公开(公告)号：CA2220816C

公开(公告)日：2003-10-28

申请号：CA2220816

申请日：1997-11-12

Applicant: IBM

Inventor： NINOMIYA SYOITI ,  MORIMOTO NORISHIGE ,  TEZUKA SHU

IPC: G06F12/14 ,  G06F21/24 ,  G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04K1/02 ,  H04N5/913

Abstract: To hide message information into media information in frequency space. With this, it is the objective of the present invention to provide a data hiding method which has high resistance to removal or change of message information embedded into media information and which continues to effectively maintain hidden message information even when signa l processing is performed by employing a frequency filter. In order to hide message informat ion (m) into media information (M), the frequency transform of the message information (m ) and the media information (M) are performed, and frequency spectra f1 and f2 are obt ained. Next, from the frequency spectrum f2 of the message information (m), a region cont aining feature frequency components representative of the features of the message informati on (m) in real space is extracted as the base region B. Then, n copies of the base region B are generated, and in frequency space, the n copies are dispersedly arranged. Also, by maki ng the frequency components other than that equal to zero, a frequency spectrum f3 is generat ed as intermediate information. Finally, the frequency spectrum f3 and the frequen cy spectrum f, are added, and by performing the inverse frequency transform of the result, the message information (m) can be hidden into the media information (M).

公开(公告)号：ES2248830T3

公开(公告)日：2006-03-16

申请号：ES97309191

申请日：1997-11-14

Applicant: IBM

Inventor： NINOMIYA SYOITI ,  TEZUKA SHU ,  MORIMOTO NORISHIGE

IPC: G06F12/14 ,  G06F21/24 ,  G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  G06T11/00

Abstract: CON EL FIN DE OCULTAR INFORMACION DE MENSAJES (M) EN INFORMACION DE MEDIOS (M), SE REALIZA LA TRANSFORMACION DE LA FRECUENCIA DE LA INFORMACION DE MENSAJES (M) Y LA INFORMACION DE MEDIOS (M), Y SE OBTIENEN ESPECTROS DE FRECUENCIA F SUB,1} Y F SUB,2}. A CONTINUACION, SE EXTRAE DEL ESPECTRO DE FRECUENCIA F SUB,2} DE LA INFORMACION DE MENSAJES (M) COMO LA REGION BASE B, UNA REGION QUE CONTIENE COMPONENTES DE FRECUENCIA CARACTERISTICOS QUE REPRESENTAN LAS CARACTERISTICAS DE LA INFORMACION DE MENSAJES (M) EN EL ESPACIO REAL. DESPUES, SE GENERAN N COPIAS DE LA REGION BASE B, Y EN EL ESPACIO DE LA FRECUENCIA, LAS N COPIAS SON DISPUESTAS DE FORMA DISPERSA. TAMBIEN, HACIENDO QUE LOS COMPONENTES DE FRECUENCIAS SEAN OTROS QUE IGUAL A CERO, SE GENERA UN ESPECTRO DE FRECUENCIA F SUB,3} COMO INFORMACION INTERMEDIA. FINALMENTE, SE AÑADEN EL ESPECTRO DE FRECUENCIA F SUB,3} Y EL ESPECTRO DE FRECUENCIA F SUB,1}, Y MEDIANTE LA REALIZACION DE LA TRANSFORMACION DE FRECUENCIA INVERSA DEL RESULTADO, LA INFORMACION DE MENSAJES (M) PUEDE SER OCULTADA EN LA INFORMACION DE MEDIOS (M).

公开(公告)号：DE69733989D1

公开(公告)日：2005-09-22

申请号：DE69733989

申请日：1997-11-14

Applicant: IBM

Inventor： NINOMIYA SYOITI ,  TEZUKA SHU ,  MORIMOTO NORISHIGE

IPC: G06F12/14 ,  G06F21/24 ,  G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  G06T11/00

Abstract: In order to hide message information (m) in media information (M), the frequency transform of the message information (m) and the media information (M) are performed, and frequency spectra f1 and f2 are obtained. Next, from the frequency spectrum f2 of the message information (m), a region containing feature frequency components representative of the features of the message information (m) in real space is extracted as the base region B. Then, n copies of the base region B are generated, and in frequency space, the n copies are dispersedly arranged. Also, by making the frequency components other than that equal to zero, a frequency spectrum f3 is generated as intermediate information. Finally, the frequency spectrum f3 and the frequency spectrum f1 are added, and by performing the inverse frequency transform of the result, the message information (m) can be hidden in the media information (M).

公开(公告)号：CA2220816A1

公开(公告)日：1998-05-27

申请号：CA2220816

申请日：1997-11-12

Applicant: IBM

Inventor： TEZUKA SHU ,  NINOMIYA SYOITI ,  MORIMOTO NORISHIGE

IPC: G06F12/14 ,  G06F21/24 ,  G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  H04K1/02 ,  H04N5/913

Abstract: To hide message information into media information in frequency space. With this , it is the objective of the present invention to provide a data hiding method which has hig h resistance to removal or change of message information embedded into media information and which continues to effectively maintain hidden message information even when signal pr ocessing is performed by employing a frequency filter. In order to hide message information (m) into media information (M), the frequency transform of the message information (m) an d the media information (M) are performed, and frequency spectra f1 and f2 are obtaine d. Next, from the frequency spectrum f2 of the message information (m), a region containi ng feature frequency components representative of the features of the message information ( m) in real space is extracted as the base region B. Then, n copies of the base region B are generated, and in frequency space, the n copies are dispersedly arranged. Also, by making t he frequency components other than that equal to zero, a frequency spectrum f3 is generated a s intermediate information. Finally, the frequency spectrum f3 and the frequency s pectrum f, are added, and by performing the inverse frequency transform of the result, the message information (m) can be hidden into the media information (M).

公开(公告)号：DE3580151D1

公开(公告)日：1990-11-22

申请号：DE3580151

申请日：1985-08-23

Applicant: IBM

Inventor： TEZUKA SHU

IPC: H03K3/84 ,  G06F7/58

Abstract: The pseudorandom number generator consists of a M-sequence generator (1) whose output is fed in parallel to a hardware shuffling device (4). The M-sequence generator represents a polynomial circuit including a shift register (2); the shuffling device is a matrix multiplication circuit (4) with a characteristic matrix G which generates the random numbers with the desired statistical properties.

公开(公告)号：MY123085A

公开(公告)日：2006-05-31

申请号：MYPI9705022

申请日：1997-10-24

Applicant: IBM

Inventor： MORIMOTO NORISHIGE ,  TEZUKA SHU ,  NINOMIYA SYOITI

IPC: G06F12/14 ,  H04L9/32 ,  G06F21/24 ,  G06K9/36 ,  G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081

Abstract: A METHOD FOR HIDING MESSAGE INFORMATION INTO MEDIA INFORMATION IN FREQUENCY SPACE. THE DATA HIDING METHOD HAS HIGH RESISTANCE TO REMOVAL OR CHANGE OF MESSAGE INFORMATION EMBEDDED INTO MEDIA INFORMATION AND EFFECTIVELY MAINTAIN HIDDEN MESSAGE INFORMATION EVEN WHEN SIGNAL PROCESSING IS PERFORMED BY EMPLOYING A FREQUENCY FILTER. MORE SPECIFICALLY, IN ORDER TO HIDE MESSAGE INFORMATION (M) INTO MEDIA INFORMATION (M), THE FREQUENCY TRANSFORM OF THE MESSAGE INFORMATION (M) AND THE MEDIA INFORMATION (M) ARE PERFORMED, AND FREQUENCY SPECTRA FL AND F2 ARE OBTAINED. NEXT, FROM THE FREQUENCY SPECTRUM F2 OF THE MESSAGE INFORMATION (M), A REGION CONTAINING FEATURE FREQUENCY COMPONENTS REPRESENTATIVE OF THE FEATURES OF THE MESSAGE INFORMATION (M) IN REAL SPACE IS EXTRACTED AS THE BASE REGION B. THEN, N COPIES OF THE BASE REGION B ARE GENERATED, AND IN FREQUENCY SPACE, THE N COPIES ARE DISPERSEDLY ARRANGED.

公开(公告)号：DE69733989T2

公开(公告)日：2006-05-24

申请号：DE69733989

申请日：1997-11-14

Applicant: IBM

Inventor： NINOMIYA SYOITI ,  TEZUKA SHU ,  MORIMOTO NORISHIGE

IPC: G06F12/14 ,  G06T11/00 ,  G06F21/24 ,  G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081

Abstract: In order to hide message information (m) in media information (M), the frequency transform of the message information (m) and the media information (M) are performed, and frequency spectra f1 and f2 are obtained. Next, from the frequency spectrum f2 of the message information (m), a region containing feature frequency components representative of the features of the message information (m) in real space is extracted as the base region B. Then, n copies of the base region B are generated, and in frequency space, the n copies are dispersedly arranged. Also, by making the frequency components other than that equal to zero, a frequency spectrum f3 is generated as intermediate information. Finally, the frequency spectrum f3 and the frequency spectrum f1 are added, and by performing the inverse frequency transform of the result, the message information (m) can be hidden in the media information (M).

公开(公告)号：HK1015904A1

公开(公告)日：1999-10-22

申请号：HK99100759

申请日：1999-02-24

Applicant: IBM

Inventor： MORIMOTO NORISHIGE ,  TEZUKA SHU ,  NIMOMIYA SYOITI

IPC: G06F12/14 ,  G06F21/24 ,  G06T1/00 ,  G09C5/00 ,  H04N1/32 ,  H04N1/387 ,  H04N7/08 ,  H04N7/081 ,  G06F

Abstract: In order to hide message information (m) in media information (M), the frequency transform of the message information (m) and the media information (M) are performed, and frequency spectra f1 and f2 are obtained. Next, from the frequency spectrum f2 of the message information (m), a region containing feature frequency components representative of the features of the message information (m) in real space is extracted as the base region B. Then, n copies of the base region B are generated, and in frequency space, the n copies are dispersedly arranged. Also, by making the frequency components other than that equal to zero, a frequency spectrum f3 is generated as intermediate information. Finally, the frequency spectrum f3 and the frequency spectrum f1 are added, and by performing the inverse frequency transform of the result, the message information (m) can be hidden in the media information (M).