CN204759426U - Electromagnetism analytic system of crypto chip - Google Patents
Electromagnetism analytic system of crypto chip Download PDFInfo
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- CN204759426U CN204759426U CN201520395367.8U CN201520395367U CN204759426U CN 204759426 U CN204759426 U CN 204759426U CN 201520395367 U CN201520395367 U CN 201520395367U CN 204759426 U CN204759426 U CN 204759426U
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Abstract
The utility model relates to an information security technology field especially relates to an electromagnetism analytic system of crypto chip, include: crypto chip, constant voltage power supply, electromagnetic signal detector, digital storage oscilloscope and computer, the crypto chip is connected with calculation is electromechanical, constant voltage power supply and password chip electric connection, electromagnetic signal detector and crypto chip coupled linking, digit storage oscilloscope is connected with electromagnetic signal detector electricity, the computer is connected with digital storage oscilloscope electricity. The utility model discloses can measure local electromagnetic radiation, through placing the electromagnetic signal detector in near subassembly of surveying, can measure the solitary electromagnetic radiation circumstances of this subassembly accurately, so this electromagnetism analytic system is difficult the circumstances of " the mistake is alert " appears, the probability of success of can effectual improvement attacking.
Description
Technical field
The utility model relates to field of information security technology, particularly relates to a kind of emi analysis system of crypto chip.
Background technology
Along with the raising day by day of scientific and technological level, various cryptographic algorithm and safety chip are more and more widely used in daily life, economic activity and Military Application, are also deepening continuously for the attack of cryptographic algorithm and hardware device and Protective Research simultaneously.Crypto chip can leak the information except input and output in operational process, and as power consumption, electromagnetic radiation, bug, time sequence information etc., these are referred to as side channel information.Certain correlationship is there is in side channel information with the computing of crypto chip bosom, intermediateness data, key.Utilize these side channel informations to carry out key distribution to crypto chip and be called side Multiple Channel Analysis.
At present, widely used in the Multiple Channel Analysis of side is power consumption analysis, power consumption acquisition system is normally at crypto chip VDD-to-VSS end series connection small resistor, power consumption profile is gathered to analyze by measuring voltage on small resistor, when measuring power consumption, power consumption analysis technology analyzes total current, the power consumption of chip entirety can only be measured, the single component that will analyze cannot be accurate to, thus cause likely occurring when power consumption analysis " by mistake alert ", namely in the difference curves of power consumption, because the power consumption of other assembly affects, what peak-peak was corresponding is not correct key value.
Utility model content
The purpose of this utility model is the emi analysis system providing a kind of crypto chip, comprising: crypto chip, stabilized voltage supply, electromagnetic signal detector, digital storage oscilloscope and computing machine; Crypto chip is electrically connected with computing machine, the plaintext sent for receiving computer or ciphertext, and expressly will return ciphertext or plaintext through encryption or decryption processing backcasting machine; Stabilized voltage supply is electrically connected with crypto chip, for powering for crypto chip; Electromagnetic signal detector and crypto chip are of coupled connections, for gathering the ELECTROMAGNETIC RADIATION SIGNATURE that crypto chip is revealed; Digital storage oscilloscope is electrically connected with electromagnetic signal detector, for recording the ELECTROMAGNETIC RADIATION SIGNATURE that electromagnetic signal detector gathers; Computing machine is electrically connected with digital storage oscilloscope, for gathering and store the ELECTROMAGNETIC RADIATION SIGNATURE of digital storage oscilloscope record, and carries out analysis to ELECTROMAGNETIC RADIATION SIGNATURE and obtains secret information.
Further, electromagnetic signal detector is electromagnetic probe or self-control coil.
Further, crypto chip is communicated with computing machine by USB or serial ports.
Further, computing machine is communicated with digital storage oscilloscope by USB.
Compared with prior art the beneficial effects of the utility model are: this emi analysis system can be measured local electromagnetic radiation, by electromagnetic signal detector being placed near surveyed assembly, accurately can measure the electromagnetic radiation situation that this assembly is independent, therefore not easily there is the situation of " by mistake alert " in this emi analysis system, effectively can improve the probability of success of attack.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of the emi analysis system of a kind of crypto chip of the utility model.
Embodiment
Also by reference to the accompanying drawings the utility model is described in further detail below by specific embodiment.
Below in conjunction with instantiation and Figure of description, the utility model is described further.
Shown in ginseng Fig. 1, Fig. 1 is the structured flowchart of the emi analysis system of a kind of crypto chip of the utility model.
Present embodiments provide a kind of emi analysis system of crypto chip, comprising: crypto chip 1, stabilized voltage supply 2, electromagnetic signal detector 3, digital storage oscilloscope 4 and computing machine 5; Crypto chip 1 is electrically connected with computing machine 5, the plaintext sent for receiving computer 5 or ciphertext, and expressly will return ciphertext or plaintext through encryption or decryption processing backcasting machine 5; Stabilized voltage supply 2 is electrically connected with crypto chip 1, for powering for crypto chip 1; Electromagnetic signal detector 3 and crypto chip 1 are of coupled connections, for gathering the ELECTROMAGNETIC RADIATION SIGNATURE that crypto chip 1 is revealed; Digital storage oscilloscope 4 is electrically connected with electromagnetic signal detector 3, for recording the ELECTROMAGNETIC RADIATION SIGNATURE that electromagnetic signal detector gathers; Computing machine 5 is electrically connected with digital storage oscilloscope 4, for gathering and store the ELECTROMAGNETIC RADIATION SIGNATURE of digital storage oscilloscope record, and carries out analysis to ELECTROMAGNETIC RADIATION SIGNATURE and obtains secret information.This electromagnetic signal detector 3 can adopt electromagnetic probe or self-control coil; This crypto chip 1 communicates with computing machine 5 by USB or serial ports; This computing machine 5 communicates with digital storage oscilloscope 4 by USB.
The emi analysis system that the present embodiment provides, obtains and cipher key related information by measuring the change of crypto chip peripheral electromagnetic field.The collection of ELECTROMAGNETIC RADIATION SIGNATURE and the collection difference of power loss signal are not need resistance in series in the current supply circuit of crypto chip, after determining crypto chip work location, electromagnetic signal detector is put in its near surface, send computing machine to carry out key distribution with contactless collection electromagnetic signal, this electromagnetic signal detector can be measured local electromagnetic radiation, as the ALU (ALU) of data compact district, bus etc., by electromagnetic signal detector being placed near surveyed assembly, accurately can measure the electromagnetic radiation situation that this assembly is independent, therefore not easily there is the situation of " by mistake alert " in this emi analysis system, effectively can improve the probability of success of attack, meanwhile, the division emi analysis according to electromagnetic radiation induction field and radiation field not only can carry out near field, and also can carry out in far field, thus the disguise of assailant is better.Finally, electromagnetism curve, to acquisition interface not requirement, can build attack or test platform more quickly to the safety chip of special circuit (as non-7816/14443 interface); In addition, because emi analysis can walk around the measure of the anti-power consumption analysis that equipment is taked, therefore when power consumption analysis cannot be implemented, emi analysis still can successfully realize.
Crypto chip 1 in the present embodiment refers to by the chip attacked, and computing machine 5 can be configured the equipment in system, and by too net and digital storage oscilloscope 4 set up communication mechanism.For the ease of communication, crypto chip 1 carries out interactive communication by the USB on development board or serial ports and computing machine 5, or replace with single-chip microcomputer encryption, the decryption oprerations of carrying out cryptographic algorithm, oscillograph gathers Wave data and sends computing machine to, computing machine, to data analysis and treament, carries out emi analysis.
The present embodiment, for the collection of near field electromagnetic signal, can adopt the near field probes RF-R400 of LangerEMV-Technik company (or adopting difference detector to connect self-control induction copper coil), be placed horizontally at about 0.5cm place above chip under test during measurement; For far field electromagnetic signals collecting, can adopt wideband electromagnetic receiver (or TEMPEST receiver), receiver antenna is placed in 0.5cm place or farther.For the electromagnetic radiation situation of measurement components, need place very little probe near assembly, its diameter should be less than the scope of surveyed assembly.Due in the smart card of standard, the size of each assembly only has hundreds of micron, and in order to isolate the impact between different assembly, the size of probe must be less than this value.Probe can select hard disc magnetic head, inductor, magnetic coil etc., but usually uses home built external diameter to be 150 ~ 500um, and the solenoid made by copper stranded conductor can obtain good measured value.Coil outer diameter size all has a significant impact the signal effect gathered with the winding number of turn and apart from the position of chip to be measured.The diameter of solenoid is less, and the number of turn is more, nearer apart from the distance of chip to be measured, and the electromagnetic signal density of collection is larger, and effect is better.
Data collector can adopt memory-type digital oscilloscope, first by RS232 interface to chip provide random expressly and input, when running cryptographic algorithm, trigger oscillographic device record electromagnetic leakage signal, and control oscillograph and transmit electromagnetic waveforms data to PC by USB in real time, move in circles to collecting all data, so that subsequent analysis.At present, in integrated circuit (IC) chip, the work of every one-level door is generally less than 1ns flip-flop transition, and clock frequency is also between several million to tens, and therefore, sampling rate needs to reach more than 100MHz, for high-speed chip, needs hundreds of MHz and even upper GHz.The 4 passage DPO7104 type digital fluorescence oscilloscopes that digital storage oscilloscope 4 in the present embodiment can use Imtech to produce.It has the function such as power measurement and analysis, spectrum analysis, investigation transient behavior, towards the 3.5GHz bandwidth of serial application and digital application, 4 passages can realize real-time sampling speed up to 10GSa/s.Record length is up to 400M sampling point simultaneously, has the maximum wave capture speed of 250000wfms/s.
The step of oscillograph image data comprises:
(1) computing machine by serial port setting by download program to development board, start oscillograph simultaneously, carry out the collection of waveform;
(2) data that oscillograph gathers are analyzed;
(3) the data data analysis software of oscillograph collection is analyzed, and draw sample graph;
(4) by the analysis gathering rear figure, the electromagnetism curvilinear figure of cryptographic algorithm is depicted.
In the present embodiment, electromagnetic signal triggering mode can adopt and add trigger pip codes implement writing in encryption and decryption operation program process, can observe electromagnetism curve in single trigger pip, collects data.
Trigger pip be can represent encryption chip duty input or output signal, in systems in which, adopt outer triggering signal.The trigger pip of an oscillographic digital channel sample, when detecting that namely the Significant Change (rising edge or negative edge) of trigger pip starts sampling.Before tested program starts, a certain for single-chip microcomputer pin (as PORTA.0) is put 1, then runs tested program, oscillograph starts to gather simultaneously, is set to 0 by this pin after having run, and send to oscillograph and stop trigger pip, oscillograph stops gathering.Waveform corresponding when this pin is high level is tested program waveform, this completes a complete waveform acquisition process.
In the present embodiment, this crypto chip 1 can adopt AVRATmega16 single-chip microcomputer to substitute, electromagnetic signal detector 3 can adopt self-control coil, during measurement, self-control solenoid is positioned over single-chip microcomputer top, make the ELECTROMAGNETIC RADIATION SIGNATURE in the single-chip microcomputer course of work convert voltage signal to by solenoid, utilize digital storage oscilloscope collection.ATmega16 is low-power consumption 8 CMOS microcontrollers, based on strengthen AVRRISC structure, its instruction set and single clock cycle very advanced for instruction time.ATmega16 can slow down the contradiction of Single Chip Microcomputer (SCM) system between processing speed and electromagnetic leakage up to the data throughput of 1MIPS/MHz.The 5V voltage of single chip circuit is provided by stabilized voltage supply, and computing machine CodeVisionAVR software and AVRStudio4 running software program, run download program to single-chip microcomputer by RS232 serial ports.Oscillograph probe connects unit PORTA.0 port and is used for triggering, and trigger pip is arranged in a program, and another probe connects solenoid and is used for gathering electromagnetic information.
The present embodiment additionally provides the method utilizing this emi analysis system to carry out emi analysis, and the method comprises:
The plaintext that crypto chip 1 receiving computer 5 sends or ciphertext, and after encryption and decryption operation is carried out to received plaintext or ciphertext, result is back to computing machine 5;
Electromagnetic signal detector 3 sends trigger pip to digital storage oscilloscope 4 by triggering line, and notice digital storage oscilloscope 4 gathers electromagnetic data;
Digital storage oscilloscope storage 4 to gather electromagnetic data (electromagnetism curve and data) process, simultaneously by electromagnetic data transmission to computing machine 5;
By data analysis software, analyzing and processing is carried out to the electromagnetic data received in computing machine 5.
The method of the emi analysis that the present embodiment provides, send computing machine to carry out key distribution with contactless collection electromagnetic signal, can measure local electromagnetic radiation, accurately measure the electromagnetic radiation situation that this assembly is independent, therefore not easily there is the situation of " by mistake alert " in this emi analysis system, effectively can improve the probability of success of attack.
A series of detailed description listed is above only illustrating for feasibility embodiment of the present utility model; they are also not used to limit protection domain of the present utility model, all do not depart from the utility model skill equivalent implementations of doing of spirit or change all should be included within protection domain of the present utility model.
To those skilled in the art, obvious the utility model is not limited to the details of above-mentioned one exemplary embodiment, and when not deviating from spirit of the present utility model or essential characteristic, can realize the utility model in other specific forms.Therefore, no matter from which point, all should embodiment be regarded as exemplary, and be nonrestrictive, scope of the present utility model is limited by claims instead of above-mentioned explanation, and all changes be therefore intended in the implication of the equivalency by dropping on claim and scope are included in the utility model.
Claims (4)
1. an emi analysis system for crypto chip, is characterized in that, comprising: crypto chip, stabilized voltage supply, electromagnetic signal detector, digital storage oscilloscope and computing machine; Described crypto chip is electrically connected with described computing machine, the plaintext sent for receiving computer or ciphertext, and expressly will return ciphertext or plaintext through encryption or decryption processing backcasting machine; Described stabilized voltage supply is electrically connected with described crypto chip, for powering for described crypto chip; Described electromagnetic signal detector and described crypto chip are of coupled connections, for gathering the ELECTROMAGNETIC RADIATION SIGNATURE that crypto chip is revealed; Described digital storage oscilloscope is electrically connected with described electromagnetic signal detector, for recording the ELECTROMAGNETIC RADIATION SIGNATURE that electromagnetic signal detector gathers; Described computing machine is electrically connected with described digital storage oscilloscope, for gathering and store the ELECTROMAGNETIC RADIATION SIGNATURE of described digital storage oscilloscope record, and carries out analysis to ELECTROMAGNETIC RADIATION SIGNATURE and obtains secret information.
2. the emi analysis system of a kind of crypto chip according to claim 1, is characterized in that, described electromagnetic signal detector is electromagnetic probe or self-control coil.
3. the emi analysis system of a kind of crypto chip according to claim 1, is characterized in that, described crypto chip is communicated with described computing machine by USB or serial ports.
4. the emi analysis system of a kind of crypto chip according to claim, is characterized in that, described computing machine is communicated with described digital storage oscilloscope by USB.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520395367.8U CN204759426U (en) | 2015-06-09 | 2015-06-09 | Electromagnetism analytic system of crypto chip |
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| CN201520395367.8U CN204759426U (en) | 2015-06-09 | 2015-06-09 | Electromagnetism analytic system of crypto chip |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104992114A (en) * | 2015-06-09 | 2015-10-21 | 北京电子科技学院 | Analytic system and method of electromagnetism based on inserted-type cipher chip |
| CN109270434A (en) * | 2018-03-13 | 2019-01-25 | 深圳市海旭飞科技有限公司 | Detection probe |
| CN109270435A (en) * | 2018-03-13 | 2019-01-25 | 深圳市海旭飞科技有限公司 | Detection device |
| CN111351992A (en) * | 2020-02-20 | 2020-06-30 | 南方电网科学研究院有限责任公司 | Chip security assessment method based on electromagnetic side channel analysis and related device |
-
2015
- 2015-06-09 CN CN201520395367.8U patent/CN204759426U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104992114A (en) * | 2015-06-09 | 2015-10-21 | 北京电子科技学院 | Analytic system and method of electromagnetism based on inserted-type cipher chip |
| CN109270434A (en) * | 2018-03-13 | 2019-01-25 | 深圳市海旭飞科技有限公司 | Detection probe |
| CN109270435A (en) * | 2018-03-13 | 2019-01-25 | 深圳市海旭飞科技有限公司 | Detection device |
| CN111351992A (en) * | 2020-02-20 | 2020-06-30 | 南方电网科学研究院有限责任公司 | Chip security assessment method based on electromagnetic side channel analysis and related device |
| CN111351992B (en) * | 2020-02-20 | 2022-08-02 | 南方电网科学研究院有限责任公司 | Chip security assessment method based on electromagnetic side channel analysis and related device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151111 Termination date: 20160609 |