Patents
Sitemap › G09 - Educating; Cryptography; Display; Advertising; Seals › G09C - Ciphering or deciphering apparatus for cryptographic or other purposes involving the need for secrecy › G09C 5 - Ciphering or deciphering apparatus or methods not provided for in other groups of this subclass, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages
Patents for G09C 5 - Ciphering or deciphering apparatus or methods not provided for in other groups of this subclass, e.g. involving the concealment or deformation of graphic data such as designs, written or printed messages (2,737)
12/1999
12/01/1999EP0961479A2 Digital image authentication system
12/01/1999CN1237305A Watermaking information signal
11/1999
11/25/1999WO1999045707A3 Watermark detection
11/25/1999WO1999045706A3 Watermark detection
11/24/1999EP0959621A1 Video copy control with plural embedded signals
11/24/1999EP0959620A1 Video with hidden in-band digital data
11/24/1999CN1236521A Method and apparatus for imprinting ID information into a digital content and for reading out the same
11/18/1999WO1999045705A3 Embedding auxiliary data in a signal
11/18/1999WO1999045704A3 Watermark detection
11/17/1999EP0957637A1 Image attribute altering device and electronic watermark embedding device
11/17/1999EP0648162B1 Copy preventing device and method
11/16/1999CA2169746C Method for key distribution using quantum cryptography
11/11/1999WO1999057885A1 Digital authentication with analog documents
11/10/1999CN1234944A Embedding supplemental data in encoded signal
11/10/1999CN1234521A Anti-counterfeiting method and apparatus using digital screening
11/03/1999CN1233914A Data processing apparatus and method and storage medium
11/02/1999CA2168851C System and method for quantum cryptography
10/1999
10/28/1999WO1999055037A1 Process for transmitting, receiving and/or storing information
10/28/1999CA2329179A1 Process for transmitting, receiving and/or storing information
10/27/1999EP0952728A2 Method and apparatus for watermarking data sets
10/26/1999US5974150 System and method for authentication of goods
10/20/1999EP0951183A2 Electronic watermark processing apparatus
10/07/1999DE19816356A1 Verfahren zum Einbringen manipulationssicherer digitaler Fingerabdrücke in elektronische Dokumente A method for introducing tamper-proof digital fingerprints into electronic documents
10/06/1999EP0948193A2 Method for insertion of digital manipulation-proof fingerprints in electronic documents
10/06/1999EP0946374A1 Tamper-evident form for securely carrying information
09/1999
09/23/1999WO1999048006A1 Method and apparatus for camouflaging data
09/23/1999CA2319601A1 Method and apparatus for camouflaging data
09/15/1999EP0941605A1 Method and arrangement for detecting a watermark
09/15/1999EP0885416B1 Encoding technique for software
09/14/1999US5953170 Label for container
09/10/1999WO1999045707A2 Watermark detection
09/10/1999WO1999045706A2 Watermark detection
09/10/1999WO1999045705A2 Embedding auxiliary data in a signal
09/10/1999WO1999045704A2 Watermark detection
09/08/1999EP0940037A1 Detecting a watermark embedded in an information signal
09/01/1999EP0939552A2 Scrambler, descrambler and recording medium
09/01/1999EP0938807A1 Method and apparatus for imprinting id information into a digital content and for reading out the same
08/1999
08/26/1999WO1999017537A8 Watermarking of digital object
08/19/1999WO1999041900A1 Secure distribution of digital representations
08/18/1999EP0935872A2 Watermarking an information signal
08/18/1999CN1226041A Data processing apparatus and method and storage medium
08/17/1999US5940134 Marking a video and/or audio signal
08/05/1999WO1999039344A1 Method and apparatus for preventing removal of embedded information in cover signals
08/05/1999CA2319737A1 Method and apparatus for preventing removal of embedded information in cover signals
08/04/1999EP0933920A2 Data processing apparatus and method and storage medium
08/04/1999EP0933919A2 Electronic apparatus, data processing method, data processing system, and computer readable storage medium
08/04/1999EP0870272A4 Reader using moving averages to break the (n,k) code barrier for upc, ean, and others
08/03/1999US5933798 Detecting a watermark embedded in an information signal
08/03/1999US5933498 System for controlling access and distribution of digital property
07/1999
07/29/1999WO1999038144A1 Watermark applied to one-dimensional data
07/27/1999US5930377 Method for image encoding
07/27/1999US5930369 Secure spread spectrum watermarking for multimedia data
07/22/1999WO1999037028A1 Vibration wave encoding method and method
07/22/1999DE19900856A1 Anti-Fälschungs-Verfahren und Vorrichtung, welche eine digitale Abschirmung bzw. Überprüfung verwendet Anti-counterfeiting method and apparatus which uses a digital shield or reviewed
07/15/1999WO1999035819A1 Anti-counterfeiting method and apparatus using digital screening
07/15/1999WO1999035647A1 System and method for copy protection for digital signals
07/15/1999CA2434734A1 Method of copy protecting signals
07/15/1999CA2434702A1 Method of copy protecting signals
07/07/1999EP0928110A2 Image signal processing for electronic watermarking
07/06/1999US5920628 Method and apparatus for fingerprinting and authenticating various magnetic media
06/1999
06/29/1999CA2136166C Document copying deterrent method
06/22/1999US5915027 Digital watermarking
06/16/1999EP0923242A2 Copy prevention circuit capable of preventing a copy of image/aural sound signals without change of data structure in digital transmission
06/10/1999WO1999012347A3 Method and arrangement for detecting a watermark
06/09/1999CN1218928A Data control system
06/01/1999US5908495 Colorant; a modified photoreactor; and a liquid vehicle wherein the colorant is rendered light-stable in the mixture
05/1999
05/27/1999WO1999026196A1 Method for identifying an image or a document
05/27/1999WO1999012331A3 Watermarking an information signal
05/27/1999CA2310106A1 Method for identifying an image or a document
05/20/1999WO1999024267A1 Tamper-evident form for securely carrying information
05/18/1999US5905801 File transfer using facsimile modem
05/12/1999EP0915620A1 Method and apparatus for preventing unauthorized copy of data recorded on recording medium
05/06/1999WO1999022480A1 Watermarking of digital image data
05/06/1999CA2308402A1 Watermarking of digital image data
05/04/1999US5900954 Machine readable record carrier with hologram
04/1999
04/08/1999WO1999017537A1 Watermarking of digital object
04/08/1999WO1999017536A1 Method for generating and verifying degital watermarks and for exchanging data containing digital watermarks
04/08/1999WO1999017486A1 System and method for authentication of goods
04/08/1999CA2304632A1 System and method for authentication of goods
04/08/1999CA2304611A1 Method for generating and verifying digital watermarks and for exchanging data containing digital watermarks
04/06/1999US5893067 Method and apparatus for echo data hiding in audio signals
03/1999
03/31/1999EP0905967A1 Method for generating digital watermarks and for exchanging data containing digital watermarks
03/30/1999US5889270 Bar code decoding using moving averages to break the (N.K.) code barrier for UPC, EAN, code 128 and others
03/24/1999EP0903943A2 Method and apparatus for superposing a digital watermark and method and apparatus for detecting a digital watermark
03/24/1999EP0903942A2 Apparatus for superimposing a digital watermark in a video signal and apparatus for detecting the same
03/23/1999US5887064 Cryptographic equipment
03/17/1999EP0902591A2 Method for counteracting geometric distortions for DCT based watermarking
03/11/1999WO1999012347A2 Method and arrangement for detecting a watermark
03/11/1999WO1999012331A2 Watermarking an information signal
03/11/1999CA2271042A1 Watermarking an information signal
03/10/1999EP0900500A2 Embedding supplemental data in an encoded signal
03/09/1999US5880453 Reader system for removable two dimensional code
03/04/1999WO1999010837A1 Method and apparatus for watermarking video images
03/04/1999CA2301218A1 Method and apparatus for watermarking video images
02/1999
02/24/1999CN1209019A MPEG2 moving picte encoding.decodind system
02/23/1999US5875249 Invisible image watermark for image verification
02/10/1999CN1207818A Digital anti-counterfeiting software method and apparatus
02/09/1999US5870477 Enciphering/deciphering device and method, and encryption/decryption communication system
02/09/1999US5870469 Method for testing the intactness of stored data in a processing facility for sheet material such as bank notes or papers of value
02/02/1999US5865471 For use with photo-sensing apparatus
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