公开(公告)号：EP1573545A4

公开(公告)日：2008-08-27

申请号：EP03774922

申请日：2003-10-22

Applicant: IBM

Inventor： JIN HONGXIA ,  LOTSPIECH JEFFREY B

IPC: G06F1/00 ,  G06F11/30 ,  G06F12/14 ,  G06F21/00 ,  H04L9/32

CPC classification number: G06F21/14 ,  G06F21/316 ,  G06F21/552 ,  G06F2221/2101

Abstract: Software intrusion is proactively detected using a dynamically evolving audit log (404) wherein log entries are generated in the audit log (404) and key values (406) are evolved based upon a one-way function (408) depending on both the previous log (404) entry and the previous key (406). The audit log (404) with the generated log entries and the final key value is transmitted to a clearinghouse (410) that detects software intrusion by analyzing these values. In an effort to reduce the size of the log (404) to be transmitted, the log entries are assigned identical values, thereby only needing to transmit one log entry and the last key value to the clearinghouse (410).

公开(公告)号：CA2623182C

公开(公告)日：2014-10-07

申请号：CA2623182

申请日：2006-09-11

Applicant: IBM

Inventor： LOTSPIECH JEFFREY BRUCE ,  NIN SIGFREDO ISMAEL ,  JIN HONGXIA

IPC: H04L9/08

Abstract: A system, method, and computer program product to renewably prevent traitors in a broadcast encryption system from re-using compromised keys. A license agency assigns individual receivers a set of Sequence Keys preferably at manufacture, and assigns Sequence Key Blocks (SKBs) to protected content files to be distributed. The files may be distributed on prerecorded media and typically include several file modifications . The particular modifications in a pirated version of a file can help identify which traitors contributed to its theft. SKBs assigned to new files distributed after traitors have been identified cannot be usefully processed using the compromised keys employed in previous content piracy. Innocent receivers that happen to have compromised key(s) in common with traitors can use a replacement uncompromised Sequence Key from the set to usefully decrypt content. Traitors will however step through all their Sequence Keys without reaching one that will work.

公开(公告)号：CA2505477C

公开(公告)日：2009-10-13

申请号：CA2505477

申请日：2003-10-22

Applicant: IBM

Inventor： LOTSPIECH JEFFREY B ,  JIN HONGXIA

IPC: G06F11/30 ,  G06F12/14 ,  G06F21/00 ,  H04L9/32

Abstract: Software intrusion is proactively detected using a dynamically evolving audi t log (404) wherein log entries are generated in the audit log (404) and key values (406) are evolved based upon a one-way function (408) depending on bo th the previous log (404) entry and the previous key (406). The audit log (404) with the generated log entries and the final key value is transmitted to a clearinghouse (410) that detects software intrusion by analyzing these value s. In an effort to reduce the size of the log (404) to be transmitted, the log entries are assigned identical values, thereby only needing to transmit one log entry and the last key value to the clearinghouse (410).

公开(公告)号：BRPI0617419A2

公开(公告)日：2011-07-12

申请号：BRPI0617419

申请日：2006-09-11

Applicant: IBM

Inventor： LOTSPIECH JEFFREY BRUCE ,  NIN SIGFREDO ISMAEL ,  JIN HONGXIA

IPC: H04L9/08

Abstract: A system, method, and computer program product to renewably prevent traitors in a broadcast encryption system from re-using compromised keys. A license agency assigns individual receivers a set of Sequence Keys preferably at manufacture, and assigns Sequence Key Blocks (SKBs) to protected content files to be distributed. The files may be distributed on prerecorded media and typically include several file modifications. The particular modifications in a pirated version of a file can help identify which traitors contributed to its theft. SKBs assigned to new files distributed after traitors have been identified cannot be usefully processed using the compromised keys employed in previous content piracy. Innocent receivers that happen to have compromised key(s) in common with traitors can use a replacement uncompromised Sequence Key from the set to usefully decrypt content. Traitors will however step through all their Sequence Keys without reaching one that will work.

公开(公告)号：DE602006007019D1

公开(公告)日：2009-07-09

申请号：DE602006007019

申请日：2006-09-11

Applicant: IBM

Inventor： LOTSPIECH JEFFREY BRUCE ,  NIN SIGFREDO ISMAEL ,  JIN HONGXIA

IPC: H04L9/08

Abstract: A system, method, and computer program product to renewably prevent traitors in a broadcast encryption system from re-using compromised keys. A license agency assigns individual receivers a set of Sequence Keys preferably at manufacture, and assigns Sequence Key Blocks (SKBs) to protected content files to be distributed. The files may be distributed on prerecorded media and typically include several file modifications. The particular modifications in a pirated version of a file can help identify which traitors contributed to its theft. SKBs assigned to new files distributed after traitors have been identified cannot be usefully processed using the compromised keys employed in previous content piracy. Innocent receivers that happen to have compromised key(s) in common with traitors can use a replacement uncompromised Sequence Key from the set to usefully decrypt content. Traitors will however step through all their Sequence Keys without reaching one that will work.

公开(公告)号：CA2505477A1

公开(公告)日：2004-07-22

申请号：CA2505477

申请日：2003-10-22

Applicant: IBM

Inventor： LOTSPIECH JEFFREY B ,  JIN HONGXIA

IPC: G06F11/30 ,  G06F12/14 ,  G06F21/00 ,  H04L9/32

Abstract: Software intrusion is proactively detected using a dynamically evolving audi t log (404) wherein log entries are generated in the audit log (404) and key values (406) are evolved based upon a one-way function (408) depending on bo th the previous log (404) entry and the previous key (406). The audit log (404) with the generated log entries and the final key value is transmitted to a clearinghouse (410) that detects software intrusion by analyzing these value s. In an effort to reduce the size of the log (404) to be transmitted, the log entries are assigned identical values, thereby only needing to transmit one log entry and the last key value to the clearinghouse (410).

公开(公告)号：ES2327273T3

公开(公告)日：2009-10-27

申请号：ES06793423

申请日：2006-09-11

Applicant: IBM

Inventor： LOTSPIECH JEFFREY BRUCE ,  NIN SIGFREDO ISMAEL ,  JIN HONGXIA

IPC: H04L9/08

Abstract: Un método para prevenir la reutilización de claves comprometidas en un sistema de codificación de emisión, caracterizado por: (a) incorporar un conjunto particular de claves de secuencia asignadas por una agencia de licenciamiento a receptores individuales; (b) asignar un bloque de claves de secuencia (en adelante SKB) por la agencia de licenciamiento al menos a un archivo protegido distribuido; (c) pruebas criptográficas incrementales por los receptores individuales para determinar (200) si una clave de secuencia seleccionada está comprometida; (d1) si la clave de secuencia seleccionada no está comprometida, entonces descodificar adecuadamente en respuesta (202) el archivo y finalizar el método; (d2) si la clave de secuencia seleccionada está comprometida, entonces determinar en respuesta (204) si se dispone de una clave de secuencia subsiguiente del conjunto; (e1) si está disponible una clave de secuencia subsiguiente, entonces seleccionar (206) esa clave de secuencia subsiguiente y volver a la etapa (c); y (e2) si no está disponible una clave de secuencia subsiguiente, entonces el método termina (208) sin descodificar apropiadamente el archivo.

公开(公告)号：AT432560T

公开(公告)日：2009-06-15

申请号：AT06793423

申请日：2006-09-11

Applicant: IBM

Inventor： LOTSPIECH JEFFREY ,  NIN SIGFREDO ,  JIN HONGXIA

IPC: H04L9/08

Abstract: A system, method, and computer program product to renewably prevent traitors in a broadcast encryption system from re-using compromised keys. A license agency assigns individual receivers a set of Sequence Keys preferably at manufacture, and assigns Sequence Key Blocks (SKBs) to protected content files to be distributed. The files may be distributed on prerecorded media and typically include several file modifications. The particular modifications in a pirated version of a file can help identify which traitors contributed to its theft. SKBs assigned to new files distributed after traitors have been identified cannot be usefully processed using the compromised keys employed in previous content piracy. Innocent receivers that happen to have compromised key(s) in common with traitors can use a replacement uncompromised Sequence Key from the set to usefully decrypt content. Traitors will however step through all their Sequence Keys without reaching one that will work.

公开(公告)号：CA2623182A1

公开(公告)日：2007-04-12

申请号：CA2623182

申请日：2006-09-11

Applicant: IBM

Inventor： LOTSPIECH JEFFREY BRUCE ,  NIN SIGFREDO ISMAEL ,  JIN HONGXIA

IPC: H04L9/08

Abstract: A system, method, and computer program product to renewably prevent traitors in a broadcast encryption system from re-using compromised keys. A license agency assigns individual receivers a set of Sequence Keys preferably at manufacture, and assigns Sequence Key Blocks (SKBs) to protected content files to be distributed. The files may be distributed on prerecorded media and typically include several file modifications. The particular modifications in a pirated version of a file can help identify which traitors contributed to its theft. SKBs assigned to new files distributed after traitors have been identified cannot be usefully processed using the compromised keys employed in previous content piracy. Innocent receivers that happen to have compromised key(s) in common with traitors can use a replacement uncompromised Sequence Key from the set to usefully decrypt content. Traitors will however step through all their Sequence Keys without reaching one that will work.

公开(公告)号：AU2003282989A1

公开(公告)日：2004-07-29

申请号：AU2003282989

申请日：2003-10-22

Applicant: IBM

Inventor： JIN HONGXIA ,  LOTSPIECH JEFFREY B

IPC: G06F11/30 ,  G06F12/14 ,  G06F21/00 ,  H04L9/32

Abstract: Software intrusion is proactively detected using a dynamically evolving audit log wherein log entries are generated in the audit log and key values are evolved based upon a one-way function depending on both the previous log entry and the previous key. The audit log with the generated log entries and the final key value is transmitted to a clearinghouse that detects software intrusion by analyzing these values. In an effort to reduce the size of the log to be transmitted, the log entries are assigned identical values, thereby only needing to transmit one log entry and the last key value to the clearinghouse.