CN115378657A - Authentication synchronization method based on internal temperature sensing of integrated circuit - Google Patents
Authentication synchronization method based on internal temperature sensing of integrated circuit Download PDFInfo
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- 238000010438 heat treatment Methods 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 9
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- 230000010355 oscillation Effects 0.000 claims description 8
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- 230000001960 triggered effect Effects 0.000 claims description 3
- 230000000977 initiatory effect Effects 0.000 claims description 2
- 238000002955 isolation Methods 0.000 abstract description 2
- 238000001931 thermography Methods 0.000 description 5
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/08—Network architectures or network communication protocols for network security for authentication of entities
Abstract
The invention belongs to the technical field of authentication systems, and discloses an authentication synchronization method based on integrated circuit internal temperature sensing, which can enhance the safety of a system by isolating an interrupt signal of an authentication end compared with the direct influence of a random digital-analog block, wherein the authentication end judges whether to enter an authentication legal period or not by detecting the internal state of a circuit instead of controlling the authentication end by the random digital-analog block, so that the isolation of a hotspot control and the interrupt signal by an authentication end circuit is realized, the capability of the authentication system for resisting malicious attacks is enhanced, an internal temperature sensor is arranged in an FPGA (field programmable gate array) to realize the authentication, the authentication of the authentication end and a host end can be effectively carried out, the judgment of the authentication end on the legal period is realized based on the internal temperature sensor, the authentication synchronization is realized, and an auxiliary authentication function is realized by depending on the agreement of both sides.
Description
Technical Field
The invention belongs to the technical field of authentication systems, and particularly relates to an authentication synchronization method based on internal temperature sensing of an integrated circuit.
Background
The traditional authentication system carries out encryption and decryption through encryption algorithms such as AES (advanced encryption standard) and the like, information transmission of both parties is carried out through digital signals, the system is easy to cause information leakage when being attacked from outside, the system is lack of reliable auxiliary encryption, and the safety is not enough. However, the auxiliary means is not outstanding in specificity, and the reliability of the auxiliary means is gradually reduced along with the attack research, so that the probability of being cracked by the attack is greatly increased.
The method for realizing the auxiliary authentication based on the thermal imaging physical effect hides the authentication condition through the arrangement of 'hot spots' to resist the attack, the client side judges the validity period of the authentication end by observing whether the 'hot spots' of the authentication end are 'lighted' through a thermal imager, the distribution of the hot spots is controlled by decoding of a random number module of the authentication end, the authentication end judges whether the authentication end enters the validity period through the interruption generated by the random number module, the authentication end and the random number module are both directly influenced, and the security threatens.
Disclosure of Invention
The present invention is directed to an authentication synchronization method based on temperature sensing inside an integrated circuit, so as to solve the problems in the prior art mentioned above.
In order to achieve the purpose, the invention adopts the following technical scheme:
an authentication synchronization method based on integrated circuit internal temperature sensing comprises the following steps:
a data transmission unit is established between the authentication end and the host end, and the authentication end is additionally provided with an efficient heating module, so that the authentication end enables the efficient heating module to generate a target 'hot spot' according to circuit design;
an internal temperature sensor is arranged in the data transmission unit;
the internal temperature sensor sends an interrupt to the control unit after sensing that the temperature reaches a threshold value;
after the control unit receives the interrupt, the host end starts authentication according to the observation of a target 'hot spot' by the thermal imager, and the authenticator judges whether to enter an authentication validity period or not according to the state of the circuit of the authenticator.
Further, the internal temperature sensor is arranged in the FPGA; the FPGA comprises a host end, an authentication FPGA special plate and a thermal imager, wherein the thermal imager and the host end are connected with the authentication FPGA special plate.
Furthermore, the special authentication FPGA board comprises an adapter, a main control unit, a heating module and a temperature sensing module, wherein the heating module is connected with the main control unit through the temperature sensing module, the heating module is also sequentially connected with a random number generator and a timer, and the adapter is connected with the main control unit.
Further, the adapter comprises a USB adapter, a monitoring module and an SDIO adapter, wherein the monitoring module is connected between the USB adapter and the SDIO adapter, and the USB adapter is connected with a main window in the host end through a USB interface.
Further, the safety authentication of the internal temperature sensing comprises the following steps:
inserting the SD card into an SDIO adapter to be connected with the main window;
observing a thermal distribution diagram of the FPGA chip through a thermal imager, when a target hot spot appears, indicating that an authentication legal period is entered, initiating an SD card reading request by an operator through a main window, and transmitting request information to the FPGA through a USB interface by a host;
the main control unit judges whether the moment of receiving the request signal is an authentication legal period through the monitoring module, and if not, a self-destruction program is triggered to prevent the data stored in the SD card from being stolen; if the authentication request is in the legal period, a success signal is returned to the host computer, and the host computer is allowed to read important information in the SD card.
Further, the internal temperature sensor includes a ring oscillator, a counter, a timer, a comparator, and a control unit; the ring oscillator, the counter, the timer and the comparator are all connected with the control unit,
furthermore, the counter is in one-way connection with the control unit, and the ring oscillator, the timer, the comparator and the control unit are in two-way connection; the ring oscillator, the counter, the timer and the comparator are connected in sequence;
the oscillation frequency of the ring oscillator is affected by the temperature of the circuit, and the higher the temperature is, the higher the oscillation frequency is, namely, the output signal of the ring oscillator is more rapidly turned over when the hot spot of the area where the ring oscillator is located is lightened.
Further, when the internal temperature sensor works, the method comprises the following steps:
taking the output of the ring oscillator as an input clock of a counter module for counting;
the control unit determines when the counter is enabled, and the enabled effective time is timed by the timer;
the counter transmits the count value in the specified time to the comparator;
the comparator compares the count value with a set value, and if the count value is greater than the set value, an interrupt signal is sent out.
Further, the host end includes a processor therein.
Further, the processor receives the interrupt from the internal temperature sensor of each hotspot area, judges whether the interrupt is from the target hotspot area, if so, indicates that the authentication period is legal from the current time, and if the processor does not receive the authentication request from the host after waiting for a period of time, the processor jumps back to the authentication illegal period.
The invention has the technical effects and advantages that: compared with the prior art, the authentication synchronization method based on the internal temperature sensing of the integrated circuit has the following advantages that:
compared with the method which is directly influenced by a random digital-analog block, the method has the advantages that the safety of the system can be enhanced by isolating the interrupt signal of the authentication end, the authentication end judges whether the authentication legal period is entered or not by detecting the internal state of the circuit instead of controlling the authentication end by the random digital-analog block by arranging the internal temperature sensing circuit, so that the hot point control and the interrupt signal are isolated by the authentication end circuit, the capability of resisting malicious attack of the authentication system is enhanced, the internal temperature sensor is arranged in the FPGA to realize the authentication, the authentication of the authentication end and the host end can be effectively carried out, the judgment of the authentication end on the legal period is realized based on the internal temperature sensor, the synchronization of the authentication is realized, and the auxiliary authentication function is realized by depending on the agreement of both sides.
Drawings
FIG. 1 is a flow chart of an authentication synchronization method based on temperature sensing inside an integrated circuit according to the present invention;
FIG. 2 is a flow chart of a thermal imaging based secondary authentication process of the present invention;
FIG. 3 is a block diagram of an internal temperature sensing based security authentication prototype architecture of the present invention;
fig. 4 is a schematic structural view of the internal temperature sensor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The specific embodiments described herein are merely illustrative of the invention and do not delimit the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.
An embodiment of the present invention provides an authentication synchronization method based on internal temperature sensing of an integrated circuit, which includes, as shown in fig. 1, the following steps:
s1, establishing a data transmission unit between an authentication end and a host end, additionally arranging a high-efficiency heating module at the authentication end, and enabling the authentication end to enable the high-efficiency heating module to generate a target 'hot spot' according to circuit design;
s2, an internal temperature sensor is arranged in the data transmission unit;
s3, after sensing that the temperature reaches a threshold value, the internal temperature sensor sends an interrupt to the control unit;
and S4, after the control unit receives the interrupt, the host end starts authentication according to the target 'hot spot' observed by the thermal imager, and the authenticator judges whether to enter an authentication legal period or not according to the state of the circuit of the authenticator.
By the method, compared with the method directly influenced by the random digital-analog block, the safety of the system can be enhanced by isolating the interrupt signal of the authentication end, the authentication end judges whether the authentication end enters the legal period or not by detecting the internal state of the circuit instead of controlling the authentication end by the random digital-analog block by arranging the internal temperature sensing circuit, so that the hot point control and the interrupt signal are isolated by the authentication end circuit, the capability of resisting malicious attack of the authentication system is enhanced, the internal temperature sensor is arranged in the FPGA to realize the authentication, the authentication of the authentication end and the host end can be effectively carried out, the judgment of the authentication end on the legal period is realized based on the internal temperature sensor, the synchronization of the authentication is realized, and the auxiliary authentication function is realized by depending on the agreed protocols of the two parties.
Specifically, the method realizes the transmission of interruption based on an internal sensing module, and the method for realizing the auxiliary authentication based on the thermal imaging is to add a customized circuit for an authentication end, and send an interruption indication to an authentication end core control unit through the internal sensing module to enter an authentication validity period, so that the authentication end circuit isolates hotspot control and interruption signals. Based on FPGA, the method for realizing authentication synchronization based on circuit internal temperature sensing is applied. Compared with the method that the mapping control of the hotspot unit is realized through the random number module of the authentication end and the interrupt signal is sent to the core control unit, the safety of the system can be improved.
After the data transmission unit and the hot spot unit of the system are designed, each hot spot unit is provided with an internal temperature sensor, each internal temperature sensor sends an interrupt to the control unit after sensing that the temperature reaches a threshold value, and the control unit determines whether to enter an authentication legal period or not through judgment after receiving the interrupt.
As shown in fig. 2, by adding the high-efficiency heating module at the authentication end, and enabling the authenticator to enable the high-efficiency heating module to generate a target "hot spot" according to the circuit design,
and the client starts authentication according to the observation of a target 'hot spot' by the thermal imager, and the authentication party judges whether the authentication is in a legal period or not according to the state of a circuit of the authentication party. The authentication end is judged in the legal period based on the internal temperature sensor, the authentication is synchronized, and the auxiliary authentication function is realized by means of the agreed protocols of the two parties.
In this embodiment, an implementation process of the authentication synchronization method for internal temperature sensing is described in detail by taking an example of implementing a security authentication prototype based on an FPGA.
Specifically, the internal temperature sensor is arranged in the FPGA for realization, the authentication between an authentication end and a host end can be effectively carried out, and the internal temperature sensor is arranged in the FPGA; the FPGA comprises a host end, an authentication FPGA dedicated board and a thermal imager, wherein the thermal imager and the host end are both connected with the authentication FPGA dedicated board, as shown in fig. 3.
The authentication method based on the internal temperature sensing of the integrated circuit is provided on the basis of an auxiliary authentication system based on thermal imaging, and the original auxiliary authentication system based on thermal imaging is composed of a host, a physical authentication FPGA special-purpose board and a thermal imager, wherein the physical authentication FPGA special-purpose board comprises a temperature sensing module for realizing authentication synchronization besides an adapter for communication, a main control unit for realizing control and a heating module.
The special authentication FPGA board comprises an adapter, a main control unit, a heating module and a temperature sensing module, wherein the heating module is connected with the main control unit through the temperature sensing module, the heating module is also sequentially connected with a random number generator and a timer, and the adapter is connected with the main control unit. The adapter comprises a USB adapter, a monitoring module and an SDIO adapter, wherein the monitoring module is connected between the USB adapter and the SDIO adapter, and the USB adapter is connected with a main window in a host end through a USB interface.
Specifically, after the system is started, when a professional wants to read data from the SD card to the main window, the professional needs to observe the thermal distribution map of the FPGA chip through the thermal imager, when a target hot spot appears, it indicates that the authentication legal period is entered, the operator initiates a request for reading the SD card through the main window, and the host transmits request information to the FPGA through the USB interface. The main control unit judges whether the moment of receiving the request signal is an authentication legal period through the monitoring module, and if not, a self-destruction program is triggered to prevent the data stored in the SD card from being stolen; if the authentication request is in the legal period, a success signal is returned to the host computer, and the host computer is allowed to read important information in the SD card.
As shown in fig. 4, the internal temperature sensor includes a ring oscillator, a counter, a timer, a comparator, and a control unit; the ring oscillator, the counter, the timer and the comparator are all connected with the control unit, the counter and the control unit are in one-way connection, and the ring oscillator, the timer, the comparator and the control unit are in two-way connection; the ring oscillator, the counter, the timer and the comparator are connected in sequence; the oscillation frequency of the ring oscillator is affected by the temperature of the circuit, and the higher the temperature is, the higher the oscillation frequency is, namely, the output signal of the ring oscillator is more rapidly turned over when the hot spot of the area where the ring oscillator is located is lightened.
Specifically, the oscillation frequency of the ring oscillator is affected by the temperature of the circuit, and the oscillation frequency is higher when the temperature is higher, that is, the output signal of the ring oscillator is more rapidly inverted when the hot spot of the area where the ring oscillator is located is lit, so that the output of the ring oscillator can be used as the input clock of the counter module for counting. The control unit determines when the counter is enabled, and the enabled effective time is timed to be completed by the timer. On the basis, the counter transmits the count value in the specified time to the comparator, the comparator compares the count value with the set value, and if the count value is larger than the set value, an interrupt signal is sent out.
In addition, the host end comprises a processor. And after receiving the interrupt from the internal temperature sensor of each hotspot area, the processor judges whether the interrupt is from a target hotspot area, if so, indicates that the authentication period is legal from the current time, and if after a period of time waiting, does not receive an authentication request from the host, jumps back to the authentication illegal period.
In conclusion, the authentication system judges the hot spot region based on internal temperature sensing, realizes the isolation of the authentication end circuit to the hot spot control and the interrupt signal, enhances the capability of the authentication system to resist malicious attacks, and sends an interrupt indication to the authentication end core control unit through the internal sensing module to enter the authentication validity period, so that the authentication end circuit isolates the hot spot control and the interrupt signal.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (10)
1. An authentication synchronization method based on integrated circuit internal temperature sensing is characterized by comprising the following steps:
a data transmission unit is established between the authentication end and the host end, and the authentication end is additionally provided with an efficient heating module, so that the authentication end enables the efficient heating module to generate a target 'hot spot' according to circuit design;
an internal temperature sensor is arranged in the data transmission unit;
the internal temperature sensor sends an interrupt to the control unit when sensing that the temperature reaches a threshold value;
after the control unit receives the interrupt, the host end starts authentication according to the target 'hot spot' observed by the thermal imager, and the authenticator judges whether to enter the authentication legal period or not according to the state of the circuit of the authenticator.
2. The method of claim 1, wherein the method comprises: the internal temperature sensor is arranged in the FPGA; the FPGA comprises a host end, an authentication FPGA special plate and a thermal imager, wherein the thermal imager and the host end are connected with the authentication FPGA special plate.
3. The method of claim 2, wherein the method comprises the following steps: the special authentication FPGA board comprises an adapter, a main control unit, a heating module and a temperature sensing module, wherein the heating module is connected with the main control unit through the temperature sensing module, the heating module is further sequentially connected with a random number generator and a timer, and the adapter is connected with the main control unit.
4. The method of claim 3, wherein the method comprises the following steps: the adapter comprises a USB adapter, a monitoring module and an SDIO adapter, wherein the monitoring module is connected between the USB adapter and the SDIO adapter, and the USB adapter is connected with a main window in a host end through a USB interface.
5. The method of claim 4, wherein the method comprises: when the safety authentication of the internal temperature sensing is carried out, the method comprises the following steps:
inserting the SD card into an SDIO adapter to be connected with the main window;
observing a thermal distribution diagram of the FPGA chip through a thermal imager, when a target hot spot appears, indicating that an authentication legal period is entered, initiating an SD card reading request by an operator through a main window, and transmitting request information to the FPGA through a USB interface by a host;
the main control unit judges whether the moment of receiving the request signal is an authentication legal period through the monitoring module, and if not, a self-destruction program is triggered to prevent the data stored in the SD card from being stolen; if the authentication request is in the legal period, a success signal is returned to the host computer, and the host computer is allowed to read important information in the SD card.
6. The method of claim 5, wherein the method comprises: the internal temperature sensor comprises a ring oscillator, a counter, a timer, a comparator and a control unit; and the ring oscillator, the counter, the timer and the comparator are all connected with the control unit.
7. The method of claim 6, wherein the method comprises: the counter is in one-way connection with the control unit, and the ring oscillator, the timer, the comparator and the control unit are in two-way connection; the ring oscillator, the counter, the timer and the comparator are connected in sequence;
the oscillation frequency of the ring oscillator is affected by the temperature of the circuit, and the higher the temperature is, the higher the oscillation frequency is, namely, the output signal of the ring oscillator is more rapidly turned over when the hot spot of the area where the ring oscillator is located is lightened.
8. The method of claim 7, wherein the method comprises the following steps: when the internal temperature sensor works, the method comprises the following steps:
taking the output of the ring oscillator as an input clock of a counter module for counting;
the control unit determines when the counter is enabled, and the enabled effective time is timed by the timer;
the counter transmits the count value in the specified time to the comparator;
the comparator compares the count value with a set value, and if the count value is greater than the set value, an interrupt signal is sent out.
9. The method of claim 8, wherein the method comprises the following steps: the host end comprises a processor.
10. The method of claim 9, wherein the method comprises the following steps: and after receiving the interrupt from the internal temperature sensor of each hotspot area, the processor judges whether the interrupt is from a target hotspot area, if so, indicates that the authentication period is legal from the current time, and if after a period of time waiting, does not receive an authentication request from the host, jumps back to the authentication illegal period.
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