EP1325674A1 - Boitier de protection d'un dispositif electronique, et procede de collage d'une plaquette de circuit integre sur la surface interieure du boitier - Google Patents

Boitier de protection d'un dispositif electronique, et procede de collage d'une plaquette de circuit integre sur la surface interieure du boitier

Info

Publication number
EP1325674A1
EP1325674A1 EP01971718A EP01971718A EP1325674A1 EP 1325674 A1 EP1325674 A1 EP 1325674A1 EP 01971718 A EP01971718 A EP 01971718A EP 01971718 A EP01971718 A EP 01971718A EP 1325674 A1 EP1325674 A1 EP 1325674A1
Authority
EP
European Patent Office
Prior art keywords
box
box according
circuit board
holes
conductive path
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01971718A
Other languages
German (de)
English (en)
Inventor
Jan Rasmussen
Ole Gadgaard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cryptera AS
Original Assignee
Sagem Denmark AS
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 Sagem Denmark AS filed Critical Sagem Denmark AS
Publication of EP1325674A1 publication Critical patent/EP1325674A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/10—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means together with a coded signal, e.g. in the form of personal identification information, like personal identification number [PIN] or biometric data
    • G07F7/1008—Active credit-cards provided with means to personalise their use, e.g. with PIN-introduction/comparison system
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05G—SAFES OR STRONG-ROOMS FOR VALUABLES; BANK PROTECTION DEVICES; SAFETY TRANSACTION PARTITIONS
    • E05G1/00—Safes or strong-rooms for valuables
    • E05G1/14—Safes or strong-rooms for valuables with means for masking or destroying the valuables, e.g. in case of theft
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/30—Payment architectures, schemes or protocols characterised by the use of specific devices or networks
    • G06Q20/34—Payment architectures, schemes or protocols characterised by the use of specific devices or networks using cards, e.g. integrated circuit [IC] cards or magnetic cards
    • G06Q20/341—Active cards, i.e. cards including their own processing means, e.g. including an IC or chip
    • G—PHYSICS
    • G07—CHECKING-DEVICES
    • G07F—COIN-FREED OR LIKE APPARATUS
    • G07F7/00—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus
    • G07F7/08—Mechanisms actuated by objects other than coins to free or to actuate vending, hiring, coin or paper currency dispensing or refunding apparatus by coded identity card or credit card or other personal identification means
    • G07F7/0806—Details of the card
    • G07F7/0813—Specific details related to card security
    • G07F7/082—Features insuring the integrity of the data on or in the card
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K5/00—Casings, cabinets or drawers for electric apparatus
    • H05K5/02—Details
    • H05K5/0208—Interlock mechanisms; Means for avoiding unauthorised use or function, e.g. tamperproof
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05G—SAFES OR STRONG-ROOMS FOR VALUABLES; BANK PROTECTION DEVICES; SAFETY TRANSACTION PARTITIONS
    • E05G1/00—Safes or strong-rooms for valuables
    • E05G1/005—Portable strong boxes, e.g. which may be fixed to a wall or the like

Definitions

  • the present invention relates to a box for protective encapsulation of electronic circuits carrying confidential information such as passwords, encryption codes etc. Such encapsulation is used e.g. in connection with circuits for encryption of codes in ATM machines and in similar devices carrying confidential information.
  • PCB printed circuit board
  • the intruder can manipulate the exposed conductive paths of the PCB so that further intrusion in the box is possible without the release of the sensor and thus without the deletion of the confidential information.
  • the present invention relates to a box for encapsulating an electronic device, said box comprising
  • said means for detecting the penetration comprising an electronic circuit provided in the box, the electronic circuit comprising at least one electrical conductive path being exposed towards a chemical matter penetrating the box.
  • the box could be of any shape and of any size.
  • the box could be used for encapsulation of a printed circuit board for encryption of pin codes.
  • Such circuit boards are being used in connection with ATM machines for the encryption of the pin codes entered by the customers of the machines.
  • the printed circuit board is carrying vital and of course confidential information that may be retrieved by examining the printed circuit board.
  • An electrical signal transmitted from the keyboard is then transferred directly to the box.
  • the box is provided with means for transferring the signal from the outside of the box to the inside of the box, wherein the signal is received by the printed circuit board.
  • the encryption takes place and the encrypted signal is again transferred from the inside of the box to the outside of the box where the signal is transferred to means for further processing of the transaction.
  • the means for detecting penetration of the box will react upon a chemical or a mechanical destruction of the box.
  • the means for detecting penetration comprises an electrically conductive path or a plurality of electrically conductive paths encircling the printed circuit board that carries the confidential information.
  • the conductive path could be a wire glued onto the inner surface of the box or moulded into the box.
  • the conductive path could also be a conductive material printed onto the inner surface of the box or printed directly onto the outer surface of the circuit carrying the confidential information.
  • the conductive path could also be a conductive material evaporated onto the inner surface of the box or the outer surface of the circuit carrying the confidential information or it could be a number of conductive fibres moulded into the box.
  • the conductive path(s) is being arranged so that any attempt to reach the circuit carrying the confidential information, will result in, that either one or more paths are broken or a number of paths are being interconnected, both results causing that the confidential information is being deleted or causing that the entire circuit carrying the confidential information is being destroyed.
  • the deletion of the information or the destruction of the circuit carrying the information will be carried out by an electronic device connected to the conductive path(s).
  • the path(s) according to the present invention will be exposed towards a chemical matter penetrating the box, such as towards an acid or a base of any kind or having any form - liquid or gas.
  • a chemical matter could be used for decomposing the box so as to reach the circuit carrying the confidential information.
  • the conductive path(s) will be decomposed or destroyed so that the conductivity stops or conductance will occur between a number of paths.
  • Conductance between a number of paths may occur e.g. if the chemical matter is conductive in it self - which typically would be the case for many liquid phase acids.
  • Conductance between a number of paths may also occur e.g. if the chemical matter is decomposing an isolating material arranged between the conductive paths so that the ability of isolating the conductive paths changes.
  • the electronic device can easily measure the change of the isolation and delete the confidential information.
  • the conductive path(s) is made from a material, such as a soft metal, which easily is destroyed by a chemical matter. In that way it may be ensured that even acids in a very low concentration will destroy a path.
  • the conductive path(s) may as an example be provided as a conductive powder suspended in a binder.
  • the binder may be chosen so that it easily dissolves in any liquid which of course leads to a destruction or at least a change in the conductivity.
  • a number of paths are being arranged in an isolating matter which is easily dissolved in the chemical matter or which at least absorbs the chemical matter and thus becomes conductive.
  • the paths could be arranged in a spongy tissue or in similar materials providing isolation sensitive towards the chemical matter.
  • the conductive paths could be arranged in a suspension comprising an isolating powder bound by an easily dissolvable binder.
  • the isolating material could also be provided with through-holes so as to allow the chemical matter to penetrate through the isolating material. In that way the chemical matter would have free access to destroy the conductive path(s), or the chemical matter would more easily be able to conduct an electrical current between a number of paths.
  • the conductive path(s) may be attached to the inner surface of the box by means of an adhesive.
  • the path(s) could preferably be provided on or in a circuit board or a number of circuit boards of either a soft or hard type.
  • a circuit board with a plurality of conductive paths could be glued onto each inner side of the box.
  • Each of the circuit boards could be electrically interconnected so as to transfer an electrical current from one path to another, across the circuit boards and one of the circuit boards could then be connected to the electronic device for deletion of the information upon detection of intrusion.
  • a protective coating may protect the path(s) of the circuit boards, e.g. a varnish sprayed onto the surface of the circuit board.
  • the protective coating easily dissolves in the chemical matter or that through-holes are provided in the coating so as to allow the chemical matter to reach the path(s) or that the protective coating easily absorbs the chemical matter and thus becomes conductive.
  • the path(s) of the circuit board could either be printed onto the circuit board or the path(s) could be evaporated onto the circuit board.
  • At least one conductive path could be provided in one layer of the circuit board whereas a conductive surface is provided in another layer of the circuit board.
  • the layers are being isolated from each other by a material, which easily dissolves in a liquid, which would then cause a short circuit between the path and the surface.
  • a number of paths could be arranged in individual layers of the circuit board, isolated by layers of an isolating material that easily dissolves in a liquid.
  • the glue or similar adhesive used to attach the circuit board with the path(s) to the inner surface of the box is permeable towards the chemical matter, absorbs the chemical matter or in any similar way allows the chemical matter to reach the circuit board with the path(s).
  • the glue may be provided discontinuously over the inner surface of the box so as to allow the chemical matter to penetrate.
  • the glue is provided with through-holes, provided with a density in the size of 1-100 holes pr. cm 2 , such as in the size of 10-90 holes pr cm 2 , such as in the size of 20-80 holes pr cm 2 , such as in the size of 30-70 holes pr cm 2 , such as in the size of 40-60 holes pr cm 2 .
  • the holes may be uniformly distributed in the adhesive but it is even more advantageous if the holes are provided randomly. In that way it is very difficult for an intruder to predict where the glue will protect the path(s) from the chemical matter and thus where the box may be destroyed without deleting the confidential information.
  • the glue may preferably comprise a substance selected from the group consisting of:
  • the box may preferably be made from a material or a composition of materials selected from the group consisting of:
  • the present invention relates to a method for gluing a circuit board onto the inner surface of a box so that through-holes are provided in the glue, said method comprising providing a perforated sheet of glue between the circuit board and the inner surface of the box and by influence of heat, gluing the circuit board onto the inner surface of the box.
  • the sheet of glue could be provided with holes either uniformly or randomly distributed in the sheet of glue.
  • the heating of the glue could preferably be combined with providing a pressure in order to press the circuit board against the inner surface of the box.
  • Fig. 1 shows an exploded view of a half side of a box according to the present invention
  • Fig. 2 shows an exploded view of a half side of the box including an electronic circuit carrying the confidential information.
  • the box comprises a plate 1; in the shown example the plate is the closure of the box.
  • the sensor PCB in the form of a flexible PCB 3 is glued onto the plate by the use of a glue-plate 2.
  • the plate 1 is made from moulded zinc while the flexible printed circuit board is made from Kapton.
  • the glue-plate is a pre-preg type comprising fibreglass-reinforced tissues with an epoxy hardener.
  • the glue-plate is positioned against the zinc plate and the flexible PCB is positioned above the glue-plate. Influenced by a high pressure and temperature the PCB will be glued together with the zinc plate.
  • the glue-plate is provided with a plurality of small holes in a suitable mutual distance and the flexible printed circuit board is covered with a soldering mask also provided with holes.
  • the holes of the soldering mask are arranged adjacent to the holes of the glue-plate. Thereby it is achieved that the pattern of conductive path arranged in the PCB is exposed in the direction towards the zinc plate.
  • the thickness of the glue-plate prevents the conductive path from being in contact with the zinc plate.
  • Fig. 2 shows another exploded view of the box including a closure 1 of the box, a glue- plate 2, the flexible print 3, a guiding plate 4, a pair of two elastomer connectors 5 and 6 and a PCB 7 comprising the circuit that carries the information which is to be protected.
  • the flexible PCB 3 On the side facing the closure 1 , the flexible PCB 3 is covered with a pattern of conductive paths having two through-going conductive paths in a complex arrangement.
  • a plan ground-connection surface is arranged on the rear-side of the flexible PCB.
  • the elastomer connectors 5 and 6 provides a contact between the flexible PCB 3 and the PCB 7.
  • the guiding plate 4 provides a correct positioning of the elastomer connectors 5 and 6.
  • a circuit arranged on the PCB 7 constantly measures that the paths of the PCB 3 are conductive and that the isolation between the individual path of the PCB 3 or the isolation between the paths and the ground-connection surface is above a pre-determined value.
  • the circuit will detect any interruption of the conductivity of the paths or detect changes of the isolation value and react by deleting the confidential information.
  • the plate 1 could be made of any material such as metal, plastic or ceramics.
  • the glue- plate could be made with a glue comprising epoxy, acrylic, polyurethane or adhesive rubber or any other means of adhesive.
  • the senor PCB could be of a flexible or non-flexible type and the soldering mask could be omitted in the area where the sensor PCB is in contact with the glue.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Business, Economics & Management (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Accounting & Taxation (AREA)
  • Strategic Management (AREA)
  • General Business, Economics & Management (AREA)
  • Theoretical Computer Science (AREA)
  • Casings For Electric Apparatus (AREA)

Abstract

L'invention porte sur un boîtier (1) de protection de circuits (7) électroniques renfermant des informations confidentielles telles que des mots de passe, des codes de cryptage etc. Le boîtier comporte un moyen de détection des infractions par destruction chimique ou corrosive des parois, ainsi qu'un moyen d'effacement des informations confidentielles enregistrées dans lesdits circuits (7) en cas de détection d'une infraction. Le moyen de détection d'infractions comporte un circuit électronique (3) placé dans le boîtier (1) muni au moins un cheminement électroconducteur soumis aux produits chimiques pénétrant dans le boîtier (1). L'invention porte également sur un procédé de collage d'une plaquette (3) de circuit sur une surface intérieure du boîtier (1) et de création de vias dans la colle (2).
EP01971718A 2000-09-26 2001-09-26 Boitier de protection d'un dispositif electronique, et procede de collage d'une plaquette de circuit integre sur la surface interieure du boitier Withdrawn EP1325674A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DK200001421 2000-09-26
DKPA200001421 2000-09-26
PCT/DK2001/000612 WO2002028157A1 (fr) 2000-09-26 2001-09-26 Boitier de protection d'un dispositif electronique, et procede de collage d'une plaquette de circuit integre sur la surface interieure du boitier

Publications (1)

Publication Number Publication Date
EP1325674A1 true EP1325674A1 (fr) 2003-07-09

Family

ID=8159738

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01971718A Withdrawn EP1325674A1 (fr) 2000-09-26 2001-09-26 Boitier de protection d'un dispositif electronique, et procede de collage d'une plaquette de circuit integre sur la surface interieure du boitier

Country Status (3)

Country Link
EP (1) EP1325674A1 (fr)
AU (1) AU2001291636A1 (fr)
WO (1) WO2002028157A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109714694A (zh) * 2018-12-27 2019-05-03 瑞声光电科技(常州)有限公司 声学性能测试装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4818986A (en) * 1987-01-27 1989-04-04 Bauman Robert M Apparatus for controlling access to data storage devices
FR2649748B1 (fr) * 1989-07-17 1991-10-11 Axyval Sa Systeme de protection de documents ou d'objets de valeur enfermes dans un contenant inviolable physiquement, qui passe par ailleurs par une succession d'etats logiques authentifies en nombre restreint
DE19600770C2 (de) * 1996-01-11 1997-11-13 Ibm Sicherheitsfolie mit EMV-Schutz
US5877697A (en) * 1997-07-25 1999-03-02 Lucent Technologies Inc. Security system and method for detecting chassis tampering
PT1054316E (pt) * 1999-05-15 2007-01-31 Scheidt & Bachmann Gmbh Dispositivo para a protecção de circuitos electrónicos contra acesso não autorizados
AU2001239854A1 (en) * 2000-02-23 2001-09-03 Iridian Technologies, Inc. Tamper proof case for electronic devices having memories with sensitive information

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO0228157A1 *

Also Published As

Publication number Publication date
AU2001291636A1 (en) 2002-04-08
WO2002028157A1 (fr) 2002-04-04

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