公开(公告)号：CA2338414C

公开(公告)日：2006-05-09

申请号：CA2338414

申请日：1999-08-12

Applicant: IBM

Inventor： DOWNS EDGAR ,  GRUSE GEORGE GREGORY ,  DORAK JOHN JR ,  MEDINA CESAR ,  LOTSPIECH JEFFREY ,  HURTADO MARCO ,  LEHMAN CHRISTOPHER ,  MILSTED KENNETH

IPC: G06F21/00 ,  G06F12/14 ,  G06F21/10 ,  G06Q30/00 ,  H04L9/14 ,  H04L9/28 ,  H04L9/30 ,  H04L12/16

Abstract: A system for tracking usage of digital content on user devices. Electronic stores coupled to a network sell licenses to play digital content data to users. Content players, which receive from the network the licensed content data, are used to play the licensed content data. Additionally, a logging site that is coupled to the network tracks the playi ng of the content data. In particular, the logging site receives play information from the network, and the play information includes the number of times that the content data has been played by the associated content player. Also provided is a method for tracking usage of digital content on user devices. According to the method, a license to play digital content data is sold to a user, and the licensed content data is transmitted to a content player for the user. Further, information is transmitted to a logging site whenever the content data is played by the content player or copied from the content player to an external medium so that usage of the licensed content data can be tracked .

公开(公告)号：CA2467998C

公开(公告)日：2006-04-25

申请号：CA2467998

申请日：1999-08-12

Applicant: IBM

Inventor： GRUSE GEORGE GREGORY ,  HURTADO MARCO ,  DORAK JOHN ,  DOWNS EDGAR ,  LEHMAN CHRISTOPHER ,  LOTSPIECH JEFFREY ,  MEDINA CESAR ,  MILSTED KENNETH

IPC: G06F21/00 ,  H04L9/28 ,  G06F12/14 ,  G06F21/10 ,  G06Q30/00 ,  H04L9/14 ,  H04L9/30 ,  H04L12/16

Abstract: A system for tracking usage of digital content on user devices. Electronic stores coupled to a network sell licenses to play digital content data to users. Content players , which receive from the network the licensed content data, are used to play the licensed content dat a. Additionally, a logging site that is coupled to the network tracks the playing of the content data. In particular, the logging site receives play information from the network, and the play information includes the number of times that the content data has been played by the associated content player . Also provided is a method for tracking usage of digital content on user devices. According to t he method, a license to play digital content data is sold to a user, and the licensed content data i s transmitted to a content player for the user. Further, information is transmitted to a logging site whenever the content data is played by the content player or copied from the content player to an external medium so that usage of the licensed content data can be tracked.

公开(公告)号：CA2543572A1

公开(公告)日：2005-06-09

申请号：CA2543572

申请日：2004-11-09

Applicant: IBM

Inventor： LOTSPIECH JEFFREY ,  PLOUFFE WILFRED ,  NIN SIGFREDO ,  JIN HONXIA ,  LEAKE DONALD JR

IPC: G06F1/00 ,  G06F21/00

Abstract: A trusted Java virtual machine provides a method for supporting tamper-resistant applications, ensuring the integrity of an application and its secrets such as keys. The trusted Java virtual machine verifies the integrity of the Java application, prevents debugging of the Java application, and allows the Java application to securely store and retrieve secrets. The trusted Java virtual machine environment comprises a TrustedDictionary, a TrustedBundle, an optional encryption method for encrypting and decrypting byte codes, and an underlying trusted Java virtual machine. The encrypted TrustedDictionary protects data while the TrustedBundle protects programming code, allowing applications to store secret data and secure counters. The application designer can restrict TrustedBundle access to only those interfaces that the application designer explicitly exports. The open source code may optionally be encrypted. Secrets required by the open source programming code of the application are encrypted in TrustedDictionary.

公开(公告)号：CA2467998A1

公开(公告)日：2000-02-24

申请号：CA2467998

申请日：1999-08-12

Applicant: IBM

Inventor： LOTSPIECH JEFFREY ,  HURTADO MARCO ,  LEHMAN CHRISTOPHER ,  GRUSE GEORGE GREGORY ,  DOWNS EDGAR ,  DORAK JOHN ,  MILSTED KENNETH ,  MEDINA CESAR

IPC: G06F21/00 ,  G06F12/14 ,  G06F21/10 ,  G06Q30/00 ,  H04L9/14 ,  H04L9/28 ,  H04L9/30 ,  H04L12/16 ,  G06F17/60

Abstract: A system for tracking usage of digital content on user devices. Electronic stores coupled to a network sell licenses to play digital content data to users. Content players , which receive from the network the licensed content data, are used to play the licensed content dat a. Additionally, a logging site that is coupled to the network tracks the playing of the content data. In particular, the logging site receives play information from the network, and the play information includes the number of times that the content data has been played by the associated content player . Also provided is a method for tracking usage of digital content on user devices. According to t he method, a license to play digital content data is sold to a user, and the licensed content data i s transmitted to a content player for the user. Further, information is transmitted to a logging site whenever the content data is played by the content player or copied from the content player to an external medium so that usage of the licensed content data can be tracked.