensing integrated circuit as claimed in claim 23, which is characterized in that the fingerprint sensing integrated circuit also wraps
It includes an initial value generator and generates the initial value.
27. fingerprint sensing integrated circuit as claimed in claim 26, which is characterized in that the initial value generator includes another line
Property feedback displacement buffer to generate the initial value.
28. fingerprint sensing integrated circuit as claimed in claim 26, which is characterized in that the initial value generator is according to a sequence
Column one of selection from preset multiple seeds, and the shift number determined according to the bit sequence is to selected seed
It is displaced to generate the initial value.
29. fingerprint sensing integrated circuit as claimed in claim 28, which is characterized in that the bit sequence is by the fingerprint sensing collection
It provides at circuit, or is provided by the system master end, or reached an agreement on by the system master end and the fingerprint sensing integrated circuit
It generates.
30. fingerprint sensing integrated circuit as claimed in claim 26, which is characterized in that the initial value is made of multiple positions,
And multiple a part is preset fixed value.
31. fingerprint sensing integrated circuit as claimed in claim 26, which is characterized in that the initial value generator includes multiple temporary
The place value that storage, wherein at least two buffers are stored is after logical operation as one of position of the initial value.
32. fingerprint sensing integrated circuit as claimed in claim 26, which is characterized in that the initial value generator includes one temporary
Device, one of position of the place value which is stored as the initial value.
33. a kind of upset encryption method of fingerprint sensing integrated circuit, which is characterized in that the fingerprint sensing integrated circuit is passed through one
Defeated interface connects a system master end, which includes the following steps:
Fingerprint is sensed to generate one first information in fingerprint；
First information in fingerprint is divided into multiple sections, each section includes multiple first pixel datas；
An initial value is provided according to the section to be encrypted at present；
Multiple upset values are generated using the initial value；And
Upset encryption using multiple first pixel data of multiple upset value to the section to be encrypted at present to produce
Multiple second pixel datas of raw encryption；
Wherein, generated all second pixel datas form one second fingerprint image after multiple section all carries out upset encryption
As information, the data volume of first information in fingerprint is identical as the data volume of second information in fingerprint, and this second
Information in fingerprint is sent to the system master end via the coffret and carries out finger print identifying.
34. upsetting encryption method as claimed in claim 33, which is characterized in that this wants this using multiple upset value at present
Multiple first pixel data of the section of encryption carry out upset encryption the step of include carrying out upset encryption using XOR operation.
35. upsetting encryption method as claimed in claim 33, which is characterized in that the upset encryption method further includes being by this
System main control end provides the initial value, or provides the initial value by the fingerprint sensing integrated circuit, or by the system master end
The initial value is generated with fingerprint sensing integrated circuit agreement operation.
36. upsetting encryption method as claimed in claim 33, which is characterized in that the upset encryption method further includes utilizing one
Bit sequence selects one of them from preset multiple seeds, and the shift number determined according to the bit sequence is to selected
Seed is displaced to generate the initial value, and wherein the bit sequence is to be provided by the fingerprint sensing integrated circuit, or be by this
Main control end of uniting provides, or is generated by the system master end and fingerprint sensing integrated circuit agreement.
37. upsetting encryption method as claimed in claim 36, which is characterized in that the upset encryption method further includes using packet
The initial value generator of the buffer containing linear feedback shift provides the initial value.
38. upsetting encryption method as claimed in claim 37, which is characterized in that the upset encryption method further includes that this is first
A part of position of initial value is set as preset fixed value.
39. upsetting encryption method as claimed in claim 37, which is characterized in that the upset encryption method further includes that this is first
The place value that at least two buffers in initial value generator are stored is after logical operation as one of position of the initial value.
40. upsetting encryption method as claimed in claim 37, which is characterized in that the upset encryption method further includes that this is first
One of position of the place value that a buffer in initial value generator is stored as the initial value.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
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| TW104130768A TWI579774B (en) | 2015-09-17 | 2015-09-17 | Fingerprint Sensing Integral Circuit and Its Disturbing Encryption Method |
| TW104130768 | 2015-09-17 |
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| TWI666569B (en) * | 2017-04-19 | 2019-07-21 | 映智科技股份有限公司 | Bridge chip and fingerprint encryption method applied between fingerprint sensor and main control terminal, fingerprint detection and encryption circuit and method |
| TWI635413B (en) * | 2017-07-18 | 2018-09-11 | 義隆電子股份有限公司 | Fingerprint sensing integrated circuit |
| TWI651626B (en) * | 2017-11-30 | 2019-02-21 | 大陸商北京集創北方科技股份有限公司 | Biometric data encryption method and information processing device using same |
| TWI648664B (en) * | 2017-11-30 | 2019-01-21 | 大陸商北京集創北方科技股份有限公司 | Display screen with security unit, display device and information processing device |
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| CN106548122A (en) | 2017-03-29 |
| TWI579774B (en) | 2017-04-21 |
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