JPS57161946A - Microcomputer with protecting mechanism for memory contents - Google Patents
Microcomputer with protecting mechanism for memory contentsInfo
- Publication number
- JPS57161946A JPS57161946A JP56045625A JP4562581A JPS57161946A JP S57161946 A JPS57161946 A JP S57161946A JP 56045625 A JP56045625 A JP 56045625A JP 4562581 A JP4562581 A JP 4562581A JP S57161946 A JPS57161946 A JP S57161946A
- Authority
- JP
- Japan
- Prior art keywords
- dump
- output
- famos
- rom1
- microcomputer
- 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.)
- Pending
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
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F12/00—Accessing, addressing or allocating within memory systems or architectures
- G06F12/14—Protection against unauthorised use of memory or access to memory
- G06F12/1416—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights
- G06F12/1425—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being physical, e.g. cell, word, block
- G06F12/1433—Protection against unauthorised use of memory or access to memory by checking the object accessibility, e.g. type of access defined by the memory independently of subject rights the protection being physical, e.g. cell, word, block for a module or a part of a module
Landscapes
- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Computer Security & Cryptography (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Mathematical Physics (AREA)
- Software Systems (AREA)
- Storage Device Security (AREA)
- Microcomputers (AREA)
- Debugging And Monitoring (AREA)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56045625A JPS57161946A (en) | 1981-03-30 | 1981-03-30 | Microcomputer with protecting mechanism for memory contents |
EP82301475A EP0062438A3 (en) | 1981-03-30 | 1982-03-23 | Microcomputer having memory content protecting means |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56045625A JPS57161946A (en) | 1981-03-30 | 1981-03-30 | Microcomputer with protecting mechanism for memory contents |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57161946A true JPS57161946A (en) | 1982-10-05 |
Family
ID=12724545
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56045625A Pending JPS57161946A (en) | 1981-03-30 | 1981-03-30 | Microcomputer with protecting mechanism for memory contents |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0062438A3 (ja) |
JP (1) | JPS57161946A (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59226961A (ja) * | 1983-06-08 | 1984-12-20 | Nec Corp | マイクロプロセツサ |
JPS6011931A (ja) * | 1983-06-30 | 1985-01-22 | Fujitsu Ltd | ワンチツプマイクロコンピユ−タ |
JPH021019A (ja) * | 1988-12-02 | 1990-01-05 | Hitachi Ltd | 1チップマイクロコンピュータ |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3483410D1 (de) * | 1983-10-14 | 1990-11-22 | Toshiba Kawasaki Kk | Einchip mikrocomputer mit verschluesselbarer funktion des programmspeichers. |
US4494114B1 (en) * | 1983-12-05 | 1996-10-15 | Int Electronic Tech | Security arrangement for and method of rendering microprocessor-controlled electronic equipment inoperative after occurrence of disabling event |
US4823308A (en) * | 1984-02-02 | 1989-04-18 | Knight Technology Ltd. | Microcomputer with software protection |
JPS60177498A (ja) * | 1984-02-23 | 1985-09-11 | Fujitsu Ltd | 半導体記憶装置 |
EP0175487A3 (en) * | 1984-08-23 | 1989-03-08 | Btg International Limited | Software protection device |
GB2165377A (en) * | 1984-09-19 | 1986-04-09 | Itt Ind Ltd | A computer element |
US4812675A (en) * | 1987-04-15 | 1989-03-14 | Exel Microelectronics Incorporated | Security element circuit for programmable logic array |
FR2676294B1 (fr) * | 1991-05-06 | 1993-07-16 | Gemplus Card Int | Procede de verrouillage pour carte a memoire. |
US6237137B1 (en) | 1997-10-15 | 2001-05-22 | Dell Usa, L.P. | Method and system for preventing unauthorized access to a computer program |
US7321957B2 (en) | 2003-10-24 | 2008-01-22 | Intel Corporation | Debugging a trusted component in a system |
WO2006120702A1 (en) * | 2005-05-09 | 2006-11-16 | Trinity Future-In Pvt. Ltd, | An electro - mechanical system for non - duplication of operating system |
US8079092B2 (en) | 2005-07-25 | 2011-12-13 | M/s. Trinity Future—In PVT. Ltd. | Electro-mechanical system for non-duplication of software |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3971916A (en) * | 1974-03-25 | 1976-07-27 | Societe Internationale | Methods of data storage and data storage systems |
FR2401459A1 (fr) * | 1977-08-26 | 1979-03-23 | Cii Honeywell Bull | Support d'information portatif muni d'un microprocesseur et d'une memoire morte programmable |
US4168396A (en) * | 1977-10-31 | 1979-09-18 | Best Robert M | Microprocessor for executing enciphered programs |
-
1981
- 1981-03-30 JP JP56045625A patent/JPS57161946A/ja active Pending
-
1982
- 1982-03-23 EP EP82301475A patent/EP0062438A3/en not_active Withdrawn
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59226961A (ja) * | 1983-06-08 | 1984-12-20 | Nec Corp | マイクロプロセツサ |
JPS6011931A (ja) * | 1983-06-30 | 1985-01-22 | Fujitsu Ltd | ワンチツプマイクロコンピユ−タ |
JPS6313210B2 (ja) * | 1983-06-30 | 1988-03-24 | Fujitsu Ltd | |
JPH021019A (ja) * | 1988-12-02 | 1990-01-05 | Hitachi Ltd | 1チップマイクロコンピュータ |
JPH0431414B2 (ja) * | 1988-12-02 | 1992-05-26 |
Also Published As
Publication number | Publication date |
---|---|
EP0062438A3 (en) | 1984-09-05 |
EP0062438A2 (en) | 1982-10-13 |
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