SE500276C2 - Förfarande och anordning för att förhindra extern detektering av signalinformation - Google Patents

Förfarande och anordning för att förhindra extern detektering av signalinformation

Info

Publication number
SE500276C2
SE500276C2 SE9101952A SE9101952A SE500276C2 SE 500276 C2 SE500276 C2 SE 500276C2 SE 9101952 A SE9101952 A SE 9101952A SE 9101952 A SE9101952 A SE 9101952A SE 500276 C2 SE500276 C2 SE 500276C2
Authority
SE
Sweden
Prior art keywords
raster scan
signal sequence
random
signals
random signal
Prior art date
Application number
SE9101952A
Other languages
English (en)
Swedish (sv)
Other versions
SE9101952D0 (sv
SE9101952L (sv
Inventor
Per Lindholm
Original Assignee
Shield Research In Sweden Ab
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 Shield Research In Sweden Ab filed Critical Shield Research In Sweden Ab
Priority to SE9101952A priority Critical patent/SE500276C2/sv
Publication of SE9101952D0 publication Critical patent/SE9101952D0/xx
Priority to US07/824,093 priority patent/US5216713A/en
Priority to EP92914347A priority patent/EP0591393B1/de
Priority to AU22332/92A priority patent/AU2233292A/en
Priority to KR1019930703996A priority patent/KR940701616A/ko
Priority to PCT/SE1992/000464 priority patent/WO1993000757A1/en
Publication of SE9101952L publication Critical patent/SE9101952L/xx
Priority to US08/050,607 priority patent/US5321747A/en
Publication of SE500276C2 publication Critical patent/SE500276C2/sv

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • 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
    • G06F21/84—Protecting input, output or interconnection devices output devices, e.g. displays or monitors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/42—Jamming having variable characteristics characterized by the control of the jamming frequency or wavelength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/80—Jamming or countermeasure characterized by its function
    • H04K3/82—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection
    • H04K3/825—Jamming or countermeasure characterized by its function related to preventing surveillance, interception or detection by jamming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/22—Arrangements for preventing the taking of data from a data transmission channel without authorisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K2203/00—Jamming of communication; Countermeasures
    • H04K2203/10—Jamming or countermeasure used for a particular application
    • H04K2203/14—Jamming or countermeasure used for a particular application for the transfer of light or images, e.g. for video-surveillance, for television or from a computer screen
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/43—Jamming having variable characteristics characterized by the control of the jamming power, signal-to-noise ratio or geographic coverage area
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
    • H04K3/00—Jamming of communication; Counter-measures
    • H04K3/40—Jamming having variable characteristics
    • H04K3/45—Jamming having variable characteristics characterized by including monitoring of the target or target signal, e.g. in reactive jammers or follower jammers for example by means of an alternation of jamming phases and monitoring phases, called "look-through mode"

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Computer Security & Cryptography (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Computing Systems (AREA)
  • Theoretical Computer Science (AREA)
  • Software Systems (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Cleaning In Electrography (AREA)
  • Television Systems (AREA)
  • Picture Signal Circuits (AREA)
SE9101952A 1991-06-24 1991-06-24 Förfarande och anordning för att förhindra extern detektering av signalinformation SE500276C2 (sv)

Priority Applications (7)

Application Number Priority Date Filing Date Title
SE9101952A SE500276C2 (sv) 1991-06-24 1991-06-24 Förfarande och anordning för att förhindra extern detektering av signalinformation
US07/824,093 US5216713A (en) 1991-06-24 1992-01-22 Method and apparatus for preventing extraneous detection of signal information
EP92914347A EP0591393B1 (de) 1991-06-24 1992-06-24 Verfahren und einrichtung zum verhindern der fremdempfängerdetektion einer signalinformation
AU22332/92A AU2233292A (en) 1991-06-24 1992-06-24 A method and an apparatus for preventing extraneous detection of signal information
KR1019930703996A KR940701616A (ko) 1991-06-24 1992-06-24 신호정보의 외부 검출을 방지하는 방법 및 장치
PCT/SE1992/000464 WO1993000757A1 (en) 1991-06-24 1992-06-24 A method and an apparatus for preventing extraneous detection of signal information
US08/050,607 US5321747A (en) 1991-06-24 1993-04-22 Method and apparatus for preventing extraneous detection of signal information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9101952A SE500276C2 (sv) 1991-06-24 1991-06-24 Förfarande och anordning för att förhindra extern detektering av signalinformation

Publications (3)

Publication Number Publication Date
SE9101952D0 SE9101952D0 (sv) 1991-06-24
SE9101952L SE9101952L (sv) 1992-12-25
SE500276C2 true SE500276C2 (sv) 1994-05-24

Family

ID=20383144

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9101952A SE500276C2 (sv) 1991-06-24 1991-06-24 Förfarande och anordning för att förhindra extern detektering av signalinformation

Country Status (6)

Country Link
US (2) US5216713A (de)
EP (1) EP0591393B1 (de)
KR (1) KR940701616A (de)
AU (1) AU2233292A (de)
SE (1) SE500276C2 (de)
WO (1) WO1993000757A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE500276C2 (sv) * 1991-06-24 1994-05-24 Shield Research In Sweden Ab Förfarande och anordning för att förhindra extern detektering av signalinformation
US5631920A (en) * 1993-11-29 1997-05-20 Lexmark International, Inc. Spread spectrum clock generator
US5488627A (en) * 1993-11-29 1996-01-30 Lexmark International, Inc. Spread spectrum clock generator and associated method
US6222926B1 (en) * 1996-12-18 2001-04-24 Philips Electronics North America Corporation Method and device for providing controlled access video signals without providing a signal in the clear
US6226384B1 (en) * 1996-12-18 2001-05-01 Philips Electronics North America Corporation Method and device for providing controlled access video signals without providing a signal in the clear
ATE325478T1 (de) * 1998-01-02 2006-06-15 Cryptography Res Inc Leckresistentes kryptographisches verfahren und vorrichtung
US7587044B2 (en) 1998-01-02 2009-09-08 Cryptography Research, Inc. Differential power analysis method and apparatus
EP1090480B1 (de) * 1998-06-03 2019-01-09 Cryptography Research, Inc. Verbesserungen zu des und anderen kryptographischen verfahren mit leckminimisierung für chipkarten und andere kryptosysteme
CA2334597C (en) * 1998-07-02 2007-09-04 Cryptography Research, Inc. Leak-resistant cryptographic indexed key update
FR2811790A1 (fr) * 2000-07-11 2002-01-18 Schlumberger Systems & Service Microcontroleur securise contre des attaques dites en courant
US6960961B2 (en) * 2003-04-30 2005-11-01 Agilent Technologies, Inc. EMI reduction of oscillating signals by way of controlled randomized modulation
US6784625B1 (en) 2003-04-30 2004-08-31 Agilent Technologies, Inc. EMI reduction of voltage inverters by way of controlled randomized modulation of oscillating signals
US6833693B2 (en) * 2003-04-30 2004-12-21 Agilent Technologies, Inc. EMI reduction of power converters by way of controlled randomized modulation of oscillating signals
US20100283656A1 (en) * 2006-08-24 2010-11-11 Zavrel Jr Robert J Method and system for jamming simultaneously with communication using omni-directional antenna
KR101686435B1 (ko) * 2010-07-12 2016-12-14 삼성전자주식회사 휴대용 단말기에서 전자파 간섭 발생을 방지하기 위한 장치 및 방법

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4217550A (en) * 1962-09-28 1980-08-12 Blassel Pierre P Radio jamming device
CH623271A5 (de) * 1977-11-15 1981-05-29 Hasler Ag
US4342119A (en) * 1980-08-27 1982-07-27 The United States Of America As Represented By The Secretary Of The Air Force Multi-tone jammer
DE3127843A1 (de) * 1981-07-15 1983-05-26 AEG-Telefunken Nachrichtentechnik GmbH, 7150 Backnang Verfahren zur verhinderung von "kompromittierender abstrahlung" bei der verarbeitung und uebertragung geheimer dateninformationen
GB2186466B (en) * 1985-04-19 1989-07-12 Emc Datacare Ltd Security device for a video output unit
GB8608172D0 (en) * 1986-04-03 1986-05-08 Walker S M Computer security devices
US4697157A (en) * 1986-10-17 1987-09-29 Hughes Aircraft Company Inherently flat spectral density pseudorandom noise generator
NO165698C (no) * 1988-07-05 1991-03-20 System Sikkerhet As System for beskyttelse mot avlytting av digitalt utstyr.
SE462935B (sv) * 1989-01-30 1990-09-17 Cominvest Res Ab Saett och anordning foer hindrande av extern detektering av signalinformation
US5086467A (en) * 1989-05-30 1992-02-04 Motorola, Inc. Dummy traffic generation
SE500276C2 (sv) * 1991-06-24 1994-05-24 Shield Research In Sweden Ab Förfarande och anordning för att förhindra extern detektering av signalinformation

Also Published As

Publication number Publication date
KR940701616A (ko) 1994-05-28
US5216713A (en) 1993-06-01
EP0591393A1 (de) 1994-04-13
WO1993000757A1 (en) 1993-01-07
AU2233292A (en) 1993-01-25
SE9101952D0 (sv) 1991-06-24
SE9101952L (sv) 1992-12-25
EP0591393B1 (de) 1999-03-31
US5321747A (en) 1994-06-14

Similar Documents

Publication Publication Date Title
SE500276C2 (sv) Förfarande och anordning för att förhindra extern detektering av signalinformation
CA1235537A (en) Digital display system
EP0642271A1 (de) Videoübertragungsgerät
JPH01218181A (ja) 閉回路テレビジョン装置
KR930017434A (ko) 영상신호강도의 래스터주사된 샘플들을 서브-나이키스트 샘플링하는데 사용하기 위한 디지탈변조기
JP2011041310A (ja) 信号伝送装置
SE462935B (sv) Saett och anordning foer hindrande av extern detektering av signalinformation
US5293231A (en) Apparatus for synchronizing terminal equipment
KR890004570A (ko) 텔레비젼 전송 시스템
KR102080927B1 (ko) 스테레오 영상 생성 방법 및 장치
MX2021008953A (es) Se?al de imagen que representa una escena.
JPH05151114A (ja) 電波盗視防止方式
KR830007020A (ko) 오출력이 없는 키이 신호 발생기
KR920008651B1 (ko) 3중 레벨 사성 펄스 디코더
US20090237506A1 (en) System for Communication Between a Video Image Acquisition Unit and an on-Board Computer for a Motor Vehicle
TH1901003415A (th) เครื่องการภาพระบบการภาพส่วนลำตัวเคลื่อนไหวและซับสเตรทสารกึ่งตัวนำสำหรับการลามิเนต
CN104601941A (zh) 一种球机云台控制系统
JPS55655A (en) Symbol display device for video display equipment
US10791349B2 (en) Frame generation apparatus, frame generation method, image synthesis apparatus, image synthesis method, signal generation apparatus, signal generation method, and image transmission system
JPS5520511A (en) Display unit for picture
US6816631B1 (en) Calculations of coordinates of target image displayed on monitor screen
JP2017069600A (ja) 小型カメラ及び撮像装置
US395508A (en) patten
JPH0771214B2 (ja) テレビジヨンカメラ装置
US716137A (en) Method of simultaneously transmitting and receiving space-telegraph signals.

Legal Events

Date Code Title Description
NUG Patent has lapsed