公开(公告)号：JPS61177566A

公开(公告)日：1986-08-09

申请号：JP28322185

申请日：1985-12-18

Applicant: IBM

Inventor： GDANIEC JOSEPH MARTIN ,  SAHULKA RICHARD JOHN ,  SOLL DAVID BENJAMIN

IPC: G06F15/16 ,  G06F9/44 ,  G06F9/45

公开(公告)号：DE2861447D1

公开(公告)日：1982-02-11

申请号：DE2861447

申请日：1978-12-05

Applicant: IBM

Inventor： EHRSAM WILLIAM FRIEDRICH ,  ELANDER ROBERT CARL ,  MATYAS STEPHEN MICHAEL ,  MEYER CARL HEINZ-WILHELM ,  SAHULKA RICHARD JOHN ,  TUCHMAN WALTER LEONARD

IPC: G06F3/06 ,  G06F1/00 ,  G06F12/00 ,  G06F21/00 ,  G07F7/10 ,  H04L9/14 ,  H04L9/18 ,  H04L9/02 ,  G06F13/00

Abstract: This invention concerns a method and apparatus for cryptographic data file security in multiple domain data processing systems. An embodiment of the invention provides a file security system for data files created at a first host system (j) in one domain and recovered at a second host system (k or l) in another domain of a multiple domain network. Each of the host systems contain a data security device (11) provided with multiple host master keys and capable of performing a variety of cryptographic operations. Creation and recovery of a secure data file is accomplished without revealing the master keys of either of the host systems to the other of the host systems. When the data file is to be created at the first host system, the first host system data security device provides a file recovery key for subsequent recovery of the data file at the second host system and enciphers first host system plaintext under a primary file key, which is related to the file recovery key, to obtain first host system ciphertext as the data file. The file recovery key is used as header information for the data file or maintained separately as a private file recovery key. When the data file is to be recovered at the second host system, the file recovery key is provided at the second host system and the second host system data security device performs a cryptographic operation to transform the file recovery key into a form which is usable to decipher the data file. The second host system data security device then uses the transformed file recovery key to perform a cryptographic operation to obtain the first host system ciphertext in clear form at the second host system.

公开(公告)号：DE3587218T2

公开(公告)日：1993-10-07

申请号：DE3587218

申请日：1985-11-26

Applicant: IBM

Inventor： GDANIEC JOSEPH MARTIN ,  SAHULKA RICHARD JOHN ,  SOLL DAVID BENJAMIN

IPC: G06F15/16 ,  G06F9/44 ,  G06F9/45 ,  G06F9/46

Abstract: @ A method for executing application program written in a high level program language on tightly coupled multiprocessor systems in a Multiple Instruction/Multiple Data (MIMD) environment includes the steps of: initialising a MIMD environment in a data processing system by a call to an initialisation routine from an application program; maintaining the MIMD environment until all independently executable portions of the application program have been executed; scheduling execution of those tasks representing independently executable portions of the application program; synchronising execution and completion of the tasks until all tasks have completed execution; and terminating the MIMD environment on completion of all the tasks.

公开(公告)号：DE3587218D1

公开(公告)日：1993-04-29

申请号：DE3587218

申请日：1985-11-26

Applicant: IBM

Inventor： GDANIEC JOSEPH MARTIN ,  SAHULKA RICHARD JOHN ,  SOLL DAVID BENJAMIN

IPC: G06F15/16 ,  G06F9/44 ,  G06F9/45 ,  G06F9/46

Abstract: @ A method for executing application program written in a high level program language on tightly coupled multiprocessor systems in a Multiple Instruction/Multiple Data (MIMD) environment includes the steps of: initialising a MIMD environment in a data processing system by a call to an initialisation routine from an application program; maintaining the MIMD environment until all independently executable portions of the application program have been executed; scheduling execution of those tasks representing independently executable portions of the application program; synchronising execution and completion of the tasks until all tasks have completed execution; and terminating the MIMD environment on completion of all the tasks.