公开(公告)号：JP2000124894A

公开(公告)日：2000-04-28

申请号：JP25678899

申请日：1999-09-10

Applicant: IBM

Inventor： CIACELLI MARK LOUIS ,  URDA JOHN WILLIAM ,  LAM WAI MAN ,  KOULOHERIS JACK LAWRENCE ,  FETKOVICH JOHN EDWARD

IPC: G06F12/14 ,  G06F1/00 ,  G06F21/00 ,  G09C1/00 ,  G11B20/00 ,  H04L9/14 ,  H04L9/18 ,  H04N5/91 ,  H04N7/26 ,  H04N21/4408 ,  H04N7/167 ,  H04N7/24

Abstract: PROBLEM TO BE SOLVED: To enable data of a non-ciphered format to be communicated to an internal structure from a CPU, without revealing them by blocking revelation at transferring of raw data stream. SOLUTION: Prior to enciphering, an enciphering module 22 of a CPU 11 transmits a signal to a decoding module 23 or a decoder 27 and allows a specific algorithm the enciphering module 22 uses be known. The decoding module 23 and the decoder 27 use a decoding algorithm corresponding to a selected enciphering/decoding algorithm pair. The decoding module 23 or the decoder 27 uses a resident decoding algorithm and decodes the downloaded decoding algorithm. The enciphering module 22 uses an actual enciphering algorithm, enciphers data, and the decoding module 23 or the decoder 27 decodes the data by using a downloaded algorithm routine. A reception data processing module 24 or a device 28 executes demand data processing, such as an MPEG decoding of a live compression video/sound data signal.

公开(公告)号：JP2001346205A

公开(公告)日：2001-12-14

申请号：JP2001084465

申请日：2001-03-23

Applicant: IBM

Inventor： ERIC M FOSTER ,  FRANKLIN DENNIS E ,  LAM WAI MAN ,  LOSINGER RAYMOND E ,  NGAI CHUCK H

IPC: G06F11/10 ,  G11B20/10 ,  G11B20/18 ,  H03M13/37 ,  H04L1/00 ,  H04N19/00 ,  H04N19/89 ,  H04N21/43 ,  H04N21/44 ,  H04N21/4425 ,  H04N7/24

Abstract: PROBLEM TO BE SOLVED: To provide enhanced error recovery in the process of storing digitally transmitted audio and video signals. SOLUTION: Data damaged or lost when being sent via an irreversible compression digital transmission link are replaced with data given in relation to storage to and read from a mass storage device and/or deleted. A different procedure is used to conceal an artifact corresponding to error data based on a size of valid data and an error preceding and succeeding to an error in a data stream.

公开(公告)号：JPH1188859A

公开(公告)日：1999-03-30

申请号：JP15509298

申请日：1998-06-04

Applicant: IBM

Inventor： CIACELLI MARK LOUIS ,  URDA JOHN WILLIAM ,  LAM WAI MAN ,  KOULOHERIS JACK LAWRENCE ,  FETKOVICH JOHN EDWARD

IPC: G06F12/14 ,  G06F1/00 ,  G06F21/00 ,  G09C1/00 ,  G11B20/00 ,  H04L9/14 ,  H04L9/18 ,  H04N5/91 ,  H04N7/26 ,  H04N21/4408 ,  H04N7/167

Abstract: PROBLEM TO BE SOLVED: To improve conventional DVD processing for an enciphered code data stream. SOLUTION: A device, a method and a computer program product for digitally processing an enciphered data stream based on CSS technology e.g. are provided. The digital processing insures the communication of row data in a computer system from a central processing unit(CPU) 11 to an optional accessable structure such as a memory 25 and a system bus 26. The decoding of a CSS enciphered data stream is generated in a module to be executed by the CPU 11, and prior to the transfer of data from the CPU 11, the enciphering of the data is executed. Since the data are processed by the method, software for the CSS enciphered data stream can be decoded and the insurance of data having copyright can be held. Various technical procedures for establishing an enciphering/decoding algorithm pair to be used are described.

公开(公告)号：HK1042756A1

公开(公告)日：2002-08-23

申请号：HK02103947

申请日：2002-05-28

Applicant: IBM

Inventor： CIACELLI MARK LOUIS ,  URDA JOHN WILLIAM ,  LAM WAI MAN ,  KOULOHERIS JACK LAWRENCE ,  FETKOVICH JOHN EDWARD

IPC: G06F12/14 ,  G06F1/00 ,  G06F21/00 ,  G09C1/00 ,  G11B20/00 ,  H04L9/14 ,  H04L9/18 ,  H04N5/91 ,  H04N7/26 ,  H04N21/4408 ,  G06F

Abstract: Apparatus, method and computer program product are provided for digitally processing an encrypted data stream scrambled, for example, according to content scrambling system (CSS) technology. This digital processing insures against communication of clear data within the computer system from a central processing unit (CPU) to any accessible structure, such as memory or a system bus. Descrambling of the (CSS) scrambled data stream occurs within a module executing on the CPU, which is followed by re-encryption of the data prior to transfer from the CPU. By so processing the data, integrity of copyrighted material is maintained, while allowing for software descrambling of the CSS encrypted data stream. Various techniques for establishing the encryption/decryption algorithm pair employed are described. Decryption of the re-encrypted data can occur at a receiving software module and/or a receiving hardware device, such as a decoder.

公开(公告)号：SG77641A1

公开(公告)日：2001-01-16

申请号：SG1998001473

申请日：1998-06-19

Applicant: IBM

Inventor： CIACELLI MARK LOUIS ,  URDA JOHN WILLIAM ,  LAM WAI MAN ,  KOULOHERIS JACK LAWRENCE ,  FETKOVICH JOHN EDWARD

IPC: G06F12/14 ,  G06F1/00 ,  G06F21/00 ,  G09C1/00 ,  G11B20/00 ,  H04L9/14 ,  H04L9/18 ,  H04N5/91 ,  H04N7/26 ,  H04N21/4408 ,  H04N7/16

Abstract: Apparatus, method and computer program product are provided for digitally processing an encrypted data stream scrambled, for example, according to content scrambling system (CSS) technology. This digital processing insures against communication of clear data within the computer system from a central processing unit (CPU) to any accessible structure, such as memory or a system bus. Descrambling of the (CSS) scrambled data stream occurs within a module executing on the CPU, which is followed by re-encryption of the data prior to transfer from the CPU. By so processing the data, integrity of copyrighted material is maintained, while allowing for software descrambling of the CSS encrypted data stream. Various techniques for establishing the encryption/decryption algorithm pair employed are described. Decryption of the re-encrypted data can occur at a receiving software module and/or a receiving hardware device, such as a decoder.