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    4.
    发明专利
    未知

    公开(公告)号：DE68926005T2

    公开(公告)日：1996-10-17

    申请号：DE68926005

    申请日：1989-08-09

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  ABRAHAM DENNIS G ,  JOHNSON DONALD B ,  KARNE RAMESH K ,  LE AN V ,  PRYMAK ROSTISLAW ,  THOMAS JULIAN ,  WILKINS JOHN D ,  YEH PHIL C ,  SMITH RONALD M ,  WHITE STEVE R ,  ARNOLD WILLIAM C

    IPC: G07F7/10 ,  H04L9/00 ,  H04L9/08 ,  H04L9/32

    Abstract: Arrangements are disclosed for validating that key management functions requested for a cryptographic key by the program have been authorised by the originator of the key. The invention includes a cryptographic facility characterised by a secure boundary through which passes an input path for receiving the cryptographic service requests, cryptographic keys and their associated control vectors, and an output path for providing responses thereto. There can be included within the boundary a cryptographic instruction storage coupled to the input path, a control vector checking unit and a cryptographic processing unit coupled to the instruction storage, and a master key storage coupled to the processing means, for providing a secure location for executing key management functions in response to the received service requests. The cryptographic instruction storage receives over the input path a cryptographic service request for performing a key management function on a cryptographic key. The control vector checking unit has an input coupled to the input path for receiving a control vector associated with the cryptographic key and an input connected to the cryptographic instruction storage, for receiving control signals to initiate checking that the control vector authorises the key management function which is requested by the cryptographic service request. The control vector checking unit has an authorisation output connected to an input of the cryptographic processing means, for signalling that the key management function is authorised, the receipt of which by the cryptographic processing unit initiates the performance of the requested key management function with the cryptographic key. The invention enables the flexible control of many cryptographic key management functions in the generation, distribution and use of cryptographic keys, while maintaining a high security standard.

    Detecção de exceção de quantum de ponto flutuante decimal
    6.
    发明专利
    Detecção de exceção de quantum de ponto flutuante decimal 未知

    公开(公告)号：BRPI1102360A2

    公开(公告)日：2015-07-28

    申请号：BRPI1102360

    申请日：2011-05-30

    Applicant: IBM

    Inventor： COWLISHAW MICHAEL F ,  MUELLER SILVIA MELITTA ,  SCHWARZ ERIC ,  YEH PHIL C

    IPC: G06F7/491 ,  G06F7/499

    Abstract: Detecção de exceção de qumitum de ponto flutuante decimal método compreendendo as seguintes etapas: desempenhar as seguintes funções com um processador: aceitar pelo menos um operando com ponto flutuante decimal; executar uma operação de ponto flutuante decimal sobre pelo menos um ponto flutuante decimal operando para produzir um resultado de ponto flutuante decimal; determinar, em resposta à execução, que o resultado de ponto flutuante decimal não consegue manter um quantum preferido, o quantum preferido indicando um valor definido representado por um dígito menos significativo, de um significando do resultado ponto flutuante decimal, e fornecer, em resposta à determinação de que o resultado do ponto flutuante decimal não consegue manter o quantum preferido, uma saida indicando uma exceção quântica, a exceção quántica que ocorre em resposta ao resultado do ponto flutuante decimal não manter o quantum preferido.

    8.
    发明专利
    未知

    公开(公告)号：DE68926005D1

    公开(公告)日：1996-04-25

    申请号：DE68926005

    申请日：1989-08-09

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  ABRAHAM DENNIS G ,  JOHNSON DONALD B ,  KARNE RAMESH K ,  LE AN V ,  PRYMAK ROSTISLAW ,  THOMAS JULIAN ,  WILKINS JOHN D ,  YEH PHIL C ,  SMITH RONALD M ,  WHITE STEVE R ,  ARNOLD WILLIAM C

    IPC: G07F7/10 ,  H04L9/00 ,  H04L9/08 ,  H04L9/32

    Abstract: Arrangements are disclosed for validating that key management functions requested for a cryptographic key by the program have been authorised by the originator of the key. The invention includes a cryptographic facility characterised by a secure boundary through which passes an input path for receiving the cryptographic service requests, cryptographic keys and their associated control vectors, and an output path for providing responses thereto. There can be included within the boundary a cryptographic instruction storage coupled to the input path, a control vector checking unit and a cryptographic processing unit coupled to the instruction storage, and a master key storage coupled to the processing means, for providing a secure location for executing key management functions in response to the received service requests. The cryptographic instruction storage receives over the input path a cryptographic service request for performing a key management function on a cryptographic key. The control vector checking unit has an input coupled to the input path for receiving a control vector associated with the cryptographic key and an input connected to the cryptographic instruction storage, for receiving control signals to initiate checking that the control vector authorises the key management function which is requested by the cryptographic service request. The control vector checking unit has an authorisation output connected to an input of the cryptographic processing means, for signalling that the key management function is authorised, the receipt of which by the cryptographic processing unit initiates the performance of the requested key management function with the cryptographic key. The invention enables the flexible control of many cryptographic key management functions in the generation, distribution and use of cryptographic keys, while maintaining a high security standard.

    SECURE MANAGEMENT OF KEYS USING CONTROL VECTORS
    9.
    发明专利
    SECURE MANAGEMENT OF KEYS USING CONTROL VECTORS 未知

    公开(公告)号：CA1317677C

    公开(公告)日：1993-05-11

    申请号：CA602904

    申请日：1989-06-15

    Applicant: IBM

    Inventor： MATYAS STEPHEN M ,  ABRAHAM DENNIS G ,  JOHNSON DONALD B ,  KARNE RAMESH K ,  LE AN V ,  PRYMAK ROSTISLAW ,  THOMAS JULIAN ,  WILKINS JOHN D ,  YEH PHIL C

    IPC: G09C1/00 ,  G06F9/30 ,  H04L9/00 ,  H04L9/08 ,  H04L9/10 ,  H04L9/32

    Abstract: MA988-011 of the Invention SECURE MANAGEMENT OF KEYS USING CONTROL VECTORS The invention is an apparatus and method for validating that key management functions requested for a cryptographic key by the program have been authorized by the originator of the key. The invention includes a cryptographic facility characterized by a secure boundary through which passes an input path for receiving the cryptographic service requests, cryptographic keys and their associated control vectors, and an output path for providing responses thereto. There can be included within the boundary a cryptographic instruction storage coupled to the input path, a control vector checking unit and a cryptographic processing unit coupled to the instruction storage, and a master key storage coupled to the processing means, for providing a secure location for executing key management functions in response to the received service requests. The cryptographic instruction storage receives over the input path a cryptographic service request for performing a key management function on a cryptographic key. The control vector checking unit has an input coupled to the input path for receiving a control vector associated with the cryptographic key and an input connected to the cryptographic instruction storage, for receiving control signals to initiate checking that the control vector authorizes the key management function which is requested by the cryptographic service request. The control vector checking unit has an authorization output connected to an input of the cryptographic processing means, for signalling that the key management function is authorized, the receipt of which by the cryptographic processing unit initiates the performance of the requested key management function with the cryptographic key. The invention enables the flexible control of many cryptographic key management functions in the generation, distribution and use of cryptographic keys, while maintaining a high security standard.

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