Adapter card for smart card security analysis
By designing the chip substrate and contact structure of the adapter card, combined with the variable capacitor group, the problem of inconvenience of portability and easy interface failure of the smart card analysis seat is solved, and the stable exposure of the integrated circuit and efficient safety analysis are achieved.
Patent Information
- Application Number
- CN202422247527.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-09-13
AI Technical Summary
In the prior art, the smart card analysis seat is not convenient to carry, the interface is prone to failure, and the analyzer is difficult to get close to the integrated circuit for safety analysis, resulting in reduced analysis efficiency and accuracy.
An adapter card is designed, including a sheet-shaped substrate, ISO7816 contacts, a common ground detection point, a VCC detection point, an I/O detection point and an integrated circuit window. By fixedly connecting the sheet-shaped substrate and the deck, contacts that facilitate contacts of the test instrument are set, and the stable operation of the integrated circuit is maintained through a variable capacitance group.
It realizes stable exposure of smart card integrated circuits, facilitates the access of safety analysis instruments, improves analysis efficiency and result accuracy, and solves the problems of inconvenience in carrying and interface failure.
Smart Images
Figure CN223140177U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the fields of integrated circuits and information security, and particularly relates to an adapter card for smart card security analysis. Background Art
[0002] A smart card is a common type of card with an integrated circuit encapsulated inside, compliant with the ISO7816 standard, and is commonly used in bank cards, embedded systems, mobile terminals, etc., and is usually used as a carrier for identity authentication and encryption / decryption operations. To protect the internal integrated circuit and corresponding components of the smart card during use, the above circuit components are usually placed inside the package.
[0003] During the test and analysis process, in order to perform security analysis on the smart card, it is necessary to expose the integrated circuit and its interface signals inside the smart card, but the following problems are faced:
[0004] 1. After the integrated circuit and its interface signals are exposed, the environment where the integrated circuit and the interface are located changes, the electrical parameters change, and its stability is damaged.
[0005] 2. The size of the integrated circuit is usually on the order of 1mm×1mm or smaller, making it difficult for analysis instruments to approach, increasing the difficulty of detection and analysis.
[0006] The existence of the above problems may reduce the efficiency of the security analysis process and the accuracy of the analysis results. Although there are smart card analysis sockets in the prior art, they are large in size, not convenient to carry and store. In addition, their set jacks are connected to the fault injection points, and the jacks are prone to failure after multiple insertions and extractions. Therefore, how to provide an adapter card device that can both match the smart card, is easy to carry, and has no jacks has become an urgent problem to be solved. Summary of the Utility Model
[0007] The utility model provides an adapter card for smart card security analysis, which is used to solve the problem in the prior art that during security analysis, the stability is damaged due to the change of the environment where the integrated circuit in the smart card is located when the integrated circuit needs to be exposed, and also solve the problem that it is not easy for the analyzer to approach the integrated circuit, and solve the problem that the smart card analysis socket in the prior art is not convenient to carry and the interface is prone to failure.
[0008] To achieve the above purpose, the technical solution of the utility model provides an adapter card for smart card security analysis, including: a sheet-shaped substrate, ISO7816 contacts, a common ground detection point, a VCC detection point, a card holder, I / O detection points, and an integrated circuit window. The sheet-shaped substrate is fixedly connected to the card holder; the ISO7816 contacts, the common ground detection point, the VCC detection point, and the I / O detection points are arranged on the sheet-shaped substrate; the integrated circuit window is opened on the sheet-shaped substrate or the card holder.
[0009] Preferably, and more preferably, each of the ISO7816 contacts is located on the sheet substrate, on the same side or different sides of the card holder.
[0010] Preferably, and more preferably, when the integrated circuit opening is formed on the sheet substrate, the position of the card holder corresponding to the integrated circuit opening is hollowed out.
[0011] Preferably, and more preferably, when the integrated circuit opening is formed on the card holder, the upper surface of the substrate is attached to the back surface of the card holder.
[0012] Preferably, and more preferably, it further includes a four - way switch and a capacitor bank, and the four - way switch and the capacitor bank are arranged between the VCC and the common - ground detection point.
[0013] Preferably, and more preferably, each of the four - way switches and the corresponding capacitor in the capacitor bank are respectively connected between the VCC signal and the GND signal of the integrated circuit.
[0014] Preferably, and more preferably, the number of the ISO7816 contacts is at least 8.
[0015] The technical solution of the present utility model provides an adapter card for smart card security analysis, including: a sheet substrate, ISO7816 contacts, a common - ground detection point, a VCC detection point, a card holder, an I / O detection point, and an integrated circuit opening. The sheet substrate is fixedly connected to the card holder; the ISO7816 contacts, the common - ground detection point, the VCC detection point, and the I / O detection point are arranged on the sheet substrate; the integrated circuit opening is formed on the sheet substrate or the card holder.
[0016] The advantages of the present utility model are that the integrated circuit and its interface signals can be exposed, enabling the security analysis instrument to approach the integrated circuit for detection and analysis. It has a variable capacitor bank, which can keep the exposed integrated circuit operating stably. By using a sheet base, it solves the problem that the smart card analysis seat in the prior art is not convenient to carry. By setting contacts that are convenient for the probe of the test instrument to contact, it solves the problem that the analyzer is not easy to approach the integrated circuit, and solves the problem that the interface is prone to failure. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following - described drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.
[0018] Figure 1 The following is a schematic structural diagram of the adapter card - AA type for smart card security analysis provided by the present utility model.
[0019] Figure 2 For Figure 1 the top view.
[0020] Figure 3 The following is a schematic structural diagram of the adapter card - AB type for smart card security analysis provided by the present utility model.
[0021] Figure 4 For Figure 3 the top view.
[0022] Figure 5 The following is a schematic circuit diagram of the variable capacitor bank in the adapter card for smart card security analysis provided by the present utility model. Detailed implementation manners
[0023] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0024] First, the structure of the present utility model will be described. As Figure 1 and Figure 3 shown, it includes: a sheet substrate 101, ISO7816 contacts 102, a common ground detection point 103, a five-hole VCC detection point 104, a three-hole VCC detection point 105, a card holder 106, I / O detection points 108, a four-position switch, a capacitor bank, and an integrated circuit opening 107.
[0025] The sheet substrate 101 is fixedly connected to the card holder 106 (which can be further fixed by bolts, buckles, etc.). The sheet substrate 101 is used to carry all the components in the technical solution of the present utility model. Its thickness and width conform to the ISO7816 standard, and its length dimension is produced according to actual use (non-standard dimension). The following components are distributed on the sheet substrate: ISO7816 contacts 102, a common ground detection point 103, a five-hole VCC detection point 104, a three-hole VCC detection point 105, and I / O detection points 108. The integrated circuit opening 107 is opened on the sheet substrate 101 or the card holder 106.
[0026] Each ISO7816 contact 102 is located on the sheet substrate 101, on the same side of the card holder 106 on the sheet substrate 101 or the card holder 106 and the ISO7816 contact 102 are respectively arranged on the front and back sides of the sheet substrate 101, and the number of ISO7816 contacts 102 is at least 8. Specifically Figure 1 Shown is the card holder of the AA type adapter card, and its ISO7816 contact 102 and the card holder 106 are on the same side of the sheet substrate 101, Figure 3 For the card holder of the AB type adapter card, its ISO7816 contact 102 and the card holder 106 are respectively located on both sides of the front and back of the substrate.
[0027] Figure 1 The ISO7816 contacts 102 in Figure 3 The ISO7816 contacts 102 in are all contacts that conform to the ISO7816 standard, usually composed of at least 8 metal contacts, and are used for contact connection with the card reading device.
[0028] Such as Figure 1 Shown, when the integrated circuit window 107 is opened on the card holder 106, the upper surface of the sheet substrate 101 is attached to the back surface of the card holder 106, the card holder 106 protrudes from the plane where the sheet substrate 101 is located, and the integrated circuit window 107 is on the same side as each contact detection point.
[0029] Such as Figure 3 Shown, when the integrated circuit window 107 is opened on the sheet substrate 101, the position of the card holder 106 corresponding to this integrated circuit window 107 is hollowed out, facilitating the smart card to be exposed on the surface of the sheet substrate 101 where each contact detection point is located.
[0030] The four - way switch and the capacitor group are arranged between the VCC and the common - ground detection points, close to the card holder. The four - way switch and each capacitor in the capacitor group are in parallel. Specifically, as Figure 5 Shown, the four - way switch S1, the four - way switch S2, the four - way switch S3, and the four - way switch S4 are respectively connected to the corresponding capacitors C1, C2, C3, and C4.
[0031] Figure 1 And Figure 2 The common - ground detection point 103 in and is an equipotential metal connected to the GND signal of the integrated circuit in the smart card to be measured in the card holder, with its surface exposed and uncoated, and is distributed in a double - sided mirror image on the front and back of the sheet substrate, and is used for connection with the analysis instrument.
[0032] Figure 1 And Figure 3The five - hole VCC detection point 104 and the three - hole VCC detection point 105 are both equipotential metal interfaces connected to the VCC signal of the integrated circuit in the smart card to be tested in the card holder. They can be used not only for fault injection into the VCC signal of the integrated circuit but also for monitoring the VCC signal. Further, a 5 - hole connector can be installed at the five - hole VCC detection point 104, and a 3 - hole connector can be installed at the three - hole VCC detection point 105, which is convenient for connecting to an analysis instrument for security analysis.
[0033] Figure 1 The card holder 106 of the AA - type adapter card shown and Figure 2 The card holder 106 of the AB - type adapter card shown are both fixed seats for the smart card to be tested. The smart card to be tested can be inserted into the interior of the card holder 106. At this time, the integrated circuit inside the smart card is wrapped inside the card holder 106.
[0034] The integrated circuit can be seen through the integrated - circuit window 107 inside the smart card to be tested. Specifically, the integrated - circuit window 107 is a window made to expose the integrated circuit inside the smart card.
[0035] Among them, the integrated - circuit window 107 is a window made on the upper surface of the card holder 106, which is applicable to Figure 1 the card holder of the AA - type adapter card shown; Figure 2 The integrated - circuit window 107 of the card holder of the AB - type adapter card shown is a window made from the sheet - like substrate 101 to the upper surface of the card holder 106 (the direction of "up" is defined as the direction perpendicular to the substrate and upward). Through the integrated - circuit window 107, the integrated circuit of the smart card to be tested is exposed, and the analysis instrument can be placed on the window to be close to the integrated circuit at a short distance, which is convenient for the staff to perform security analyses such as fault injection or side - channel analysis.
[0036] The I / O detection point 108 is an equipotential metal connection hole connected to the I / O signal of the integrated circuit. It can not only perform fault injection into the I / O signal of the integrated circuit after being plugged / contacted with a test instrument but also be used for the staff to monitor the I / O signal after being plugged / contacted with the test instrument. The I / O detection point 108 can be installed with a 3 - hole connector, which is convenient for connecting to an analysis instrument for security analysis.
[0037] As Figure 5 shown, the capacitor bank 110 is composed of 4 capacitors, which are respectively adapted to Figure 1 the AA - type adapter card shown and Figure 2 the AB - type adapter card shown. Capacitors C1, C2, C3, and C4 with different capacitance values are respectively connected to the VCC signal and the GND signal of the integrated circuit through the corresponding four - way switches S1, four - way switches S2, four - way switches S3, and four - way switches S4. Specifically, as Figure 5As shown, it forms a variable capacitor bank for providing an appropriate regulated capacitance value to the integrated circuit.
[0038] Specifically, the capacitance values of capacitor C1, capacitor C2, capacitor C3, and capacitor C4 can be taken as a geometric sequence with a common ratio of 2. For example, 100 nF, 220 nF, 470 nF, 1000 nF. The total capacitance C = A1*C1 + A2*C2 + A3*C3 + A4*C4 can be obtained. Among them, the values of coefficient A1, coefficient A2, coefficient A3, and coefficient A4 are as follows: when four-bit switches S1, S2, S3, and S4 are closed, the value is 1; when four-bit switches S1, S2, S3, and S4 are open, the value is 0. Figure 5 The four-bit switches S1, S2, S3, and S4 on the 4 branches shown are switches that can be independently closed or opened. Therefore, through different opening and closing combinations of the four four-bit switches S1, S2, S3, and S4, 16 combinations of the total capacitance C with equal step values can be obtained. The staff can obtain the minimum capacitance value required to maintain the stable operation of the integrated circuit by gradually increasing or decreasing.
[0039] During actual use, the staff uses the probe of the instrument to directly contact or make a close contact between the contacts and detection points on the sheet substrate and the integrated circuit in the smart card through the integrated circuit window opening to achieve the purpose of injection.
[0040] As an adapter card, the present utility model is located between the integrated circuit inside the smart card and the card reader device, exposing the integrated circuit and its interface signals, providing a method and path for the analysis instrument to approach the integrated circuit for security analysis, and can improve the efficiency of the security analysis process and the accuracy of the analysis results.
[0041] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, rather than to limit it; although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; 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 of the present utility model.
Claims
1. An adapter card for smart card security analysis, characterized in that, Comprising: A sheet substrate, ISO7816 contacts, a common ground detection point, a VCC detection point, a card holder, an I / O detection point, and an integrated circuit window opening. The sheet substrate is fixedly connected to the card holder; The ISO7816 contacts, the common ground detection point, the VCC detection point, and the I / O detection point are provided on the sheet substrate; The integrated circuit window opening is provided on the sheet substrate or the card holder.
2. The adapter card according to claim 1, wherein Each of the ISO7816 contacts is located on the sheet substrate, on the same side or different sides of the card holder.
3. The adapter card according to claim 1, characterized in that, When the integrated circuit window opening is provided on the sheet substrate, the position of the card holder corresponding to this integrated circuit window opening is hollowed out.
4. The adapter card according to claim 1, wherein, When the integrated circuit window opening is provided on the card holder, the upper surface of the sheet substrate is attached to the back surface of the card holder.
5. The adapter card according to claim 1, characterized in that, It further includes a four - way switch and a capacitor bank. The four - way switch and the capacitor bank are provided between the VCC and the common ground detection point.
6. The adapter card according to claim 5, wherein Each four - way switch and the corresponding capacitor in the capacitor bank are respectively connected between the VCC signal and the GND signal of the integrated circuit.
7. The adapter card according to claim 1, wherein, The number of the ISO7816 contacts is at least 8.