AU3195695A - Method of ensuring the security of microcontrollers - Google Patents

Method of ensuring the security of microcontrollers

Info

Publication number
AU3195695A
AU3195695A AU31956/95A AU3195695A AU3195695A AU 3195695 A AU3195695 A AU 3195695A AU 31956/95 A AU31956/95 A AU 31956/95A AU 3195695 A AU3195695 A AU 3195695A AU 3195695 A AU3195695 A AU 3195695A
Authority
AU
Australia
Prior art keywords
microcontroller
external
duplicated
aim
read out
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.)
Abandoned
Application number
AU31956/95A
Inventor
Jozsef Bugovics
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.)
ESD VERMOGENSVERWALTUNGSGESELLSCHAFT MBH
Original Assignee
ESD VERMOGENSVERWALTUNGSGESELL
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 ESD VERMOGENSVERWALTUNGSGESELL filed Critical ESD VERMOGENSVERWALTUNGSGESELL
Publication of AU3195695A publication Critical patent/AU3195695A/en
Abandoned legal-status Critical Current

Links

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
    • G06F21/71—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information
    • G06F21/75—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure computing or processing of information by inhibiting the analysis of circuitry or operation
    • 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
    • G06F21/10—Protecting distributed programs or content, e.g. vending or licensing of copyrighted material ; Digital rights management [DRM]
    • G06F21/12—Protecting executable software
    • G06F21/14—Protecting executable software against software analysis or reverse engineering, e.g. by obfuscation
    • 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
    • G06F21/87—Secure or tamper-resistant housings by means of encapsulation, e.g. for integrated circuits

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Physics & Mathematics (AREA)
  • Software Systems (AREA)
  • Computer Security & Cryptography (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Multimedia (AREA)
  • Technology Law (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Storage Device Security (AREA)
  • Burglar Alarm Systems (AREA)
  • Debugging And Monitoring (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Percussion Or Vibration Massage (AREA)
  • Electrotherapy Devices (AREA)

Abstract

The invention concerns a method of ensuring that microcontroller programmes with external memories cannot be read out and that microcontroller assemblies cannot be duplicated. The aim of the invention is to provide a method which, in combination with a simple circuit, makes it possible to produce, under normal component-assembly conditions, any number of selectively identifiable microcontroller assemblies which cannot be copied by non-authorized persons and whose contents cannot be read out or duplicated, and that the manufacturer of such microcontroller units also cannot produce or copy the microcontrollers. This aim is achieved as illustrated, by virtue of the fact that a microcontroller module (1), a microcontroller (2), a selection module (7), an interface (9), an external-programming signal (11), an external PROM (12), a user-specific known production key (19), a production-data set (20) and a transcoding algorithm (21) operate in conjunction with each other in accordance with an internal operating-sequence plan.
AU31956/95A 1994-06-04 1995-05-30 Method of ensuring the security of microcontrollers Abandoned AU3195695A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4419635A DE4419635C2 (en) 1994-06-04 1994-06-04 Microcontroller backup procedures
DE4419635 1994-06-04
PCT/DE1995/000740 WO1995034033A1 (en) 1994-06-04 1995-05-30 Method of ensuring the security of microcontrollers

Publications (1)

Publication Number Publication Date
AU3195695A true AU3195695A (en) 1996-01-04

Family

ID=6519842

Family Applications (1)

Application Number Title Priority Date Filing Date
AU31956/95A Abandoned AU3195695A (en) 1994-06-04 1995-05-30 Method of ensuring the security of microcontrollers

Country Status (6)

Country Link
EP (1) EP0764303B1 (en)
JP (1) JPH10500794A (en)
AT (1) ATE167938T1 (en)
AU (1) AU3195695A (en)
DE (2) DE4419635C2 (en)
WO (1) WO1995034033A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10002203B4 (en) * 2000-01-19 2009-12-10 Robert Bosch Gmbh Method for protecting a microcomputer system against manipulation of data stored in a memory arrangement of the microcomputer system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2149944A (en) * 1983-11-14 1985-06-19 Softnet Inc Software distribution
US4914697A (en) * 1988-02-01 1990-04-03 Motorola, Inc. Cryptographic method and apparatus with electronically redefinable algorithm
DE4019652A1 (en) * 1990-06-20 1992-01-02 Alois Kuhn Protection appts. against unauthorised use of commercial software - combines unique target machine ID with individual security code to produce unique password
GB9121591D0 (en) * 1991-10-11 1991-11-27 Pilkington Micro Electronics Data security arrangement for semiconductor programmable logic devices
US5222133A (en) * 1991-10-17 1993-06-22 Wayne W. Chou Method of protecting computer software from unauthorized execution using multiple keys
DE4138861A1 (en) * 1991-11-26 1992-10-01 Siemens Nixdorf Inf Syst Authentication of electronic card users of communication system - assigning additional identification bits to distinguish between users with same card
US5301231A (en) * 1992-02-12 1994-04-05 International Business Machines Corporation User defined function facility

Also Published As

Publication number Publication date
DE4419635A1 (en) 1995-12-07
ATE167938T1 (en) 1998-07-15
EP0764303B1 (en) 1998-07-01
JPH10500794A (en) 1998-01-20
EP0764303A1 (en) 1997-03-26
DE4419635C2 (en) 1996-08-29
DE59502698D1 (en) 1998-08-06
WO1995034033A1 (en) 1995-12-14

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