Global Patent Index - EP 1125189 A4

EP 1125189 A4 20011128 - METHODS OF DIGITAL STEGANOGRAPHY FOR MULTIMEDIA DATA

Title (en)

METHODS OF DIGITAL STEGANOGRAPHY FOR MULTIMEDIA DATA

Title (de)

VERFAHREN VON DIGITALER STEGANOGRAFIE FÜR MULTIMEDIADATEN

Title (fr)

PROCEDES DE STEGANOGRAPHIE NUMERIQUE DESTINES A DES DONNEES MULTIMEDIA

Publication

EP 1125189 A4 20011128 (EN)

Application

EP 99952884 A 19991026

Priority

  • SG 9900105 W 19991026
  • SG 9803458 A 19981028

Abstract (en)

[origin: WO0025203A1] A lossless steganographic encoding method for secure transmission or storage of multimedia data. Primary data, such as text, image, video, audio or other digital data, is utilised in a steganographic process to encode secondary data, such as text, image, video, audio or other digital data. The primary data includes a plurality of first data elements and the secondary data includes a plurality of second data elements. For each second data element an operation is performed with a first data element so as to generate a key element as a result of the operation. The key elements may then be securely transmitted and/or stored. In preferred embodiments of the method, the primary data may be rearranged according to a predefined or random manner, or it may be resized so as to match the size of the secondary data. A complementary decoding method is disclosed, and a method of generating a pseudo-random number sequence, which may be used in the steganographic and decoding methods, is also disclosed.

IPC 1-7

G06F 7/58; H04L 9/20

IPC 8 full level

G06T 1/00 (2006.01); G06F 7/58 (2006.01); G09C 1/00 (2006.01); G09C 5/00 (2006.01); H04L 9/22 (2006.01); H04N 1/387 (2006.01); H04N 7/26 (2006.01)

CPC (source: EP)

G06F 7/582 (2013.01); H04L 9/0662 (2013.01); H04L 2209/20 (2013.01); H04L 2209/608 (2013.01)

Citation (search report)

  • [X] US 5717760 A 19980210 - SATTERFIELD RICHARD C [US]
  • [X] EP 0035048 A1 19810909 - IBM [US]
  • [A] JOHNSON N F ET AL: "EXPLORING STEGANOGRAPHY: SEEING THE UNSEEN", COMPUTER, IEEE COMPUTER SOCIETY, LONG BEACH., CA, US, US, vol. 31, no. 2, 1 February 1998 (1998-02-01), pages 26 - 34, XP000737935, ISSN: 0018-9162
  • See references of WO 0025203A1

Designated contracting state (EPC)

AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

DOCDB simple family (publication)

WO 0025203 A1 20000504; AU 6494399 A 20000515; EP 1125189 A1 20010822; EP 1125189 A4 20011128; JP 2002528770 A 20020903

DOCDB simple family (application)

SG 9900105 W 19991026; AU 6494399 A 19991026; EP 99952884 A 19991026; JP 2000578722 A 19991026