EP 0985313 A1 20000315 - METHOD FOR HIDING BINARY DATA IN A DIGITAL IMAGE
Title (en)
METHOD FOR HIDING BINARY DATA IN A DIGITAL IMAGE
Title (de)
VERFAHREN ZUM VERSTECKEN VON BINÄREN DATEN IN EINEM DIGITALEN BILD
Title (fr)
PROCEDE DE DISSIMULATION D'INFORMATIONS BINAIRES DANS UNE IMAGE NUMERIQUE
Publication
Application
Priority
- FR 9900485 W 19990304
- FR 9804083 A 19980305
Abstract (en)
[origin: FR2775812A1] The invention concerns a method for hiding a primary digital information (Iinf1) in an initial digital document, in particular an initial multimedia document (Iorig), characterised in that it consists in: first breaking down the initial document (Iorig), by determining a reference digital document (Iref) a function of the initial digital document (Iorig) in particular by a fractal method, and a secondary digital information (Iinf2) a function of the primary digital information to be hidden, such that the sum of the reference digital document (Iref) and said secondary digital information (Iinf2) is a substantially modified document (I'orig) equal to the initial digital document (Iorig); inserting the secondary digital information (Iinf2) thus determined in said initial document, by computing a modified image (I'orig) constituted by the sum of said reference digital document (Iref) and said secondary digital information (Iinf2)so as to obtain a modified digital document (I'orig) close to the initial document (Iorig) but integrating substantially indiscernible the primary digital information (Iinf1) to be hidden. Said method enables to retrieve digital information hidden in a multimedia document in a dual manner. Said method, based on the concept of auto-similarity, and ensures, under certain conditions, that the input information is not visible, prevents image manipulations, and can finally be retrieved without providing knowledge of the original documents.
IPC 1-7
IPC 8 full level
CPC (source: EP US)
G06T 1/0028 (2013.01 - EP US); H04N 1/32203 (2013.01 - EP US); H04N 1/32208 (2013.01 - EP US); H04N 1/32267 (2013.01 - EP US); H04N 2201/3233 (2013.01 - EP US); H04N 2201/327 (2013.01 - EP US)
Citation (search report)
See references of WO 9945696A1
Designated contracting state (EPC)
DE ES FR GB GR IE IT
DOCDB simple family (publication)
FR 2775812 A1 19990903; EP 0985313 A1 20000315; US 6643383 B1 20031104; WO 9945696 A1 19990910
DOCDB simple family (application)
FR 9804083 A 19980305; EP 99938027 A 19990304; FR 9900485 W 19990304; US 42326699 A 19991105