An optical PUF identity authentication system based on electromagnetic effect

Abstract

The present invention relates to the field of information security and identity authentication technology, and in particular to an optical PUF identity authentication system based on electromagnetic effect, including at least one PUF authentication system and a PC central control system; the PUF authentication system includes a PUF authentication card, a PUF authentication terminal and a safety lock, and the PUF authentication card includes an upper sealing plate, a PMMA upper clamping plate, a PMMA lower clamping plate, a circuit layer plate and a lower sealing plate stacked in sequence; the PC central control system includes a PC controller, which is electrically connected to the PUF authentication terminal and the safety lock, and the PC controller is also connected to a CRP memory and an alarm system. In the present invention, each group of stimulus response pairs is deleted by the system after being used once, truly achieving "one-time one-password" and having unpredictable characteristics; the authentication card of the present invention can be dual-identified, including identity recognition of the card and image recognition of the stimulus response pair, and has the characteristics of special card for special use.

Description

Technical Field

[0001] The present invention relates to the technical field of information security and identity authentication, and in particular to an optical PUF identity authentication system based on electromagnetic effect. Background Art

[0002] With the rapid development of communication technology, identity authentication systems that generate keys by algorithm and use near field sensing (NFC) as keys have become the mainstream products. However, with the substantial improvement of computer computing power, encryption by algorithm is easy to be cloned, so it is challenged. For example, studies have proven that mathematical hash functions can be cracked. Therefore, it is urgent to study new identity authentication methods and tools.

[0003] Physical Unclonable Functions (PUF) are physical entities that introduce randomness during the manufacturing process. Since their random physical differences have the natural characteristics of being difficult to clone or forge, it is very difficult to completely control the micron and nanometer manufacturing differences in the physical medium. Therefore, the physical unclonable function (PUF) based on the random differences of physical entities eliminates the risk of key duplication from a physical level and becomes the frontier direction of identity authentication research.

[0004] At present, the research on PUF mainly focuses on electronic PUF and optical PUF. Electronic PUF is realized by introducing random differences in the process of integrated circuit manufacturing, such as static random access memory (SRAMPUF) based on voltage divider circuit unit and arbiter PUF (APUF) based on delay unit. However, this type of PUF can be predicted by combining digital template attack and side channel attack. It is convenient to use but has low security. Optical PUF is realized based on the unique response generated by the interaction between light and specific physical structures. For example, optical fiber PUF designed based on slight differences in the material or refractive index of optical fiber and optical waveguide PUF designed based on slight inhomogeneity in integrated optical circuit. However, optical PUF is sensitive to environmental changes (such as temperature and humidity), which may reduce the stability of the response and affect the accuracy of identity authentication. Summary of the invention

[0005] In order to overcome the technical defects of low security of existing electronic PUF and the fact that optical PUF is more sensitive to changes in temperature or humidity in the environment, resulting in reduced stability, the present invention provides an optical PUF identity authentication system based on electromagnetic effect. The electromagnetic PUF made by using electromagnetic properties and some optical properties has the characteristics of high security, high stability, low cost, and easy mass production.

[0006] The present invention provides an optical PUF identity authentication system based on electromagnetic effect, comprising at least one PUF verification system and a PC central control system; the PUF verification system comprises a PUF authentication card, a PUF verification terminal and a safety lock, the PUF authentication card comprises an upper sealing plate, a PMMA upper clamping plate, a PMMA lower clamping plate, a circuit layer plate and a lower sealing plate which are stacked in sequence,

[0007] The upper sealing plate is embedded with an identity information chip, and the upper sealing plate is also provided with a first window;

[0008] The lower surface of the PMMA upper clamping plate is provided with a plurality of upper hemispherical grooves arranged in an array, and the upper surface of the PMMA lower clamping plate is provided with a plurality of lower hemispherical grooves arranged in an array, and the upper hemispherical grooves and the lower hemispherical grooves are respectively positioned correspondingly to form a spherical cavity array, and the spherical cavity array is located in a range directly facing the first window, and a magnetic ball is movably installed in the spherical cavity, and the outer surface of the magnetic ball is divided into two parts, one part of which is sprayed with a fluorescent coating, and the other part is sprayed with a non-fluorescent coating;

[0009] The circuit layer board is provided with a left wiring terminal and a right wiring terminal, each of which includes twenty wiring ports, and the left wiring ports and the right wiring ports are randomly paired and connected by wires and correspond one to one. The circuit layer board is also provided with a resin sealing layer for fixing the wires;

[0010] The lower sealing plate is provided with a plurality of bottom wiring ports which respectively correspond to and are electrically connected to the wiring ports of the circuit layer plate;

[0011] The PUF verification end includes a chip identifier, a card-inserting box body, and a light excitation and signal acquisition system. The card-inserting box body is provided with a card slot adapted to the PUF authentication card. The chip identifier is used to identify the PUF authentication card and is fixed to the front side of the card slot. A multi-port programmable power supply corresponding to and electrically connected to the bottom wiring ports on the PUF authentication card is provided on the rear side wall of the card slot; a second window connected to the card slot is provided on the front side wall of the card-inserting box body, and the spherical cavity array is located in the range facing the second window. The light excitation and signal acquisition system includes an illumination system and a CCD camera. The light of the illumination system is irradiated from the second window to the PUF authentication card, and the reflected light of the PUF authentication card passes through the second window and is reflected back to the CCD camera;

[0012] The PC central control system includes a PC controller, which is electrically connected to the PUF verification end and the safety lock, and is also connected to a CRP memory and an alarm system; each PUF authentication card has multiple groups of stimulus response pairs, and all stimulus response pairs of the same PUF authentication card are saved in the corresponding sub-database in the CRP memory, and the PUF authentication card is inserted into the card slot of the PUF verification end, and the PUF authentication card is identified by the chip identity identifier of the PUF verification end. If it is confirmed that the PUF authentication card is a matching card of the PUF verification system, the chip identity identifier sends a signal to the PC controller, and the PC controller calls one group of stimulus response pairs of the PUF authentication card from the CRP memory. At the same time, the PC controller controls the lighting system and the CCD camera to power on and start working, and the PC controller controls the corresponding ports of the multi-port programmable power supply according to the stimulus signal of the stimulus response pair. Power on, the port of the multi-port programmable power supply is powered on to power on the corresponding bottom wiring port on the PUF authentication card, and then the wires between the bottom wiring ports are powered on to generate a specific magnetic field, and the specific magnetic field causes the magnetic ball inside the PUF authentication card to rotate specifically, and the PC controller sends a control signal to the illumination system and the CCD camera. Under the illumination of the illumination system, the reflection conditions of different magnetic balls are different, and thus a specific fluorescent pattern is formed. The fluorescent pattern is captured by the CCD camera and sent to the PC controller, and the PC controller compares the fluorescent pattern with the response pattern data of the stimulus response pair. If the comparison is successful, the PC controller opens the security lock, and at the same time, the PC controller deletes a set of stimulus response pairs currently used in the corresponding sub-database; if the comparison fails, the PC controller triggers the alarm system; if when identifying the PUF authentication card, it is confirmed that the PUF authentication card is not a matching card of the PUF verification system, then the PC controller triggers the alarm system.

[0013] The magnetic ball is movably installed in the spherical cavity, and when the magnetic ball is subjected to the magnetic field attraction, the magnetic ball can rotate freely in the spherical cavity. The fluorescent coating on the surface of the magnetic ball is a coating layer containing a fluorescent agent, and the non-fluorescent coating on the surface of the magnetic ball is a coating layer without a fluorescent agent. The fluorescent coating will emit light when stimulated by light of a certain frequency, while the non-fluorescent coating will not emit light after being stimulated by light. The left-side wiring terminal and the right-side wiring terminal of the circuit layer board respectively include 20 wiring ports in total, namely, ten horizontal and two vertical. The upper sealing plate and the lower sealing plate are respectively made of carbon fiber composite materials. The PC controller is connected to the PUF verification end, that is, the PC controller is electrically connected to the chip identity identifier, the multi-port programmable power supply, the lighting system and the CCD camera respectively. A set of excitation response pairs is a pair of CRPs, and one pair of CRPs of a PUF authentication card will be deleted by the PC controller after being used once. Due to the unique physical properties of the PUF authentication card itself and the distribution of the circuit, a more complex magnetic field will be generated inside the card. The wiring ports on the left and the wiring ports on the right are randomly paired and connected one-to-one through wires, that is, the twenty wiring ports on the left are just connected one-to-one with the twenty wiring ports on the right through twenty wires. The resin seal used to fix the wires covers all the wires to prevent the position of the wires from changing during use, affecting the stability of the structure and performance. This magnetic field is superimposed by the magnetic fields generated by different wires after they are energized. It should be noted here that since there are differences in the excitation signals in each group of excitation corresponding pairs, the wires that are energized each time the excitation signal is generated will be different, and the magnetic fields generated will be different, so the final superimposed magnetic field is also different. Therefore, this magnetic field will cause the magnetic ball inside the card to rotate specifically. After the rotation of the magnetic ball is completed, the magnetic ball will glow under light and form a specific fluorescent pattern. The PC controller can be connected to multiple PUF verification systems at the same time, and then the function of "one hub and multiple systems common" can be realized, that is, a central control terminal can integrate the identity identification information and corresponding excitation response pairs of multiple PUF verification systems, and control the multiple PUF verification systems connected to it to reduce the load.

[0014] Preferably, some or all of the wires used to connect the left terminal and the right terminal are not coated with an insulating layer on the outside, the length range of all wires used to connect the left terminal and the right terminal is 5-10 cm, and the lengths of all wires are not equal, the diameter range of all wires is 100-500 μm, and the diameters of all wires are not equal, and the diameter of the magnetic ball 13 is 1.5 mm. If some or all of the wires do not have an outer insulating layer, when the exposed wires are superimposed together, new paths will be formed, further increasing the complexity of the circuit. These new paths may be connected in parallel or in series, and the resistances are different everywhere, so the current size is different, so the magnetic field is different, and the lengths and diameters of the wires are different, which increases the randomness of the resistance distribution and further increases the complexity and safety of the system.

[0015] Preferably, a PMMA plate is embedded in the first window. The PMMA plate is a transparent plate with good light transmittance, which is convenient for letting light in and allowing the CCD camera to collect the reflected fluorescent pattern.

[0016] Preferably, the lighting system is a 365nm LED-UV lamp, and the CCD camera is a CCD-ZWSP-4KCH camera.

[0017] Preferably, the magnetic ball is made of neodymium iron boron magnet material. The chemical formula of neodymium iron boron magnet is Nd 2 Fe 14 B.

[0018] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0019] The present invention discloses an optical PUF identity authentication system based on electromagnetic effect, which is a key system with higher security performance based on the physical uncloning function (PUF) level, which gets rid of the easy theft of the basic key level, does not use the traditional mathematical method to generate and read the key, but uses its own unique physical properties to innovatively propose a more secure key; the key does not rely on complex algorithm system data, but uses the physical properties of reflective light and electromagnetic fields to generate a specific response that cannot be measured and imitated, thereby increasing the security performance; the random physical difference of the key has a natural feature that is difficult to clone or forge; each stimulus response pair is deleted by the system after being used once, truly achieving "one-time one-key" and having unpredictable characteristics; the authentication card of the present invention can be dually identified, including the identity recognition of the card and the image recognition of the stimulus response pair, and has the characteristics of special card for special use; the working principle of the present invention is relatively simple and easy to use, but it can generate more complex responses and has high security; if someone tries to use micro-detection or other invasive technologies to find the PUF key, this behavior will destroy the sensitive circuit used to build the PUF key and make the output useless; therefore, the extremely high security of the system of the present invention is further increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a schematic diagram of the principle of an optical PUF identity authentication system based on electromagnetic effect according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a PUF authentication card according to an embodiment of the present invention;

[0024] Figure 3 A schematic diagram of separating the PMMA upper clamping plate and the PMMA lower clamping plate according to an embodiment of the present invention;

[0025] Figure 4 This is a schematic diagram of the combination of a PMMA upper splint and a PMMA lower splint according to an embodiment of the present invention;

[0026] Figure 5 A schematic diagram of a PUF verification terminal according to an embodiment of the present invention;

[0027] Figure 6 A cross-sectional view of a PUF verification end according to an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of a magnetic ball according to an embodiment of the present invention.

[0029] In the figure: 1. PUF authentication card; 2. PUF verification terminal; 3. Security lock; 4. Upper sealing plate; 5. PMMA upper clamping plate; 6. PMMA lower clamping plate; 7. Circuit layer board; 8. Lower sealing plate; 9. Identity information chip; 10. First window; 11. Upper hemispherical groove; 12. Lower hemispherical groove; 13. Magnetic ball; 14. Fluorescent coating; 15. Non-fluorescent coating; 16. Wiring port; 17. Bottom wiring port; 18. Chip identity identifier; 19. Card-insertion box; 20. Light excitation and signal acquisition system; 21. Card slot; 22. Multi-port programmable power supply; 23. Illumination system; 24. CCD camera; 25. PC controller; 26. CRP memory; 27. Alarm system. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0031] In the description, it should be noted that the terms "first" and "second" are only used for descriptive purposes and should not be understood as indicating or implying relative importance. It should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0032] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0033] The following is combined with Figures 1 to 7 The specific embodiments of the present invention are described in detail.

[0034] In one embodiment, Figure 1As shown, an optical PUF identity authentication system based on electromagnetic effect includes at least one PUF verification system and a PC central control system; the PUF verification system includes a PUF authentication card 1, a PUF verification terminal 2 and a security lock 3, and the PUF authentication card 1 includes an upper sealing plate 4, a PMMA upper clamping plate 5, a PMMA lower clamping plate 6, a circuit layer plate 7 and a lower sealing plate 8 which are stacked in sequence.

[0035] The upper sealing plate 4 is embedded with an identity information chip 9, and the upper sealing plate 4 is also provided with a first window 10;

[0036] The lower surface of the PMMA upper clamping plate 5 is provided with a plurality of upper hemispherical grooves 11 arranged in an array, and the upper surface of the PMMA lower clamping plate 6 is provided with a plurality of lower hemispherical grooves 12 arranged in an array, and the upper hemispherical grooves and the lower hemispherical grooves 12 are respectively positioned correspondingly to form a spherical cavity array, and the spherical cavity array is located in a range directly facing the first window 10, and a magnetic ball 13 is movably installed in the spherical cavity, and the outer surface of the magnetic ball 13 is divided into two parts, and a fluorescent coating 14 is sprayed on one part of the magnetic ball 13, and a non-fluorescent coating 15 is sprayed on the other part;

[0037] The circuit layer board 7 is provided with a left wiring terminal and a right wiring terminal, each of which includes twenty wiring ports 16, and the left wiring ports 16 and the right wiring ports 16 are randomly paired and connected by wires and correspond one to one. The circuit layer board 7 is also provided with a resin sealing layer for fixing the wires;

[0038] The lower sealing plate 8 is provided with a plurality of bottom wiring ports 17 which respectively correspond to and are electrically connected to the wiring ports 16 of the circuit layer plate 7;

[0039] The PUF verification terminal 2 includes a chip identifier 18, a card-inserting box body 19, and a light excitation and signal acquisition system 20. The card-inserting box body 19 is provided with a card slot 21 adapted to the PUF authentication card 1. The chip identifier 18 is used to identify the PUF authentication card 1 and is fixed to the front side of the card slot 21. A multi-port programmable power supply 22 corresponding to and electrically connected to the bottom wiring port 17 on the PUF authentication card 1 is provided on the rear side wall of the card slot 21; a second window connected to the card slot 21 is provided on the front side wall of the card-inserting box body 19, and the spherical cavity array is located in the range facing the second window. The light excitation and signal acquisition system 20 includes an illumination system 23 and a CCD camera 24. The light of the illumination system 23 is irradiated onto the PUF authentication card 1 from the second window, and the reflected light of the PUF authentication card 1 passes through the second window and is reflected back to the CCD camera 24;

[0040] The PC central control system includes a PC controller 25, which is electrically connected to the PUF verification terminal 2 and the safety lock 3. The PC controller 25 is also connected to a CRP memory 26 and an alarm system 27; each PUF authentication card 1 has multiple groups of stimulus response pairs, and all stimulus response pairs of the same PUF authentication card 1 are saved in the corresponding sub-database in the CRP memory 26. The PUF authentication card 1 is inserted into the card slot 21 of the PUF verification terminal 2, and the PUF authentication card 1 is identified by the chip identity identifier 18 of the PUF verification terminal 2. If it is confirmed that the PUF authentication card 1 is a matching card of the PUF verification system, the chip identity identifier 18 sends a signal to the PC controller 25, and the PC controller 25 calls one of the stimulus response pairs of the PUF authentication card 1 from the CRP memory 26. At the same time, the PC controller 25 controls the lighting system 23 and the CCD camera 24 to power on and start working. The PC controller 25 controls the corresponding ports of the multi-port programmable power supply 22 to power on according to the stimulus signal of the stimulus response pair. The ports of the multi-port programmable power supply 22 are energized to energize the corresponding bottom wiring ports 17 on the PUF authentication card 1, and then the wires between the bottom wiring ports 17 are energized to generate a specific magnetic field, and the specific magnetic field causes the magnetic ball 13 inside the PUF authentication card 1 to rotate specifically. The PC controller 25 sends a control signal to the illumination system 23 and the CCD camera 24. Under the illumination of the illumination system 23, the reflection conditions of different magnetic balls 13 are different, thereby forming a specific fluorescent pattern. The fluorescent pattern is captured by the CCD camera 24 and sent to the PC controller 25. The PC controller 25 compares the fluorescent pattern with the response pattern data of the stimulus response pair. If the comparison is successful, the PC controller 25 opens the security lock 3, and at the same time, the PC controller 25 deletes a set of stimulus response pairs currently used in the corresponding database, so that "one-time one-key" can be realized; if the comparison fails, the PC controller 25 triggers the alarm system 27; if the PUF authentication card 1 is identified and it is confirmed that the PUF authentication card 1 is not a matching card of the PUF verification system, the PC controller 25 triggers the alarm system 27.

[0041] Among them, the wiring ports 16 on the left side and the wiring ports 16 on the right side of the circuit layer board 7 mentioned in the present invention are randomly paired and connected through wires and correspond one to one, which means that one of the wiring ports 16 on the left side and a random unpaired wiring port 16 on the right side are connected through wires, and the twenty wiring ports 16 on the left side and the twenty wiring ports 16 on the right side are just paired into twenty pairs. And the pairing is random and disordered, which ensures the randomness of the wire space distribution and increases the randomness of the magnetic field distribution.

[0042] The magnetic ball 13 is movably installed in the spherical cavity, that is, when the magnetic ball 13 is subjected to the magnetic field attraction, the magnetic ball 13 can rotate freely in the spherical cavity. The fluorescent coating 14 on the surface of the magnetic ball 13 is a coating layer containing a fluorescent agent, and the non-fluorescent coating 15 on the surface of the magnetic ball 13 is a coating layer without a fluorescent agent. The fluorescent coating 14 will emit light when stimulated by a certain frequency of light, while the non-fluorescent coating 15 will not emit light after being stimulated by light. It is easy for those skilled in the art to understand that the magnetic ball rotates under the drive of the magnetic field. In order to achieve that the fluorescent coating 14 will reflect light after receiving light and form different patterns through reflection, the area of ​​the fluorescent coating 14 and the non-fluorescent coating 15 should be moderate, not too large or too small. However, in order to increase the security of the identity authentication system described in the present invention, the areas of the fluorescent coating 14 and the non-fluorescent coating 15 on the magnetic ball 13 are random, and the corresponding relationship between the N pole\S pole of each magnetic ball 13 and the fluorescent coating 14 and the non-fluorescent coating 15 is also random, which further increases the complexity and randomness. The left wiring terminal and the right wiring terminal of the circuit layer board 7 respectively include 20 wiring ports 16, which are 10 horizontally and 2 vertically. The upper sealing plate 4 and the lower sealing plate 8 are respectively made of carbon fiber composite materials. The PC controller 25 is connected to the PUF verification end 2, that is, the PC controller 25 is electrically connected to the chip identity identifier 18, the multi-port programmable power supply 22, the lighting system 23 and the CCD camera 24. A set of excitation response pairs is a pair of CRPs, and one pair of CRPs of a PUF authentication card 1 will be deleted by the PC controller 25 after being used once. Due to the unique physical properties of the PUF authentication card 1 itself and the distribution of the circuit, a more complex magnetic field will be generated inside the card. This magnetic field is a superposition of magnetic fields generated by different wires after being energized. It should be noted here that since there are differences in the excitation signals in each group of excitation corresponding pairs, there will be differences in the wires that are energized each time the excitation signal is generated, and the magnetic field generated will be different, so the final superimposed magnetic field is also different, so the magnetic field will cause the magnetic ball 13 inside the card to rotate specifically. After the rotation of the magnetic ball 13 is completed, the magnetic ball 13 will emit light under light and form a specific fluorescent pattern. The PC controller 25 can connect to multiple PUF verification systems at the same time, thereby realizing the function of "one hub for multiple systems", that is, one central control terminal can integrate the identity recognition information of multiple PUF verification systems and the corresponding stimulus response pairs, and control the multiple PUF verification systems connected to it separately to achieve the effect of reducing the load.

[0043] In a specific embodiment, the optical PUF identity authentication system based on electromagnetic effect described in the present invention includes two PUF verification systems and a PC central control system. The PC central control system is connected to the two PUF verification systems at the same time. Its working principle is as follows:

[0044] Each PUF verification system corresponds to registering multiple PUF authentication cards 1. When registering, first identify the current PUF authentication card 1 when needed, mark and register the PUF authentication card 1, and then establish a sub-database corresponding to the current PUF authentication card 1 in the database of the PC controller 25. After the establishment is completed, all CRPs of the current PUF authentication card 1 are collected by the system and stored in the sub-database corresponding to the current PUF authentication card 1. When all PUF authentication cards 1 are registered, they start to be used;

[0045] When someone inserts a card into the card slot 21 of the PUF verification terminal 2, the PUF authentication card 1 is first identified by the chip identifier 18 of the PUF verification terminal 2, and the chip identifier 18 sends a signal to the PC controller 25, and the PC controller 25 then identifies which specific card it is. The PC controller 25 searches for the corresponding sub-database from the CRP memory 26 according to the information of the PUF authentication card 1. If the corresponding sub-database can be found, it can be confirmed that the PUF authentication card 1 is a matching card of the PUF verification system. Then the PC controller 25 calls one of the excitation response pairs of the PUF authentication card 1 from the sub-database in the CRP memory 26. At the same time, the PC controller 25 controls the illumination system 23 and the CCD camera 24 to power on and start working. The PC controller 25 controls the corresponding port of the multi-port programmable power supply 22 to power on according to the excitation signal of the excitation response pair. The port of the multi-port programmable power supply 22 is powered on to power on the corresponding bottom wiring port 17 on the PUF authentication card 1, and then the wires between the bottom wiring ports 17 are powered on to generate a specific magnetic field. The specific The fixed magnetic field causes the magnetic ball 13 inside the PUF authentication card 1 to rotate specifically, and the PC controller 25 sends a control signal to the illumination system 23 and the CCD camera 24. Under the illumination of the illumination system 23, different magnetic balls 13 have different reflective conditions, thereby forming a specific fluorescent pattern. The fluorescent pattern is captured by the CCD camera 24 and sent to the PC controller 25. The PC controller 25 compares the fluorescent pattern with the response pattern data of the stimulus response pair. If the comparison is successful, the verification is passed, and the PC controller 25 opens the security lock 3. At the same time, the PC controller 25 deletes a set of stimulus response pairs currently used in the sub-database, so that "one-time one-key" can be achieved; if the comparison fails, the PC controller 25 triggers the alarm system 27; if the PUF authentication card 1 is identified and it is confirmed that the PUF authentication card 1 is not a matching card of the PUF verification system, the PC controller 25 triggers the alarm system 27, and the current PUF authentication card 1 can also be verified on another set of the PUF verification system. The verification process of the other set of the PUF verification system is the same as the above process of the PUF verification system. On the basis of the above embodiment, in a preferred embodiment, part or all of the wires used to connect the left terminal and the right terminal are not coated with an insulating layer, the length of all wires used to connect the left terminal and the right terminal is in the range of 5 to 10 cm, and the lengths of all wires are not equal, the diameters of all wires are in the range of 100 to 500 μm, and the diameters of all wires are not equal, and the diameter of the magnetic ball 13 is 1.5 mm. If part or all of the wires do not have an outer insulating skin, when the exposed wires are superimposed together, a new path will be formed, further increasing the complexity of the circuit.These new pathways may be connected in parallel or in series, and the resistance is different everywhere, so the current size is different, and the magnetic field is different. In addition, the different lengths and diameters of the wires further make the resistance distribution random, increasing the complexity and safety of the system.

[0046] Based on the above embodiment, in a preferred embodiment, a PMMA plate is embedded in the first window 10. The PMMA plate is a transparent plate with good light transmittance.

[0047] On the basis of the above embodiments, in a preferred embodiment, the illumination system 23 is a 365 nm LED-UV lamp, and the CCD camera 24 is a CCD-ZWSP-4KCH camera.

[0048] Based on the above embodiments, in a preferred embodiment, the magnetic ball 13 is made of a neodymium iron boron magnet material. The chemical formula of the neodymium iron boron magnet is Nd 2 Fe 14 B.

[0049] The present invention is a security anti-theft system based on the physical level. Compared with other entities, it is more secure, more difficult to be hacked and identified, and is not affected by fixed biological characteristics. Compared with traditional fingerprint or face unlocking, it has better security and non-replicability. Compared with PUF designs with other characteristics, the complexity of physical PUF is higher, the randomness is greatly improved, it is more convenient to use, and it can adapt to different environments to avoid interference from the environment. The present invention uses PUF combined with electromagnetic technology to realize the construction of the anti-theft system for the first time. The PUF authentication card 1 in the present invention uses the principle of randomness to construct its unique response for the first time to ensure that each card (key) has its unique characteristics. It benefits from the uncertainty of the internal circuit and the uncertainty of the fluorescence distribution. Each excitation response pair is deleted by the system after being used once, which truly achieves "one-time one-key" and has unpredictable characteristics; the PUF authentication card 1 has dual recognition, including the identity recognition of the card and the image recognition of the excitation response pair, which can realize the special card for special use; the present invention does not require a complex algorithm to design the internal structure, but only relies on its random physical properties, which is more difficult to be deciphered and has extremely high security.

[0050] The above is only a specific implementation of the present invention, which enables those skilled in the art to understand or implement the present invention. Although detailed descriptions are given with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments, and they should all be covered by the protection scope of the claims.

Claims

1. An optical PUF identity authentication system based on electromagnetic effect, characterized in that: The invention comprises a PC central control system and at least one PUF verification system; the PUF verification system comprises a PUF authentication card (1), a PUF verification terminal (2) and a safety lock (3); the PUF authentication card (1) comprises an upper sealing plate (4), a PMMA upper clamping plate (5), a PMMA lower clamping plate (6), a circuit layer plate (7) and a lower sealing plate (8) which are stacked in sequence. The upper sealing plate (4) is embedded with an identity information chip (9), and the upper sealing plate (4) is also provided with a first window (10); The lower surface of the PMMA upper clamping plate (5) is provided with a plurality of upper hemispherical grooves (11) arranged in an array, and the upper surface of the PMMA lower clamping plate (6) is provided with a plurality of lower hemispherical grooves (12) arranged in an array, the upper hemispherical grooves (11) and the lower hemispherical grooves (12) are respectively positioned correspondingly to form a spherical cavity array, the spherical cavity array is located within a range directly facing the first window (10), a magnetic ball (13) is movably installed in the spherical cavity, and the outer surface of the magnetic ball (13) is divided into two parts, one part of which is sprayed with a fluorescent coating (14) and the other part is sprayed with a non-fluorescent coating (15); The circuit layer board (7) is provided with a left wiring terminal and a right wiring terminal, each of which includes twenty wiring ports (16), the left wiring ports (16) and the right wiring ports (16) are randomly paired and connected through wires and correspond one to one, and the circuit layer board (7) is also provided with a resin sealing layer for fixing the wires; The lower sealing plate (8) is provided with a plurality of bottom wiring ports (17) which respectively correspond to and are electrically connected to the wiring ports (16) of the circuit layer plate (7); The PUF verification terminal (2) comprises a chip identification device (18), a card-insertion box (19), and a light excitation and signal acquisition system (20); the card-insertion box (19) is provided with a card slot (21) adapted to the PUF authentication card (1); the chip identification device (18) is used to identify the PUF authentication card (1) and is fixed to the front side of the card slot (21); and the rear side wall of the card slot (21) is provided with ports corresponding to the bottom wiring ports (17) on the PUF authentication card (1) and An electrically connected multi-port programmable power supply (22); a second window connected to the card slot (21) is formed on the front side wall of the card-inserting box body (19); the spherical cavity array is located in a range directly opposite to the second window; the light excitation and signal acquisition system (20) comprises an illumination system (23) and a CCD camera (24); light from the illumination system (23) is irradiated onto the PUF authentication card (1) through the second window; and reflected light from the PUF authentication card (1) is reflected back to the CCD camera (24) through the second window; The PC central control system comprises a PC controller (25), the PC controller (25) is electrically connected to the PUF verification terminal (2) and the safety lock (3), and the PC controller (25) is also connected to a CRP memory (26) and an alarm system (27); each PUF authentication card (1) has a plurality of stimulus response pairs, and all stimulus response pairs of the same PUF authentication card (1) are stored in a corresponding sub-database in the CRP memory (26); the PUF authentication card (1) is inserted into a card slot (21) of the PUF verification terminal (2), and the PUF verification terminal (2) is used to detect the presence of a signal from the PUF authentication card (1). The chip identifier (18) identifies the PUF authentication card (1). If the PUF authentication card (1) is confirmed to be a matching card of the PUF verification system, the chip identifier (18) sends a signal to the PC controller (25). The PC controller (25) calls one of the stimulus response pairs of the PUF authentication card (1) from the CRP memory (26). At the same time, the PC controller (25) controls the illumination system (23) and the CCD camera (24) to start working. The PC controller (25) controls the multi-port programmable power supply (22) according to the stimulus signal of the stimulus response pair. ) is powered on, and the port of the multi-port programmable power supply (22) is powered on so that the corresponding bottom wiring port (17) on the PUF authentication card (1) is powered on, so that the wires between the bottom wiring ports (17) are powered on to generate a specific magnetic field, and the specific magnetic field causes the magnetic ball (13) inside the PUF authentication card (1) to rotate specifically. The PC controller (25) sends a control signal to the illumination system (23) and the CCD camera (24). Under the illumination of the illumination system (23), the reflection conditions of different magnetic balls (13) are different, thereby forming a specific fluorescent pattern, which is detected by the CCD camera (24). ) captures the fluorescent pattern and sends it to the PC controller (25), the PC controller (25) compares the fluorescent pattern with the response pattern data of the stimulus response pair, if the comparison is successful, the PC controller (25) opens the security lock (3), and at the same time the PC controller (25) deletes a set of stimulus response pairs currently used in the corresponding sub-database; if the comparison fails, the PC controller (25) triggers the alarm system (27); if the PUF authentication card (1) is identified and it is confirmed that the PUF authentication card (1) is not a matching card of the PUF authentication system, the PC controller (25) triggers the alarm system (27).

2. According to claim 1, an optical PUF identity authentication system based on electromagnetic effect is characterized in that: Part or all of the wires used to connect the left terminal and the right terminal are not coated with an insulating layer, the length of all the wires used to connect the left terminal and the right terminal is in the range of 5 to 10 cm, and the lengths of all the wires are not equal, the diameter of all the wires is in the range of 100 to 500 μm, and the diameters of all the wires are not equal, and the diameter of the magnetic ball (13) is 1.5 mm.

3. The optical PUF identity authentication system based on electromagnetic effect according to claim 2, characterized in that: A PMMA plate is embedded in the first window (10).

4. The optical PUF identity authentication system based on electromagnetic effect according to claim 3, characterized in that: The illumination system (23) is a 365 nm LED-UV lamp, and the CCD camera (24) is a CCD-ZWSP-4KCH camera.

5. An optical PUF identity authentication system based on electromagnetic effect according to any one of claims 1 to 4, characterized in that: The magnetic ball (13) is made of a neodymium iron boron magnet material, and the upper sealing plate (4) and the lower sealing plate (8) are respectively made of a carbon fiber composite material.

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