WO2012024995A1 - 防止非法拆卸的加密键盘 - Google Patents

防止非法拆卸的加密键盘 Download PDF

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Publication number
WO2012024995A1
WO2012024995A1 PCT/CN2011/077479 CN2011077479W WO2012024995A1 WO 2012024995 A1 WO2012024995 A1 WO 2012024995A1 CN 2011077479 W CN2011077479 W CN 2011077479W WO 2012024995 A1 WO2012024995 A1 WO 2012024995A1
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WO
WIPO (PCT)
Prior art keywords
main control
control board
protection
removal detection
conductive
Prior art date
Application number
PCT/CN2011/077479
Other languages
English (en)
French (fr)
Inventor
张俊昆
林朱龙
何靖
韩莹
Original Assignee
广州广电运通金融电子股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广州广电运通金融电子股份有限公司 filed Critical 广州广电运通金融电子股份有限公司
Priority to AU2011295579A priority Critical patent/AU2011295579B2/en
Priority to EP11819370.5A priority patent/EP2610823B1/en
Priority to US13/810,415 priority patent/US9043945B2/en
Publication of WO2012024995A1 publication Critical patent/WO2012024995A1/zh

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/82—Protecting input, output or interconnection devices
    • G06F21/83—Protecting input, output or interconnection devices input devices, e.g. keyboards, mice or controllers thereof
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
    • G06F21/86—Secure or tamper-resistant housings
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09C—CIPHERING OR DECIPHERING APPARATUS FOR CRYPTOGRAPHIC OR OTHER PURPOSES INVOLVING THE NEED FOR SECRECY
    • G09C1/00—Apparatus or methods whereby a given sequence of signs, e.g. an intelligible text, is transformed into an unintelligible sequence of signs by transposing the signs or groups of signs or by replacing them by others according to a predetermined system
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2101—Auditing as a secondary aspect
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2221/00—Indexing scheme relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/21—Indexing scheme relating to G06F21/00 and subgroups addressing additional information or applications relating to security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
    • G06F2221/2107—File encryption

Definitions

  • the present invention relates to an encryption keyboard, and more particularly to an encryption keyboard for an automatic rejection machine that enhances prevention of illegal disassembly.
  • the bank's work key and master key are also stored in the core processing part of the keyboard.
  • some lawless elements often steal the user's password by stealing or spying on the keyboard, and even interpret the bank's work key and master key to achieve the ambition of stealing bank information, directly threatening users and bank information, The security of funds.
  • the existing ATM encryption keyboard includes a keyboard panel and a main control board, wherein the main control chip has a removal detection protection circuit in the main chip, and a plurality of removal detection protection circuit pins are formed on the main control board to be removed.
  • each of the removal detection points has two signal contact contacts that are disconnected, and the signal contact contacts are connected to the main chip removal detection protection circuit through the internal wiring of the main control board.
  • Conductive silicone is disposed between the keyboard panel and the main control board contact surface corresponding to the position of the main control board removal detection point.
  • the keyboard panel squeezes the conductive silicone contact and turns on the disconnected detection point on the main control board to form a path; when the keyboard is illegally removed, the conductive silicone leaves the signal contact contact , forming an open circuit and being sensed, and triggering the removal detection protection circuit, causing the keyboard main chip to delete sensitive information, and disabling related functions, thereby preventing criminals from stealing bank data.
  • a waterproof silicone layer is disposed between the keyboard panel and the main control board, and the conductive adhesive is disposed between the waterproof silicone and the main control board.
  • the technology has the following problems:
  • the waterproof silicone material is elastic. The criminals can insert a rigid object close to the gap between the conductive silicone and the panel before removing the keyboard and keep the object and the conductive silicone extruded to keep the conductive silicone continuously conductive.
  • An object of the present invention is to provide an encryption keyboard for preventing illegal disassembly, which is provided with a protection ⁇ at the removal detection point to improve the security of the encryption keyboard.
  • the present invention provides the following technical solutions:
  • the cryptographic keyboard provided by the present invention comprises a button panel and a main control board, wherein the main chip of the main control board is provided with a removal detection protection circuit, and at least a surface of the main control board adjacent to the button panel is drawn at least A removal detection protection circuit pin forms a removal detection point, the removal detection point has two disconnected signal contact contacts, and the two disconnected signal contact contacts are electrically conductively turned on to remove the detection protection The circuit is effective.
  • the periphery of the detection point is disposed with a conductive protection ring.
  • the conductive protection ring is connected to the removal detection protection circuit in the main chip.
  • the conductive protection ring and the periphery of the conductive adhesive are provided with a protection ⁇ .
  • the protection device is provided with at least two grapple hooks, each of which is inserted into a semi-blind hole of the main control board adjacent to one side surface of the button panel, and is fixed to the main control board by welding.
  • the protection raft is a conductive metal ring, and the metal ring is electrically connected with the removal detection protection circuit in the main control board.
  • the protection device is fixed on a periphery of a surface of the button panel adjacent to the main control board corresponding to the conductive protection ring.
  • the protection ⁇ is formed by vertical folding of the edge of the button panel along the direction of the main control board to completely surround the edge of the main control panel during installation.
  • a bottom plate is disposed on a side of the main control board that is away from the button panel, and the protection device is fixed on a periphery of the bottom plate adjacent to the side surface of the main control board corresponding to the position of the conductive protection ring, and the main control board is correspondingly protected.
  • a side plate is disposed on a side of the main control board away from the button panel, and the protection raft is formed by vertical folding of the edge of the bottom plate along the direction of the main control board, so as to completely surround the main control board during installation.
  • a waterproof silicone layer is disposed between the button panel and the main control panel, and the waterproof silicone layer is opposite.
  • a conductive adhesive is inserted into the groove at the position of the conductive paste.
  • the waterproof silicone layer has a groove or a hole for accommodating the protective ridge at a position corresponding to the protection raft.
  • the conductive protection ring and the metal protection ⁇ respectively form an electrical connection with the glue in the main control board to remove the detection and protection circuit;
  • FIG. 1 is a schematic exploded view of an encryption keyboard for preventing illegal disassembly according to the present invention
  • Figure 2 is a partial enlarged view of a portion A in the figure
  • FIG. 3 is a schematic exploded view of an encryption keyboard for preventing illegal disassembly according to the present invention
  • FIG. 4 is a schematic exploded view of three encryption keyboards for preventing illegal disassembly according to the present invention
  • FIG. 5 is a schematic exploded view of four types of encryption keyboards for preventing illegal disassembly according to the present invention
  • FIG. 6 is an exploded view of five encryption keyboards for preventing illegal disassembly provided by the present invention.
  • FIG. 1 is a schematic exploded view of an encryption keyboard for preventing illegal disassembly
  • FIG. 2 is a partial enlarged view of a portion A of the present invention.
  • the encryption keyboard 100 provided by the present invention includes A button panel 101 and a main control board 102 are provided with a removal detection protection circuit (not shown) in the main chip of the main control board 102.
  • the main control board 102 is adjacent to the surface 1 of the button panel 101 side. 021
  • the two pairs of edges lead to at least one removal detection protection circuit pin forming a removal detection point 1022, the removal detection point 1022 has two broken signal contact contacts, and the two disconnected signal contact contacts are electrically conductive
  • the glue 103 is turned on to make the removal detection protection circuit take effect.
  • the peripheral arrangement of the removal detection point 1022 is provided with a protective barrier around the periphery of the conductive protection ring and the conductive paste.
  • the encryption keyboard provided in this embodiment is provided with a waterproof silicone layer 104 between the button panel 101 and the main control board 102.
  • the waterproof silicone layer 104 corresponds to the conductive adhesive 103.
  • the position is provided with an insertion groove in which the conductive paste 103 is embedded.
  • the outer periphery of the conductive protection ring 1 023 of the main control board 102 is respectively soldered and fixed with a semi-enclosed structure hard metal ring protection 1024, the opening of the semi-surround protection 1024 is located to the center of the main control board, and has four grapple hooks. (In this embodiment, four, for example, but not limited to), the grapple is inserted into the semi-blind hole of the main control board 102 adjacent to the side surface 1021 of the button panel, and is inside the main control board.
  • the detection protection circuit is removed to form an electrical connection.
  • the periphery of the embedded slot of the conductive silicone 103 has a slot 1 041, and the shape of the slot 1041 matches the protection 1024 1024.
  • the thickness of the hard metal ring protection 1024 is equivalent to that of the waterproof silicone 104.
  • the design can effectively prevent the illegal molecules from inserting a metal piece from the gap between the conductive silicone 103 and the removal detecting point 1022 to keep the detection and protection circuit continuously connected; using the conductive protection ring 1023 and the metal protection 1024 respectively Forming an electrical connection with the removal detection protection circuit in the main control board.
  • the circuit changes, thereby making the main control chip perceive and enhancing the encryption keyboard. The attacking ability of the lawless molecules to inject the conductive silica gel from the gap between the conductive silica gel and the removal detection point is prevented.
  • FIG. 3 is a schematic exploded view of the second encryption preventing keyboard for preventing illegal disassembly.
  • the encryption keyboard 200 includes a button panel 201 , a main control board 202 , and a bottom plate 205 .
  • the main control board The main chip of 202 is provided with a removal detection protection circuit (not shown), and the main control board 202
  • the two pairs of edges of the surface 2021 adjacent to one side of the button panel 201 lead to two removal detection protection circuit pins forming a removal detection point 2022, the removal detection point 2022 having two broken signal contact contacts, two The disconnected signal contact contact is turned on by the conductive paste 203 to effect removal of the detection protection circuit.
  • the cryptographic keyboard provided in this embodiment is provided with a waterproof silicone layer 204 between the button panel 201 and the main control board 202.
  • the waterproof silicone layer 204 is disposed corresponding to the position of the conductive adhesive 203.
  • the bottom plate 205 is attached to the back surface of the main control board 202, and is provided with a protection ⁇ 2051 corresponding to the outer periphery of the conductive protection ring 2023 of the main control board 202.
  • the protection ⁇ 2051 may be soldered on the bottom plate 205 or the same bottom plate.
  • the 205 is integrally molded to protect the opening of the cymbal 2051 toward the center of the main control board 202.
  • a slot 2024 is defined in the periphery of the conductive protection ring 2023 of the main control board 202, and a slot 2041 is formed in the periphery of the embedded slot of the conductive silicone 203 on the waterproof silicone 204.
  • the slot 2024 and the slot 2041 are shaped to match the protection ⁇ 2051, and the semi-circumferential conductive silicone 203 and the conductive protection ring 2023.
  • the thickness of the protective cover 2051 is equal to the sum of the thicknesses of the waterproof silicone 204 and the main control board 202.
  • the protection ⁇ 2051 removes the detection point 2022 from the three sides of the flank, and is in close contact with the button panel 201, ensuring that the removal detection point 2022 is not attacked from the outside, effectively preventing the illicit molecules from being closely attached to the slat of the conductive silicone and the panel.
  • a hard object attacks the side of the encryption keyboard.
  • the encryption keyboard 300 includes a button panel 301, a main control board 302, and a bottom plate 305.
  • the main control board 302 is mainly A removal detection protection circuit (not shown) is disposed in the chip, and two pairs of edges of the surface 3021 of the main control board 302 adjacent to the button panel 301 lead to two removal detection protection circuit pins to form a removal detection point. 3022, the removal detection point 3022 has two disconnected signal contact contacts, and the two disconnected signal contact contacts are turned on by the conductive adhesive 303 to make the removal detection protection circuit take effect.
  • the encryption keyboard provided in this embodiment is provided with a waterproof silicone layer between the button panel 301 and the main control board 302. 304.
  • the waterproof silicone layer 304 is provided with an embedding groove embedded with the conductive adhesive 303 at a position corresponding to the conductive adhesive 303.
  • the bottom plate 305 is attached to the back surface of the main control board 302, and its four sides are vertically folded to form a protection ⁇ 3051.
  • the thickness of the protection ⁇ 3051 is equal to the sum of the thicknesses of the waterproof silicone 304 and the main control board 302.
  • the protection ⁇ 3051 surrounds the main control board 302 from four sides and is in close contact with the key panel 301, so as to ensure that the removal detection point 3022 is not attacked from the outside, effectively preventing the illegal molecules from being closely attached to the gap between the conductive silicone and the panel to insert a hard object to encrypt. Side spying attacks on the keyboard.
  • a fourth embodiment of the present invention provides an encryption keyboard 400 for preventing illegal disassembly.
  • the encryption keyboard 400 of the present invention includes a button panel 401, a waterproof silicone 404 and a main control board 402.
  • the main chip of the control board 402 is provided with a removal detection protection circuit (not shown).
  • the two pairs of edges of the main control board 402 adjacent to the surface of the button panel 401 lead to two removal detection protection circuit pins.
  • the detection point 4022 is removed, the removal detection point 4022 has two broken signal contact contacts, and the two broken signal contact contacts are electrically conducted by the conductive paste 403 to make the removal detection protection circuit effective.
  • the periphery of the detection point 4022 is removed from a conductive protection ring 4023 that is isolated therefrom, and the conductive protection ring 4023 communicates with the removal detection protection circuit in the main chip.
  • the conductive adhesive 403 is embedded in the waterproof silicone layer 404 adjacent to the embedding groove on the surface of the main control board.
  • the outer surface of the conductive protection ring 4022 of the button panel 401 is fixedly provided with a semi-enclosed structure of a rigid metal ring protection ⁇ 4012.
  • the opening of the semi-surrounding protection ⁇ 4012 is at a central position of the main control board, and is fixed to the key panel 401 by welding or integral molding. connection.
  • the thickness of the hard metal ring protection ⁇ 4012 is equivalent to that of the waterproof silicone 404.
  • the present invention provides five schematic diagrams for decomposing an encryption keyboard for preventing illegal disassembly.
  • the cryptographic keyboard 500 provided by the invention includes a button panel 501, a waterproof silicone 504 and a main control board 502.
  • the main chip of the main control board 502 is provided with a removal detection protection circuit (not shown).
  • the two pairs of edges of the main control board 502 adjacent to the surface of the button panel 501 lead to two removal detection protection circuit pins forming a removal detection point 5022, and the removal detection point 5022 has two broken signal contacts.
  • the contacts, the two open signal contact contacts are turned on by the conductive paste 503 to enable the removal detection protection circuit.
  • the periphery of the detection point 5022 is removed from a conductive protection ring 5023 that is isolated therefrom, and the conductive protection ring 5023 communicates with the removal detection protection circuit in the main chip.
  • the conductive adhesive 503 is embedded in the embedded groove of the waterproof silicone layer 504 adjacent to the surface of the main control board.
  • the four sides of the button panel 501 are vertically folded up to form a protective cover 5012.
  • the thickness of the protective cover 5012 is equal to the sum of the thicknesses of the waterproof silicone 504 and the main control board 502.
  • the protective cover 5012 completely surrounds the edges of the waterproof silicone 504 and the main control board 502, and is closely fixed together with the button panel.
  • the protection ⁇ 5012 surrounds the edge of the main control board 502 from four sides and is in close contact with the main control board 502, ensuring that the removal detection point 5022 is not attacked from the outside, effectively preventing the criminals from being in close contact with the slat of the conductive silicone and the panel to insert a rigid object. Side spying attacks on the cryptographic keyboard.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Software Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Input From Keyboards Or The Like (AREA)
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Description

防止非法拆卸的加密键盘
本申请要求于 201 0 年 8 月 27 日提交中国专利局、 申请号为 201 01 02694 34. 3、 发明名称为 "防止非法拆卸的加密键盘 "的中国专利申请的 优先权， 其全部内容通过引用结合在本申请中。
技术领域 本发明涉及一种加密键盘，特别涉及一种自动拒员机用增强防止非法拆卸 的加密键盘。
背景技术
由于银行自助设备的硬加密键盘，承担着用户银行密码的输入和加密处理 工作， 因此在键盘的核心处理部分还存储有银行的工作密钥和主密钥。有些不 法分子为了达到不可告人的目的， 常通过撬取或刺探键盘来窃取用户密码， 甚 至解读银行的工作密钥、 主密钥， 达到窃取银行资料的野心， 直接威胁到用户 和银行资料、 资金的安全。
现有的 ATM加密键盘包括键盘面板及主控板，其中主控板内主芯片内设有 移除检测保护电路，并在主控板上引出有若干个移除检测保护电路引脚形成移 除检测点，每个移除检测点有断开的两个信号接触触点，信号接触触点通过主 控板内部走线接通主芯片移除检测保护电路。在键盘面板与主控板接触面上对 应与该主控板移除检测点位置之间设有导电硅胶。当键盘被安装在 ATM安装面 板上时，键盘面板挤压导电硅胶接触并导通主控板上断开的移除检测点， 形成 通路； 当键盘被非法拆除时， 导电硅胶离开信号接触触点， 形成断路而被感应 到， 并触发移除检测保护电路， 使键盘主芯片删除敏感信息， 并且禁用相关功 能， 从而防止不法分子窃取银行资料。
现有技术中往往为了使加密键盘具有一定的防水性而在键盘面板与主控 板之间设有一层防水硅胶，导电胶设置于防水硅胶与主控板之间。该技术存在 如下问题： 防水硅胶材质为弹性的， 不法分子在拆除键盘前可以紧贴导电硅胶 与面板的夹缝插入一硬性物件并且保持该物件与导电硅胶的挤压，以保持导电 硅胶持续导通移除检测保护电路，从而拆除键盘而不被发觉； 或者从导电硅胶 与移除检测点之间的空隙插入一金属片保持移除检测保护电路持续连通；或者 从导电硅胶与移除检测点之间的空隙灌入导电胶水，保持移除检测保护电路持 续连通。在非法拆卸情况下保持加密键盘不会自毁而非法窃取用户密码， 甚至 解读银行的工作密钥、 主密钥， 达到窃取银行资料的野心， 直接威胁到用户和 银行资料、 资金的安全。
发明内容
本发明目的在于提供一种防止非法拆卸的加密键盘，通过在在移除检测点 处设有保护圏， 以提升加密键盘的安全性。
为了实现本发明目的， 本发明提供如下技术方案：
本发明所提供的这种加密键盘， 包括一按键面板及一主控板， 该主控板的 主芯片内设有移除检测保护电路，并在主控板临近按键面板一侧的表面引出至 少一个移除检测保护电路引脚形成移除检测点，所述移除检测点有两个断开的 信号接触触点，两个断开的信号接触触点由导电胶导通使移除检测保护电路生 效， 该移除检测点的外围设置与其隔离的导电保护环， 该导电保护环连通主芯 片内的移除检测保护电路， 所述导电保护环和导电胶的外围设有一保护圏。
可选的， 所述保护圏设置至少两个抓钩，每个抓钩插入到主控板临近按键 面板一侧表面的半盲孔内， 并通过焊接与主控板固定。
进一步的， 所述保护圏为导电金属环， 该金属环与主控板内移除检测保护 电路形成电连接。
可选的，所述保护圏固设于按键面板临近主控板一侧表面对应导电保护环 的位置外围。
可选的， 所述保护圏由按键面板边缘沿着主控板方向的垂直折起构成， 以 便在安装时完全围住所述主控板边缘。
可选的， 所述主控板远离按键面板的一侧设置一底板， 所述保护圏固设于 底板临近主控板一侧表面对应导电保护环的位置外围，所述主控板对应保护圏 的位置处设有槽孔。
可选的， 所述主控板远离按键面板的一侧设置一底板， 所述保护圏由底板 边缘沿着主控板方向的垂直折起构成， 以便在安装时完全围住所述主控板边 优选的， 所述按键面板与主控板之间设有一防水硅胶层， 该防水硅胶层对 应导电胶的位置处设有导电胶嵌入槽。
进一步的，所述防水硅胶层对应保护圏的位置处开有容纳该保护圏的槽或 孔。
本发明所提供的技术方案与现有技术相比具有如下优点：
1、 在导电保护环外围固定安装保护圏， 有效阻止不法分子紧贴导电硅胶 与面板的夹缝插入一硬性物件的攻击； 插入一金属片保持移除检测保护电路持续连通的攻击；
3、 导电保护环、 金属保护圏分别与主控板内移除检测保护电路形成电连 胶水的攻击；
4、 使用金属材质作为防护圏， 可以有效阻止不法分子加热融化此防护圏 的攻击。
附图说明 图 1是本发明所提供一种防止非法拆卸的加密键盘分解示意图；
图 2是图中 A部的局部放大图；
图 3是本发明所提供第二种防止非法拆卸的加密键盘分解示意图； 图 4是本发明所提供三种防止非法拆卸的加密键盘分解示意图；
图 5是本发明所提供四种防止非法拆卸的加密键盘分解示意图； 以及 图 6是本发明所提供五种防止非法拆卸的加密键盘分解示意图。
具体实施方式 下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清 楚、 完整地描述， 显然， 所描述的实施例仅仅是本发明优选的实施例， 而不是 全部的实施例。基于本发明中的实施例， 本领域普通技术人员在没有作出创造 性劳动前提下所获得的所有其他实施例， 都属于本发明保护的范围。
参阅图 1和图 2 , 图 1是本发明所提供一种防止非法拆卸的加密键盘分解 示意图， 图 2是图中 A部的局部放大图， 本发明所提供的这种加密键盘 100 , 其包括一按键面板 101及一主控板 102 , 该主控板 102的主芯片内设有移除检 测保护电路（图中未示出）， 该主控板 102临近按键面板 1 01一侧的表面 1 021 的两对边缘引出至少一个移除检测保护电路引脚形成移除检测点 1022 , 所述 移除检测点 1022有两个断开的信号接触触点， 两个断开的信号接触触点由导 电胶 103导通使移除检测保护电路生效。 移除检测点 1022的外围设置与其隔 所述导电保护环和导电胶的外围设有一保护圏。
为了使加密键盘具有一定的防水功能，本实施例中所提供的加密键盘在按 键面板 1 01和主控板 1 02之间设有一防水硅胶层 104 , 该防水硅胶层 104对应 导电胶 1 03的位置设有嵌入导电胶 1 03的嵌入槽。
主控板 102上导电保护环 1 023的外周围分别焊接固定安装有半包围结构 硬性金属环保护圏 1024 , 该半包围保护圏 1024的开口向主控板中心位置， 且 其具有四个抓钩 （本实施例以四个为例， 至少为两个， 但并不限于此）， 该抓 钩插入到主控板 102临近按键面板一侧表面 1021的半盲孔内， 并与主控板内 移除检测保护电路形成电连接。在防水硅胶 104上导电硅胶 103的嵌入槽外围 开设槽位 1 041 , 槽位 1041形状与保护圏 1024吻合。
硬性金属环保护圏 1024的厚度与防水硅胶 104相当， 当该键盘通过按键 面板 101上的螺柱 1011固定装配在一起时， 按键面板 101和主控板 102挤压 中间的防水硅胶层 104及硬性金属环保护圏 1024 , 将其紧密的固定在一起， 硬性金属环保护圏 1024与主控板 102、 按键面板 101之间均没有空隙， 确保 移除检测点 1022不被来自外侧刺探攻击， 有效阻止不法分子紧贴导电硅胶与 面板的夹缝插入一硬性物件对加密键盘的侧面刺探攻击。
另外，该种设计可以有效阻止不法分子从导电硅胶 103与移除检测点 1022 之间的空隙插入一金属片保持移除检测保护电路持续连通的攻击；采用导电保 护环 1023和金属保护圏 1024分别与主控板内移除检测保护电路形成电连接， 当导电保护环 1023和金属保护圏 1024任意一个与移除检测点导通时都会造成 电路的改变，从而使主控芯片感知，增强加密键盘阻止不法分子从导电硅胶与 移除检测点之间的空隙灌入导电硅胶胶水的攻击能力。
请一并参阅图 3 , 是本发明所提供第二种防止非法拆卸的加密键盘分解示 意图，该加密键盘 200 ,其包括一按键面板 201、一主控板 202以及一底板 205 , 该主控板 202的主芯片内设有移除检测保护电路（图中未示出），该主控板 202 临近按键面板 201一侧的表面 2021的两对边缘引出两个移除检测保护电路引 脚形成移除检测点 2022 , 所述移除检测点 2022有两个断开的信号接触触点， 两个断开的信号接触触点由导电胶 203导通使移除检测保护电路生效。移除检 测点 2022的外围设置与其隔离的导电保护环 2023 , 该导电保护环 2023连通 主芯片内的移除检测保护电路。 为了使加密键盘具有一定的防水功能， 本实施 例中所提供的加密键盘在按键面板 201 和主控板 202之间设有一防水硅胶层 204 , 该防水硅胶层 204对应导电胶 203的位置处设有嵌入导电胶 203的嵌入 槽。
其中所述底板 205附着在主控板 202背面，其对应与主控板 202的导电保 护环 2023位置外围设有保护圏 2051 , 该保护圏 2051 可以是焊接在底板 205 上，也可以是同底板 205铸为一体，保护圏 2051开口向主控板 202中心位置。 分别在主控板 202的导电保护环 2023外围开设槽位 2024 , 在防水硅胶 204上 导电硅胶 203的嵌入槽外围开设槽位 2041。 槽位 2024和槽位 2041形状与保 护圏 2051吻合， 半包围导电硅胶 203及导电保护环 2023。 保护圏 2051的厚 度等于防水硅胶 204和主控板 202 的厚度之和， 当该键盘通过按键面板 201 上的螺柱 2011固定装配在一起时， 按键面板 201和底板 205挤压中间层的防 水硅胶 204及主控板 202 , 将其紧密的固定在一起。 保护圏 2051从侧翼三个 面半包围移除检测点 2022 , 与按键面板 201紧密接触， 确保移除检测点 2022 不被来自外侧刺探攻击，有效阻止不法分子紧贴导电硅胶与面板的夹缝插入一 硬性物件对加密键盘的侧面刺探攻击。
参阅图 4 , 是本发明所提供第三种防止非法拆卸的加密键盘分解示意图， 该加密键盘 300 , 其包括一按键面板 301、 一主控板 302以及一底板 305 , 该 主控板 302的主芯片内设有移除检测保护电路（图中未示出）， 该主控板 302 临近按键面板 301一侧的表面 3021的两对边缘引出两个移除检测保护电路引 脚形成移除检测点 3022 , 所述移除检测点 3022有两个断开的信号接触触点， 两个断开的信号接触触点由导电胶 303导通使移除检测保护电路生效。移除检 测点 3022的外围设置与其隔离的导电保护环 3023 , 该导电保护环 3023连通 主芯片内的移除检测保护电路。 为了使加密键盘具有一定的防水功能， 本实施 例中所提供的加密键盘在按键面板 301 和主控板 302之间设有一防水硅胶层 304 , 该防水硅胶层 304对应导电胶 303的位置处设有嵌入导电胶 303的嵌入 槽。
其中所述底板 305附着在主控板 302背面，其四边垂直折起构成一保护圏 3051 , 该保护圏 3051的厚度等于防水硅胶 304和主控板 302的厚度之和， 当 该键盘通过按键面板 301上的螺柱 3011固定装配在一起时， 按键面板 301和 底板 305挤压中间层的防水硅胶 304及主控板 302 , 保护圏 3051完全包围防 水硅胶 304及主控板 302边缘， 与按键面板一同紧密固定。 保护圏 3051从四 面包围主控板 302 , 并与按键面板 301 紧密接触， 确保移除检测点 3022不被 来自外侧刺探攻击，有效阻止不法分子紧贴导电硅胶与面板的夹缝插入一硬性 物件对加密键盘的侧面刺探攻击。
参阅图 5 , 本发明所提供第四种防止非法拆卸的加密键盘分解示意图， 本 发明所提供的这种加密键盘 400 , 其包括一按键面板 401、 防水硅胶 404及一 主控板 402 , 该主控板 402的主芯片内设有移除检测保护电路（图中未示出 ), 该主控板 402临近按键面板 401一侧的表面的两对边缘引出两个移除检测保护 电路引脚形成移除检测点 4022 , 所述移除检测点 4022有两个断开的信号接触 触点， 两个断开的信号接触触点由导电胶 403导通使移除检测保护电路生效。 移除检测点 4022的外围设置与其隔离的导电保护环 4023 ,该导电保护环 4023 连通主芯片内的移除检测保护电路。 其中导电胶 403 镶嵌在防水硅胶层 404 临近主控板表面上的嵌入槽。
按键面板 401对应导电保护环 4022的外周围固定设置有半包围结构硬性 金属环保护圏 4012 , 该半包围保护圏 4012的开口向主控板中心位置， 其通过 焊接或一体成型与按键面板 401固定连接。
硬性金属环保护圏 4012的厚度与防水硅胶 404相当， 当该键盘通过按键 面板 401上的螺柱 4011固定装配在一起时， 按键面板 401和主控板 402挤压 中间的防水硅胶层 404及硬性金属环保护圏 4012 , 将其紧密的固定在一起， 硬性金属环保护圏 4012与主控板 402、 按键面板 401之间均没有空隙， 确保 移除检测点 4022不被来自外侧刺探攻击， 有效阻止不法分子紧贴导电硅胶与 面板的夹缝插入一硬性物件对加密键盘的侧面刺探攻击。
参阅图 6 , 本发明所提第供五种防止非法拆卸的加密键盘分解示意图， 本 发明所提供的这种加密键盘 500 , 其包括一按键面板 501、 防水硅胶 504及一 主控板 502 , 该主控板 502的主芯片内设有移除检测保护电路（图中未示出 ), 该主控板 502临近按键面板 501一侧的表面的两对边缘引出两个移除检测保护 电路引脚形成移除检测点 5022 , 所述移除检测点 5022有两个断开的信号接触 触点， 两个断开的信号接触触点由导电胶 503导通使移除检测保护电路生效。 移除检测点 5022的外围设置与其隔离的导电保护环 5023 ,该导电保护环 5023 连通主芯片内的移除检测保护电路。 其中导电胶 503 镶嵌在防水硅胶层 504 临近主控板表面上的嵌入槽。
按键面板 501的四边垂直折起构成一保护圏 5012 , 该保护圏 5012的厚度 等于防水硅胶 504和主控板 502的厚度之和，当该键盘通过按键面板 501上的 螺柱 5011固定装配在一起时， 按键面板 501和主控板 502挤压中间层的防水 硅胶 504 , 保护圏 5012完全包围防水硅胶 504及主控板 502边缘， 与按键面 板一同紧密固定。 保护圏 5012从四面包围主控板 502边缘， 并与主控板 502 紧密接触， 确保移除检测点 5022不被来自外侧刺探攻击， 有效阻止不法分子 紧贴导电硅胶与面板的夹缝插入一硬性物件对加密键盘的侧面刺探攻击。
上述实施例仅示出了几个优选实施方案， 为了提高加密键盘的安全性，根 据需要为加密键盘提供更多的防护层， 这对于本技术领域的普通技术人员来 说， 在不脱离本发明原理的前提下， 根据现有技术可以做出若干改进和润饰， 这些改进和润饰也视为本发明的保护范围。

Claims

权 利 要 求
1、 一种防止非法拆卸的加密键盘， 包括一按键面板及一主控板， 该主控 板的主芯片内设有移除检测保护电路，并在主控板临近按键面板一侧的表面引 出至少一个移除检测保护电路引脚形成移除检测点，所述移除检测点有两个断 开的信号接触触点，两个断开的信号接触触点由导电胶导通使移除检测保护电 路生效， 该移除检测点的外围设置与其隔离的导电保护环， 该导电保护环连通 主芯片内的移除检测保护电路， 其特征在于， 所述导电保护环和导电胶的外围 设有一保护圏。
2、 如权利要求 1所述的加密键盘， 其特征在于， 所述保护圏设置至少两 个抓钩，每个抓钩插入到主控板临近按键面板一侧表面的半盲孔内， 并通过焊 接与主控板固定。
3、 如权利要求 2所述的加密键盘， 其特征在于， 所述保护圏为导电金属 环， 该金属环与主控板内移除检测保护电路形成电连接。
4、 如权利要求 1所述的加密键盘， 其特征在于， 所述保护圏固设于按键 面板临近主控板一侧表面对应导电保护环的位置外围。
5、 如权利要求 1所述的加密键盘， 其特征在于， 所述主控板远离按键面 板的一侧设置一底板，所述保护圏固设于底板临近主控板一侧表面对应导电保 护环的位置外围， 所述主控板对应保护圏的位置处设有槽孔。
6、 如权利要求 1所述的加密键盘， 其特征在于， 所述保护圏由按键面板 边缘沿着主控板方向的垂直折起构成， 以便在安装时完全围住所述主控板边
7、 如权利要求 1所述的加密键盘， 其特征在于， 所述主控板远离按键面 板的一侧设置一底板， 所述保护圏由底板边缘沿着主控板方向的垂直折起构 成， 在安装时完全围住所述主控板边缘。
8、 如权利要求 6或 7所述的加密键盘， 其特征在于， 所述按键面板与主 控板之间设有一防水硅胶层，该防水硅胶层对应导电胶的位置处设有导电胶嵌 入槽。
9、 如权利要求 1-5所述任意一种加密键盘， 其特征在于， 所述按键面板 与主控板之间设有一防水硅胶层，该防水硅胶层对应导电胶的位置处设有导电 胶嵌入槽。
10、 如权利要求 9所述的加密键盘， 其特征在于， 所述防水硅胶层对应保 护圏的位置处开有容纳该保护圏的槽或孔。
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US20130160149A1 (en) 2013-06-20
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