KR960038623A - How to protect your MC program data - Google Patents

How to protect your MC program data Download PDF

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Publication number
KR960038623A
KR960038623A KR1019950010118A KR19950010118A KR960038623A KR 960038623 A KR960038623 A KR 960038623A KR 1019950010118 A KR1019950010118 A KR 1019950010118A KR 19950010118 A KR19950010118 A KR 19950010118A KR 960038623 A KR960038623 A KR 960038623A
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KR
South Korea
Prior art keywords
program data
mcu
protecting
protect
internal rom
Prior art date
Application number
KR1019950010118A
Other languages
Korean (ko)
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KR0172823B1 (en
Inventor
김보영
Original Assignee
문정환
엘지반도체 주식회사
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.)
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Application filed by 문정환, 엘지반도체 주식회사 filed Critical 문정환
Priority to KR1019950010118A priority Critical patent/KR0172823B1/en
Publication of KR960038623A publication Critical patent/KR960038623A/en
Application granted granted Critical
Publication of KR0172823B1 publication Critical patent/KR0172823B1/en

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    • 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
    • G06F21/60—Protecting data
    • G06F21/62—Protecting access to data via a platform, e.g. using keys or access control rules
    • G06F21/6218—Protecting access to data via a platform, e.g. using keys or access control rules to a system of files or objects, e.g. local or distributed file system or database
    • 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
    • G06F21/60—Protecting data
    • G06F21/602—Providing cryptographic facilities or services

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • General Health & Medical Sciences (AREA)
  • Computer Hardware Design (AREA)
  • Computer Security & Cryptography (AREA)
  • Health & Medical Sciences (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Bioethics (AREA)
  • Databases & Information Systems (AREA)
  • Storage Device Security (AREA)
  • Microcomputers (AREA)

Abstract

본 발명은 MCU(Micro Computer)의 내부 프로그램 메모리에 관한 것으로, 특히 내부 ROM 데이타의 코딩 테스트시에 프로그램 데이타가 효율적으로 보호되도록 한 MCU 프로그램 데이타의 보호방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an internal program memory of a microcomputer (MCU), and more particularly, to a method of protecting MCU program data such that the program data is efficiently protected during the coding test of the internal ROM data.

상기한 같은 본 발명의 MCU 프로그램 데이타의 보호방법은 출력되는 내부 ROM 데이타를 일정규칙에 의해 스크램블링(Scrambling)하여 래치부를 거쳐 순차적으로 출력시키는 것을 특징으로 한다.The method of protecting MCU program data of the present invention as described above is characterized in that the internal ROM data output is scrambled by a predetermined rule and sequentially output through the latch unit.

Description

엠씨유(MCU) 프로그램 데이타의 보호방법How to protect your MC program data

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제2도는 본 발명의 MCU 출력수단부의 구성블럭도, 제3도는 (a)(b)는 본 발명의 MCU 출력단부의 동작타임도.2 is a block diagram of the MCU output means of the present invention, Figure 3 (a) (b) is an operation time diagram of the MCU output end of the present invention.

Claims (3)

M bit MCU 내부의 프로그램 데이타 코딩판독 테스트에 있어서, 출력되는 내부 ROM 데이타를 일정규칙에 의해 스크램블링(Scrambling)하여 래치부를 거쳐 순차적으로 출력시키는 것을 특징으로 하는 MCU 프로그램 데이타의 보호방법.In the program data coding and reading test of the M bit MCU, the method of protecting MCU program data, characterized by scrambling the output internal ROM data by a predetermined rule and sequentially outputting the result via a latch unit. 제1항에 있어서, 스크램블링은 제어신호(OE-R)에 의해 센싱앰프에서 로딩되는 내부 ROM 데이타를 시프트 클럭에 의해 시프트 레지스터에서 MSB를 인버젼하여 LSB로 시프트시켜 출력하는 것으로 이루어짐을 특징으로 하는 MCU 프로그램 데이타의 보호방법The method of claim 1, wherein the scrambling is performed by converting the internal ROM data loaded from the sensing amplifier by the control signal OE-R by shifting the MSB from the shift register to the LSB by the shift clock. How to protect MCU program data 제1항 또는 제2항에 있어서, M bit MCU 내부의 프로그램 데이타 코딩판독 테스트시에 시프트 동작은 1에서 M-1회까지 선택적으로 이루어지는 것을 특징으로 하는 MCU 프로그램 데이타의 보호방법The method for protecting MCU program data according to claim 1 or 2, wherein the shift operation is selectively performed one to M-1 times in a program data coding reading test in the M bit MCU.
KR1019950010118A 1995-04-27 1995-04-27 Protection method of mcu program data KR0172823B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019950010118A KR0172823B1 (en) 1995-04-27 1995-04-27 Protection method of mcu program data

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019950010118A KR0172823B1 (en) 1995-04-27 1995-04-27 Protection method of mcu program data

Publications (2)

Publication Number Publication Date
KR960038623A true KR960038623A (en) 1996-11-21
KR0172823B1 KR0172823B1 (en) 1999-03-30

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Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019950010118A KR0172823B1 (en) 1995-04-27 1995-04-27 Protection method of mcu program data

Country Status (1)

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KR (1) KR0172823B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100468615B1 (en) * 2002-04-02 2005-01-31 매그나칩 반도체 유한회사 Apparatus for protecting internal program

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Publication number Publication date
KR0172823B1 (en) 1999-03-30

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