GB8806452D0 - Digital data security system - Google Patents

Digital data security system

Info

Publication number
GB8806452D0
GB8806452D0 GB8806452A GB8806452A GB8806452D0 GB 8806452 D0 GB8806452 D0 GB 8806452D0 GB 8806452 A GB8806452 A GB 8806452A GB 8806452 A GB8806452 A GB 8806452A GB 8806452 D0 GB8806452 D0 GB 8806452D0
Authority
GB
Grant status
Grant
Patent type
Prior art keywords
digital
data
security
system
digital data
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
Application number
GB8806452A
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.)
Imperial College of Science Technology and Medicine
IMPERIAL COLLEGE
Original Assignee
Imperial College of Science Technology and Medicine
IMPERIAL COLLEGE
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
Grant date

Links

GB8806452A 1988-03-18 1988-03-18 Digital data security system Pending GB8806452D0 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8806452A GB8806452D0 (en) 1988-03-18 1988-03-18 Digital data security system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB8806452A GB8806452D0 (en) 1988-03-18 1988-03-18 Digital data security system
JP50362489A JPH03504306A (en) 1988-03-18 1989-03-20
PCT/GB1989/000293 WO1989008915A1 (en) 1988-03-18 1989-03-20 Digital data security system
EP19890904115 EP0406291A1 (en) 1988-03-18 1989-03-20 Digital data security system

Publications (1)

Publication Number Publication Date
GB8806452D0 true GB8806452D0 (en) 1988-04-20

Family

ID=10633665

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8806452A Pending GB8806452D0 (en) 1988-03-18 1988-03-18 Digital data security system

Country Status (4)

Country Link
EP (1) EP0406291A1 (en)
JP (1) JPH03504306A (en)
GB (1) GB8806452D0 (en)
WO (1) WO1989008915A1 (en)

Families Citing this family (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4972471A (en) * 1989-05-15 1990-11-20 Gary Gross Encoding system
FR2658022B1 (en) * 1990-02-07 1995-09-22 Telediffusion Fse Method and system for marking and identification of digitized information.
US6301369B2 (en) 1992-07-31 2001-10-09 Digimarc Corporation Image marking to permit later identification
US5721788A (en) 1992-07-31 1998-02-24 Corbis Corporation Method and system for digital image signatures
US6122403A (en) * 1995-07-27 2000-09-19 Digimarc Corporation Computer system linked by using information in data objects
US6560349B1 (en) 1994-10-21 2003-05-06 Digimarc Corporation Audio monitoring using steganographic information
US6381341B1 (en) * 1996-05-16 2002-04-30 Digimarc Corporation Watermark encoding method exploiting biases inherent in original signal
US6983051B1 (en) 1993-11-18 2006-01-03 Digimarc Corporation Methods for audio watermarking and decoding
US5768426A (en) 1993-11-18 1998-06-16 Digimarc Corporation Graphics processing system employing embedded code signals
US5748763A (en) 1993-11-18 1998-05-05 Digimarc Corporation Image steganography system featuring perceptually adaptive and globally scalable signal embedding
GB9502274D0 (en) 1995-02-06 1995-03-29 Central Research Lab Ltd Method and apparatus for coding information
WO1996027191A1 (en) * 1995-02-28 1996-09-06 Isis Innovation Limited Covert identification
US6229924B1 (en) * 1996-11-12 2001-05-08 Digimarc Corporation Method and apparatus for watermarking video images
US6345145B1 (en) * 1995-08-25 2002-02-05 Sony Corporation Signal recording/reproducing method and apparatus, signal record medium and signal transmission/reception method and apparatus
CA2184949C (en) * 1995-09-28 2000-05-30 Ingemar J. Cox Secure spread spectrum watermarking for multimedia data
EP0788282B1 (en) * 1996-02-05 2010-01-20 Panasonic Corporation Quantization method
US5664018A (en) * 1996-03-12 1997-09-02 Leighton; Frank Thomson Watermarking process resilient to collusion attacks
US5949885A (en) * 1996-03-12 1999-09-07 Leighton; F. Thomson Method for protecting content using watermarking
GB0023099D0 (en) * 1996-07-02 2000-11-01 Yamaha Corp Method and device for storing main information with associated additional information incorporated therein
US6209096B1 (en) 1996-07-02 2001-03-27 Yamaha Corporation Method and device for storing main information with associated additional information incorporated therein
US5848155A (en) * 1996-09-04 1998-12-08 Nec Research Institute, Inc. Spread spectrum watermark for embedded signalling
US6069914A (en) * 1996-09-19 2000-05-30 Nec Research Institute, Inc. Watermarking of image data using MPEG/JPEG coefficients
US5915027A (en) * 1996-11-05 1999-06-22 Nec Research Institute Digital watermarking
GB2319930B (en) * 1996-11-27 2001-05-16 Sony Uk Ltd Storage and transmission of one-bit data
US6118741A (en) * 1997-06-19 2000-09-12 Mimnagh; Winslow M. Method and device for recording information on a carrier
US6108434A (en) * 1997-09-12 2000-08-22 Signafy, Inc. Counteracting geometric distortions for DCT based watermarking
US6611599B2 (en) 1997-09-29 2003-08-26 Hewlett-Packard Development Company, L.P. Watermarking of digital object
CA2331898A1 (en) * 1998-05-12 1999-11-18 Julien J. Nicolas Digital hidden data transport (dhdt)
US6792542B1 (en) 1998-05-12 2004-09-14 Verance Corporation Digital system for embedding a pseudo-randomly modulated auxiliary data sequence in digital samples
US6154571A (en) 1998-06-24 2000-11-28 Nec Research Institute, Inc. Robust digital watermarking
JP3651319B2 (en) 1999-07-16 2005-05-25 日本ビクター株式会社 Electronic watermark information recording method, reproducing method, and an electronic watermark information recording apparatus, reproducing apparatus
JP2001344894A (en) * 2000-05-31 2001-12-14 Sony Corp Data recording medium, data recording method and device, data reproduction method and device
CN1252653C (en) 2000-09-20 2006-04-19 艾普维真股份有限公司 Method for preventing counterfeiting or alteration of printed or engraved surface
LU91698A1 (en) * 2010-06-10 2011-12-12 Pleimo S A System and method for processing digital content

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3263964D1 (en) * 1981-02-16 1985-07-11 British Telecomm Method and apparatus for transmitting data with digitally encoded speech
JPS5885938A (en) * 1981-11-16 1983-05-23 Toshiba Corp Optical information recording system
DE3523809C2 (en) * 1985-05-21 1993-04-29 Polygram Gmbh, 2000 Hamburg, De
JPH0743825B2 (en) * 1985-12-04 1995-05-15 ソニー株式会社 Dubbing method

Also Published As

Publication number Publication date Type
EP0406291A1 (en) 1991-01-09 application
WO1989008915A1 (en) 1989-09-21 application
JPH03504306A (en) 1991-09-19 application

Similar Documents

Publication Publication Date Title
US5091938B1 (en) Digital data cryptographic system
GB2271002B (en) Data processing system
EP0292248A3 (en) Data processing system
JPS6063698A (en) Security system using security robbot
JPS61264371A (en) Data protection system
JPS62293355A (en) Data protection mechanism
JPS6139197A (en) Security system
US4918329B1 (en) Data transmission system
JPS63200244A (en) File access system
JPS62251951A (en) Data processing system
GB2225459B (en) Event recorder
JPS62293333A (en) Data processing system
JPS6086696A (en) Residense security system
GB2227584B (en) Data processing system
JPS62166436A (en) Data processing system
JPS63131300A (en) Security system
JPS633359A (en) Digital information processing system
JPS62261617A (en) Flight-state data confirmation system
JPS63127399A (en) Security information transmitter
EP0331487A3 (en) Data transfer control system
JPS62269534A (en) Information system
GB2196454B (en) Data processing system
JPS6316326A (en) Data integration system
JPS6074099A (en) Security system
JPS63201822A (en) Data processing system