公开(公告)号：EP0711480B1

公开(公告)日：1997-06-11

申请号：EP93917657.4

申请日：1993-07-27

申请人： International Business Machines Corporation

发明人： JANSON, Philippe ,  TSUDIK, Gene

IPC分类号： H04L9/32

CPC分类号： H04L9/0897 ,  H04L9/0827 ,  H04L9/0833 ,  H04L9/321

摘要： A method and system for providing secure authenticated cryptographic key distribution in a communication system has properties very similar to a Two-Party Authentication Protocol. A new group key is distributed by a server to a selected group of users in the system. A braided structure of the meassages sent by the server to each user allows achieving authentication and, at the same time, secure and secret key distribution. Moreover, the braided structure makes it possible to construct minimal-length protocol messages.

公开(公告)号：EP0505658B1

公开(公告)日：1996-02-28

申请号：EP91810224.5

申请日：1991-03-27

申请人： International Business Machines Corporation

发明人： Van As, Harmen, Dr. ,  Lemppenau, Wolfram, Dr.

IPC分类号： H04L12/403 ,  H04L12/423

CPC分类号： H04L12/417 ,  H04L12/2852

公开(公告)号：EP0689722A1

公开(公告)日：1996-01-03

申请号：EP93905317.0

申请日：1993-03-08

申请人： International Business Machines Corporation

发明人： GERBER, Christoph ,  LOCQUET, Jean-Pierre

IPC分类号： C30B31 ,  C25D15 ,  H01L21 ,  H01L39

CPC分类号： H01L39/2464 ,  G01Q80/00 ,  H01L39/2496

摘要： A doping method for a solid host material (2), preferably a film, using an electrochemical cell (1, 2, 5, 6) and the host material (2) as one of the electrodes, wherein the doping is confined to a selected region of the host material by using either a specially designed counterelectrode, for example a tip (1), or by covering the host material (2) by a layer with the exception of the selected region. The method is especially suitable for using oxygen as dopant and the preparation of oxide superconductors. By using control devices and (piezoelectric) transducers known from the scanning tunneling microscope, doped regions of submicron resolution can be produced.

公开(公告)号：EP0471130B1

公开(公告)日：1995-12-06

申请号：EP90810614.9

申请日：1990-08-16

申请人： International Business Machines Corporation

发明人： Cideciyan, Roy Daron, Dr. ,  Zurfluh, Erwin Alex

IPC分类号： H03M7/14 ,  G11B20/14 ,  H04L25/49

CPC分类号： H03M5/145 ,  G11B20/1426 ,  G11B2020/1438 ,  H04L25/4908

公开(公告)号：EP0544968B1

公开(公告)日：1995-09-27

申请号：EP91810943.0

申请日：1991-12-05

申请人： International Business Machines Corporation

发明人： Gfeller, Fritz, Dr. ,  Jäckel, Heinz, Dr. ,  Meier, Heinz, Dr.

IPC分类号： H01S3/085

CPC分类号： H01S5/16 ,  H01S5/3081

公开(公告)号：EP0573724B1

公开(公告)日：1995-09-13

申请号：EP92810438.9

申请日：1992-06-09

申请人： International Business Machines Corporation

发明人： Forster, Theodor ,  Harder, Christoph, Dr. ,  Oosenbrug, Albertus ,  Rubloff, Gary W.

IPC分类号： H01S3/025

CPC分类号： H01S5/0201 ,  H01S5/0202 ,  Y10S148/028

公开(公告)号：EP0288711B1

公开(公告)日：1995-02-22

申请号：EP88104095.0

申请日：1988-03-15

申请人： International Business Machines Corporation

发明人： Cuomo, Jerome John ,  Guarnieri, C. Richard ,  Rosenberg, Robert ,  Sek-On Yee, Dennis ,  Walker, George Frederick

IPC分类号： H01L39/24 ,  H01L39/12 ,  C23C4/10

CPC分类号： H01L39/2445 ,  C23C4/11

公开(公告)号：EP0303813B1

公开(公告)日：1994-10-12

申请号：EP88110699.1

申请日：1988-07-05

申请人： International Business Machines Corporation

发明人： Chaudhari, Praveen

IPC分类号： H01L39/12 ,  H01L39/24 ,  H01L39/14

CPC分类号： H01L39/126 ,  H01L39/2483

公开(公告)号：EP0432337B1

公开(公告)日：1994-08-03

申请号：EP89810951.7

申请日：1989-12-13

申请人： International Business Machines Corporation

发明人： Fink, Hans-Werner, Dr. ,  Schmid, Heinz ,  Stocker, Werner

IPC分类号： H01J37/12

CPC分类号： H01J37/12

公开(公告)号：EP0363550B1

公开(公告)日：1994-08-03

申请号：EP88810704.2

申请日：1988-10-14

申请人： International Business Machines Corporation

发明人： Pohl, Wolfgang Dieter, Dr. ,  Schneiker, Conrad W. Department of Anesthesiology

IPC分类号： G11B9/00 ,  G11B21/21 ,  G01N27/00 ,  H01L27/20

CPC分类号： G11B9/1445 ,  G01Q60/16 ,  G01Q70/06 ,  G01Q80/00 ,  G11B5/00 ,  G11B5/012 ,  G11B9/08 ,  G11B9/14 ,  G11B9/1418 ,  G11B21/21 ,  H01L27/20 ,  Y10S977/861 ,  Y10S977/872