公开(公告)号：EP1636715A4

公开(公告)日：2009-03-25

申请号：EP03817468

申请日：2003-12-15

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: G06F17/00 ,  G06F21/00

CPC classification number: G06F21/123

Abstract: A processing unit (300) includes a read-only encryption key (394). Loader code image (250) is loaded into system memory (205) from non-volatile storage (270). Loader code image (250) includes a prefix value (225) and a suffix value (235). The prefix value (225) is combined with the master key (394) from the processing unit (300) to create a random value that is the seed for a hashing algorithm. The hashing algorithm uses the seed value with a signature formed from the blocks of code to form a result. During the hashing algorithm, intermediate key values are generated and stored in a memory area inaccessible by the user. The intermediate key values are used by the loader code after the loader has been authenticated and loaded. The loader combines one or more of the intermediate key values with prefix and suffix values that correspond to other software modules to authenticate the software, using a hashing algorithm, and load the software upon authentication.

公开(公告)号：JPH11145849A

公开(公告)日：1999-05-28

申请号：JP22959298

申请日：1998-08-14

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: G06F5/00 ,  G06T9/00 ,  H03M7/30 ,  H03M7/40 ,  H03M7/46

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device improved for compressing data. SOLUTION: A method is disclosed for encoding the input data stream of a primary symbol and generating the output sequence of a pointer. A literal string in the input data stream is first loaded into a history buffer. The value of a history buffer pointer is copied to a register, and the starting position of the literal string in the history buffer is shown. A counter is incremented, corresponding to each following literal symbol from the input data stream. Next, the literal string and each following literal symbol from the input data stream are encoded by using values in the register and the counter as literal pointers. Finally, the literal pointer is outputted from a data compressor.

公开(公告)号：WO2005006109A3

公开(公告)日：2005-03-03

申请号：PCT/US0339809

申请日：2003-12-15

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: G06F21/00 ,  G06F17/00

CPC classification number: G06F21/123

Abstract: A processing unit (300) includes a read-only encryption key (394). Loader code image (250) is loaded into system memory (205) from non-volatile storage (270). Loader code image (250) includes a prefix value (225) and a suffix value (235). The prefix value (225) is combined with the master key (394) from the processing unit (300) to create a random value that is the seed for a hashing algorithm. The hashing algorithm uses the seed value with a signature formed from the blocks of code to form a result. During the hashing algorithm, intermediate key values are generated and stored in a memory area inaccessible by the user. The intermediate key values are used by the loader code after the loader has been authenticated and loaded. The loader combines one or more of the intermediate key values with prefix and suffix values that correspond to other software modules to authenticate the software, using a hashing algorithm, and load the software upon authentication.

Abstract translation: 处理单元（300）包括只读加密密钥（394）。 装载器代码图像（250）从非易失性存储器（270）装载到系统存储器（205）中。 装载器代码图像（250）包括前缀值（225）和后缀值（235）。 前缀值（225）与来自处理单元（300）的主密钥（394）组合，以创建作为散列算法的种子的随机值。 散列算法使用具有由代码块形成的签名的种子值来形成结果。 在散列算法期间，生成中间密钥值并存储在用户无法访问的存储区域中。 中间密钥值由加载程序代码在加载程序进行身份验证和加载后使用。 加载器将一个或多个中间密钥值与对应于其他软件模块的前缀和后缀值组合以使用散列算法进行认证，并在认证时加载软件。

公开(公告)号：JP2004104797A

公开(公告)日：2004-04-02

申请号：JP2003316027

申请日：2003-09-08

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： CRAFT DAVID J ,  JOHNS CHARLES R

IPC: G06F3/00 ,  G06F13/40 ,  H03M5/14 ,  H03M7/20 ,  H04L25/02 ,  H04L25/493

CPC classification number: G06F13/4072

Abstract: PROBLEM TO BE SOLVED: To provide a method and system for differential transmission of data on a bus overcoming the limitations of conventional systems.
SOLUTION: This differential transitional coding uses a differential bus. Use of differential transition includes a step to divide a differential bus into one or more groups each of which is composed of four bus lines. Use of a differential bus includes a step to assert half of the bus lines in one group during bus data transmission and thereby regulate the asserted and reversely asserted sets of the bus lines. In addition, at least one of the bus lines in the asserted set is reversely asserted and at least one of the bus lines in the reversely asserted set is asserted. Consequently, data are differentially transmitted by driving two bus lines, i.e., one line for one set.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JPH10320224A

公开(公告)日：1998-12-04

申请号：JP9787298

申请日：1998-04-09

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: G06F11/18 ,  G11B20/00 ,  G11B20/18 ,  H03M7/30

Abstract: PROBLEM TO BE SOLVED: To provide a system capable of giving high maintainability at the time of compressing data. SOLUTION: The system includes interfaces 102, 112, compression/ decompression units 104, 114 and a storage means 120. Each compression/ decompression units compresses/decompresses data sent through its corresponding interface and supplies a data stream. The compression/decompression units 104, 114 mutually monitor respective data streams through an interface 116. When one compression/decompression unit is a master device, the other compression/decompression units compares one data stream with the other.

公开(公告)号：WO2005006109A8

公开(公告)日：2005-09-29

申请号：PCT/US0339809

申请日：2003-12-15

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: G06F21/00 ,  G06F17/00

CPC classification number: G06F21/123

Abstract: A processing unit (300) includes a read-only encryption key (394). Loader code image (250) is loaded into system memory (205) from non-volatile storage (270). Loader code image (250) includes a prefix value (225) and a suffix value (235). The prefix value (225) is combined with the master key (394) from the processing unit (300) to create a random value that is the seed for a hashing algorithm. The hashing algorithm uses the seed value with a signature formed from the blocks of code to form a result. During the hashing algorithm, intermediate key values are generated and stored in a memory area inaccessible by the user. The intermediate key values are used by the loader code after the loader has been authenticated and loaded. The loader combines one or more of the intermediate key values with prefix and suffix values that correspond to other software modules to authenticate the software, using a hashing algorithm, and load the software upon authentication.

Abstract translation: 处理单元（300）包括只读加密密钥（394）。 从非易失性存储器（270）将加载器代码映像（250）加载到系统存储器（205）中。 装载者代码图像（250）包括前缀值（225）和后缀值（235）。 前缀值（225）与来自处理单元（300）的主密钥（394）组合以创建作为散列算法的种子的随机值。 散列算法使用种子值与由代码块形成的签名形成结果。 在散列算法期间，中间键值被生成并存储在用户不可访问的存储区域中。 加载程序经过身份验证和加载后，加载程序代码使用中间键值。 加载器将一个或多个中间密钥值与前缀和后缀值组合起来，后者值对应于其他软件模块，以使用散列算法对软件进行身份验证，并在验证后加载软件。

公开(公告)号：JP2004102286A

公开(公告)日：2004-04-02

申请号：JP2003316023

申请日：2003-09-08

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： CRAFT DAVID J ,  JOHNS CHARLES R

IPC: G06F13/38 ,  G09C1/00 ,  H03K3/84 ,  H04L9/18 ,  H04L9/20

CPC classification number: H04L9/0662 ,  H04L2209/125 ,  H04L2209/34

Abstract: PROBLEM TO BE SOLVED: To provide a method and a device for enciphering data that are transmitted through a differential transition data bus by overcoming the limits of the conventional system.
SOLUTION: A data enciphering method is provided for a differential bus using transition coding. In a prescribed bus transfer cycle, input data are mapped, coded and enciphered as a logic state. The mapping, coding and enciphering of the input data are changed for every bus transfer cycle, and are a function of pseudo-random numbers. The logic state is differentially transmitted from a bus transmitter to a bus receiver, mapped as corresponding output data, deciphered and decoded.
COPYRIGHT: (C)2004,JPO

公开(公告)号：JPH11196000A

公开(公告)日：1999-07-21

申请号：JP22879098

申请日：1998-08-13

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: H03M7/40 ,  G06T9/00 ,  H03M7/30 ,  H03M7/46

Abstract: PROBLEM TO BE SOLVED: To provide an improved method and system for compressing data. SOLUTION: An input data stream of a primitive symbol is coded and a method for generating an output sequence of a pointer is disclosed. The initial part of the input data stream is coded as a literal pointer by a compressor. The literal pointer includes at least 1 data byte from the data stream. The succeeding parts of the input data stream are coded as a copy pointer. The copy pointer includes an offset denoting a history buffer in a count and compressor. All succeeding data bytes from the input data stream are alternately coded as the literal pointer and the copy pointer. Thus, a coding output sequence outputted from the compressor includes strings of the pointer where the literal pointer and the copy pointer.

公开(公告)号：CA2525376C

公开(公告)日：2014-02-04

申请号：CA2525376

申请日：2003-12-15

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: G06F17/00 ,  G06F21/00

Abstract: A processing unit (300) includes a read-only encryption key (394). Loader code image (250) is loaded into system memory (205) from non-volatile storage (270). Loader code image (250) includes a prefix value (225) and a suffix value (235). The prefix value (225) is combined with the master key (394) from the processing unit (300) to create a random value that is the seed for a hashing algorithm. The hashing algorithm uses the seed value with a signature formed from the blocks of code to form a result. During the hashing algorithm, intermediate key values are generated and stored in a memory area inaccessible by the user. The intermediate key values are used by the loader code after the loader has been authenticated and loaded. The loader combines one or more of the intermediate key values with prefix and suffix values that correspond to other software modules to authenticate the software, using a hashing algorithm, and load the software upon authentication.

公开(公告)号：DE69834695D1

公开(公告)日：2006-07-06

申请号：DE69834695

申请日：1998-09-14

Applicant: IBM

Inventor： CRAFT DAVID J

IPC: H03M7/30 ,  H03M7/40 ,  G06T9/00 ,  H03M7/46

Abstract: A method for encoding an input data stream of source symbols to produce an output sequence of pointers is disclosed. An initial part of the input data stream is encoded as a LITERAL_POINTER by a compressor. A LITERAL_POINTER includes at least one data byte from the data stream. A subsequent part of the input data stream is encoded as a COPY_POINTER. The COPY_POINTER includes a count and a displacement pointing to a history-buffer within the compressor. All succeeding data bytes from the input data stream are encoded as LITERAL_POINTERs and COPY_POINTERs in an alternating fashion, such that an encoded output sequence output by the compressor includes a string of pointers alternating between LITERAL_POINTERs and COPY_POINTERs.