CN202857130U - PCB security protection board and PCB security protection device - Google Patents
PCB security protection board and PCB security protection device Download PDFInfo
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- CN202857130U CN202857130U CN 201220514913 CN201220514913U CN202857130U CN 202857130 U CN202857130 U CN 202857130U CN 201220514913 CN201220514913 CN 201220514913 CN 201220514913 U CN201220514913 U CN 201220514913U CN 202857130 U CN202857130 U CN 202857130U
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Abstract
The utility model relates to a PCB security protection board which is provided with a surface layer, a first inner layer, a second inner layer and a bottom layer sequentially from top to bottom. The surface layer is provided with a non-sensitive signal through hole connected with the first inner layer, the second inner layer and the bottom layer and is further provided with a non-sensitive signal through hole connected with the first inner layer; the first inner layer is provided with a sensitive signal protection wire and a sensitive signal through hole connected with the second inner layer; the second inner layer is provided with a sensitive signal protection wire and a sensitive signal through hole connected with the bottom layer; and sensitive signal access point solder pads, sensitive signal output point solder pads and two sensitive signal protection solder pads are distributed on the bottom layer. The second sensitive signal protection solder pad is arranged in the first sensitive signal protection solder pad, and the sensitive signal access point solder pads and the sensitive signal output point solder pads are arranged in the second sensitive signal protection solder pad. By adopting the structure, a self-destruction control circuit will be triggered to work to automatically destruct related controlled circuits and information and to ensure the information security once short circuit or the like occurs to the sensitive signal wires and the solder pads.
Description
Technical field
The utility model relates to a kind of protection field of electronic circuit, relates in particular to a kind of PCB safeguard protection plate and the PCB safety guard of the financial fields such as financial transaction, E-Payment.
Background technology
In present electronics applications field; such as the electronic equipment in POS machine, code keypad, ATM and other financial field; system's sensitive signal all needs to be subject to strict protection as the system bus signal of the keyboard signal part of input personal identification number, storage system key, self-destruction attack detecting signal etc.
In the patent of Chinese utility model patent 201532882U publication number; a kind of improvement structure of keyboard circuit protection device is disclosed; the keyboard pcb board that comprises machine shell and be provided with the protection cabling; this keyboard pcb board is provided with the button golden finger; the top of described keyboard pcb board covers one deck and is covered with the flexible circuit board of protecting cabling; the bottom surface of described flexible circuit board is provided with the protection pad, this protection pad respectively with described flexible circuit board on the protection cabling and the protection cabling on the keyboard PCB be electrically connected.Its advantage is: as a kind of improvement of existing keyboard circuit protection device; with the protection cabling of flexible circuit board with being connected of protection cabling become simpler on the keyboard pcb board; connect more reliable; simultaneously will prevent taking off again post; also will be pressed in addition the top of described protection pad; can will prevent taking off protection is integrated with the keyboard circuit protection device set; simple and reasonable and ingenious; in addition; also key-press welding plate is integrated on the flexible circuit board; can save the setting of pad sheet paster, make structure simpler, but also more laborsaving can make button the time; feel is better; but this technical scheme only will be prevented taking off protection and will be integrated with the keyboard circuit protection device set, fail to protect MEMORY and MCU for the storage sensitive data, and the MEMORY and the MCU that are used for the storage sensitive data also need other protection mechanism and structure.The applicant is in the patent of 201846524U at publication number; a kind of improvement structure of pcb board circuit protection device is disclosed; comprise machine shell and be provided with the pcb board of protecting cabling; this pcb board is provided with the button golden finger; the top of described pcb board covers one deck and is covered with the flexible circuit board of protecting cabling; the bottom surface of described flexible circuit board is provided with the protection pad; this the protection pad respectively with described flexible circuit board on the protection cabling and the protection cabling on the pcb board be electrically connected; it is characterized in that: be provided with an enclosure space that is surrounded by described protection cabling between described flexible circuit board and the described pcb board, be provided with MEMORY and MCU for the storage sensitive data in the described space.The utility model combines the MEMORY that is used for the storage sensitive data on pcb board circuit protection device and the pcb board and the protection of MCU, and is simple and reasonable and ingenious, reduced like this module of pcb board circuit protection device.
In the prior art, protection is the anti-contact of taking off that is provided with a plurality of connection protection cablings at the keyboard pcb board basically for sensitive signal, and conductive rubber is pressed on anti-taking off on the contact by machine shell, makes the anti-testing circuit conducting of taking off.If the assailant attempts full wafer when opening machine shell and attacking keyboard; conductive rubber is just taken off the contact and is unclamped with anti-; cause that the anti-testing circuit of taking off opens circuit etc., thereby trigger related mechanism to wipe the sensitive data information of main frame, sensitive data information has just obtained effective protection like this.Simultaneously; in order effectively to prevent the attack for single button on the keyboard; can be in the situation that do not touch the anti-contact of taking off such as the assailant; use sharp other instruments such as pocket knife; excavate each button; until manifest keyboard golden finger in the PCB printed board; thereby the attack of being correlated with; distort to obtain the attack pattern of personal identification number; the positive film key protection of adopting with self-destruction attack protection circuit of button PCB printed board; in case attempt to attack single keyboard signal, the anti-detection above it, checking circuit short circuit; thereby trigger related mechanism to wipe the sensitive data information of main frame, sensitive data information has just obtained effective protection like this.
The front portion of complete machine has obtained effective security protection by the way, for the protected mode from the back side, generally prevents taking off pad by arranging, and bonnet conductive rubber pressing pad will trigger attack in case bonnet is opened, and remove sensitive data information.The PCB at its back side adopts the HDI multiple sliding cover, and the attack detecting signal is attempted to flick off sensitive signal by special prosecutor formula at internal layer labyrinth cabling, must walk around signal to attack and could realize.To a certain extent, this attack pattern need to consume larger cost.But, in existing circuit design, as long as PCB is ground, analyze and shield the starting point of the labyrinth cabling of PCB.After the shielding, the attack detecting signal of other labyrinth cablings has lost the effect of original safeguard protection except starting point.
Summary of the invention
The purpose of this utility model is to provide a kind of security protection technology, and via hole and the cabling of safety signal are accomplished safer protection, increases the difficulty of outside world, improves the data security coefficient of protected PCB.
The purpose of this utility model can be by following structure realization, and PCB safeguard protection plate sequentially is provided with top layer, the first internal layer, the second internal layer and bottom from top to down; Described top layer is provided with first a non-sensitive signal via that connects the first internal layer, the second internal layer and bottom; Also be provided with the second non-sensitive signal via that another connects the first internal layer on the described top layer; Described the first internal layer is provided with sensitive signal protection cabling and connects the sensitive signal via hole of the second internal layer; Described the second internal layer is provided with sensitive signal protection cabling and connects the sensitive signal via hole of bottom; Described bottom is distributed with sensitive signal access point pad, sensitive signal output point pad and two sensitive signal protection pads; Be provided with the second sensitive signal protection pad in described the first sensitive signal protection pad, be provided with sensitive signal access point pad, sensitive signal output point pad in described the second sensitive signal protection pad.
Described the first sensitive signal protection pad ground connection, described the second sensitive signal protection pad connects power supply, is provided with plural sensitive signal access point pad and plural sensitive signal output point pad in described the second sensitive signal protection pad.
Described the first sensitive signal protection pad connects power supply, and described the second sensitive signal protection pad ground connection is provided with plural sensitive signal access point pad and plural sensitive signal output point pad in described the second sensitive signal protection pad.
Described the first sensitive signal protection pad and the second sensitive signal protection pad are frame type or annular.
For reaching above-mentioned technical purpose, the utility model provides another kind of embodiment based on technique scheme: the PCB safety guard: it comprises PCB safeguard protection plate, SAM clamp, mainboard, keypad; Described SAM clamp is provided with the pad of corresponding PCB safeguard protection plate, and the soldering of described PCB safeguard protection plate is connected on the SAM clamp; Described SAM clamp is electrically connected with mainboard by socket or cable, and places the below of mainboard; The below of described keypad is provided with IC-card, and described keypad top is furnished with the flexible circuit board of one deck protection cabling, and described flexible circuit board top correspondence is provided with rubber key; Described keypad is electrically connected with mainboard by socket or cable, and places the top of mainboard.
Adopt above structure; utilize non-sensitive signal via and the cabling on the top layer of PCB safeguard protection plate; sensitive signal via hole and cabling for detection of protection are distributed in respectively the first internal layer and the second internal layer; the protection pad of protection PCB is arranged on bottom; thereby the starting point that better prevents the PCB cabling is attacked; the sensitive signal via hole of protected pcb board is distributed between the pad; if the assailant attempts to attack from five faces of PCB safeguard protection plate; must walk around the protection cabling of laminated construction; in case following any one situation occurs: the first sensitive signal protection pad and the second sensitive signal protection pad short circuit or the second sensitive signal protection pad and sensitive signal output point occur and occur occurring short circuit occurring between short circuit or two above sensitive signal output points between short circuit or two above sensitive signal access points; all will trigger the work of self-destruction control circuit; the relevant controlled circuit of auto-destruct and information are to guarantee the information security of equipment.Next uses the PCB protective device of PCB baffle; when no matter the assailant attempts from any one side attack of mainboard; the circuit of PCB safety guard inside all will move to detect and be attacked, and the while is the relevant controlled circuit of auto-destruct and information in the lump, guarantee the information security of equipment.
Description of drawings
Below in conjunction with the drawings and specific embodiments the utility model is described in further details;
Fig. 1 is the laminated construction schematic diagram of PCB safeguard protection plate of the present utility model;
Fig. 2 is the pad structure schematic diagram of PCB safeguard protection plate of the present utility model;
Fig. 3 is the schematic diagram of the embodiment one of PCB safeguard protection plate of the present utility model;
Fig. 4 is the schematic diagram of the embodiment two of PCB safeguard protection plate of the present utility model;
Fig. 5 is the blast structural representation of PCB safety guard of the present utility model.
Embodiment
Such as Fig. 1 or shown in Figure 2, a kind of PCB safeguard protection of the utility model plate 5 sequentially is provided with top layer 1, the first internal layer 2, the second internal layer 3 and bottom 4 from top to down; Described top layer 1 is provided with first a non-sensitive signal via 11 that connects the first internal layer 2, the second internal layer 3 and bottom 4; Also be provided with the second non-sensitive signal via 12 that another connects the first internal layer on the described top layer 1; Described the first internal layer 2 is provided with sensitive signal protection cabling and connects the sensitive signal via hole 21 of the second internal layer 3; Described the second internal layer 3 is provided with sensitive signal protection cabling and connects the sensitive signal via hole 31 of bottom 4; Described bottom 4 is distributed with sensitive signal access point pad 41, sensitive signal output point pad 42 and two sensitive signal protection pads; Be provided with the second sensitive signal protection pad 44 in described the first sensitive signal protection pad 43, be provided with sensitive signal access point pad 41, sensitive signal output point pad 42 in described the second sensitive signal protection pad 44.
Described the first sensitive signal protection pad 43 ground connection; described the second sensitive signal protection pad 44 connects power supply, is provided with plural sensitive signal access point pad 41 and plural sensitive signal output point pad 42 in described the second sensitive signal protection pad 44.
Described the first sensitive signal protection pad 43 connects power supply; described the second sensitive signal protection pad 44 ground connection are provided with plural sensitive signal access point pad 41 and plural sensitive signal output point pad 42 in described the second sensitive signal protection pad 44.
Such as Fig. 3, Fig. 4 or shown in Figure 5, described the first sensitive signal protection pad 43 and the second sensitive signal protection pad 44 are frame type or annular.5 solderings of PCB safeguard protection plate are on the surface of SAM clamp 6, are distributed between the second sensitive signal protection pad 44 and the sensitive signal access point pad 41 on the sensitive signal via hole space of the corresponding PCB safeguard protection plate 5 on the SAM clamp 6 and the second sensitive signal is protected between pad 44 and the sensitive signal output point pad 42.
In a single day following any one situation appears in such scheme: the first sensitive signal protection pad 43 and the second sensitive signal protection pad 44 short circuit or the second sensitive signal protection pad 43 and sensitive signal output point 42 occur and occur occurring short circuit occurring between short circuit or two above sensitive signal output points 42 between short circuit or two above sensitive signal access points 41; all will trigger the work of self-destruction control circuit; the relevant controlled circuit of auto-erasing and information are to guarantee the information security of equipment.
As shown in Figure 5, based on the PCB safety guard of PCB safeguard protection plate: it comprises PCB safeguard protection plate 5, SAM clamp 6, mainboard 7, keypad 8, and sequentially assembling; Described SAM clamp 6 is provided with the pad of corresponding PCB safeguard protection plate 5, and 5 solderings of described PCB safeguard protection plate are connected on the SAM clamp 6; Described SAM clamp 6 is electrically connected with mainboard 7 by socket or cable, and places the below of mainboard 7; The below of described keypad 8 is provided with IC-card 81, and described keypad 8 tops are furnished with the flexible circuit board 9 of one deck protection cabling, and described flexible circuit board 9 top correspondences are provided with rubber key 10; Described keypad 8 is electrically connected with mainboard 7 by socket or cable, and places the top of mainboard 7.Also be provided with on the keypad and prevent taking off protective device, this device is disconnected, and also will trigger the work of self-destruction control circuit, and the relevant controlled circuit of auto-erasing and information are to guarantee the information security of equipment.
Claims (5)
1. a PCB safeguard protection plate is characterized in that: sequentially be provided with from top to down top layer, the first internal layer, the second internal layer and bottom; Described top layer is provided with first a non-sensitive signal via that connects the first internal layer, the second internal layer and bottom; Also be provided with the second non-sensitive signal via that another connects the first internal layer on the described top layer; Described the first internal layer is provided with sensitive signal protection cabling and connects the sensitive signal via hole of the second internal layer; Described the second internal layer is provided with sensitive signal protection cabling and connects the sensitive signal via hole of bottom; Described bottom is distributed with sensitive signal access point pad, sensitive signal output point pad and two sensitive signal protection pads; Be provided with the second sensitive signal protection pad in described the first sensitive signal protection pad, be provided with sensitive signal access point pad, sensitive signal output point pad in described the second sensitive signal protection pad.
2. a kind of PCB safeguard protection plate according to claim 1; it is characterized in that: described the first sensitive signal protection pad ground connection; described the second sensitive signal protection pad connects power supply, is provided with plural sensitive signal access point pad and plural sensitive signal output point pad in described the second sensitive signal protection pad.
3. a kind of PCB safeguard protection plate according to claim 1; it is characterized in that: described the first sensitive signal protection pad connects power supply; described the second sensitive signal protection pad ground connection is provided with plural sensitive signal access point pad and plural sensitive signal output point pad in described the second sensitive signal protection pad.
4. a kind of PCB safeguard protection plate according to claim 1 is characterized in that: described the first sensitive signal protection pad and the second sensitive signal protection pad are frame type or annular.
5. based on the PCB safety guard of claim 1,2,3 or 4 described PCB safeguard protection plates: it comprises PCB safeguard protection plate, SAM clamp, mainboard, keypad; Described SAM clamp is provided with the pad of corresponding PCB safeguard protection plate, and the soldering of described PCB safeguard protection plate is connected on the SAM clamp; Described SAM clamp is electrically connected with mainboard by socket or cable, and places the below of mainboard; The below of described keypad is provided with IC-card, and described keypad top is furnished with the flexible circuit board of one deck protection cabling, and described flexible circuit board top correspondence is provided with rubber key; Described keypad is electrically connected with mainboard by socket or cable, and places the top of mainboard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220514913 CN202857130U (en) | 2012-09-29 | 2012-09-29 | PCB security protection board and PCB security protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220514913 CN202857130U (en) | 2012-09-29 | 2012-09-29 | PCB security protection board and PCB security protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202857130U true CN202857130U (en) | 2013-04-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220514913 Expired - Lifetime CN202857130U (en) | 2012-09-29 | 2012-09-29 | PCB security protection board and PCB security protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202857130U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112669544A (en) * | 2020-12-21 | 2021-04-16 | 福建新大陆支付技术有限公司 | Novel safety cover plate wiring method and application thereof |
-
2012
- 2012-09-29 CN CN 201220514913 patent/CN202857130U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112669544A (en) * | 2020-12-21 | 2021-04-16 | 福建新大陆支付技术有限公司 | Novel safety cover plate wiring method and application thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130403 |