摘要:
Distributed system simulation is enhanced by extending the simulation window. In a described implementation, the simulation window extension is facilitated with a slow message relaxation scheme. For example, especially when the simulation window is extended, slow unscheduled events can arrive at a logical process with a timestamp that is prior to (e.g., less than) the local time of a receiving logical process that is participating in a simulation. To ameliorate issues created by a slow unscheduled message and its corresponding slow unscheduled event, a current logical time of the receiving logical process is substituted for the original timestamp of the slow unscheduled event to transform it into a punctual unscheduled event.
摘要:
Distributed system simulation is enhanced by extending the simulation window. In a described implementation, the simulation window extension is facilitated with a slow message relaxation scheme. For example, especially when the simulation window is extended, slow unscheduled events can arrive at a logical process with a timestamp that is prior to (e.g., less than) the local time of a receiving logical process that is participating in a simulation. To ameliorate issues created by a slow unscheduled message and its corresponding slow unscheduled event, a current logical time of the receiving logical process is substituted for the original timestamp of the slow unscheduled event to transform it into a punctual unscheduled event.
摘要:
A component-oriented web mashup system and method for communicating between component-oriented Web gadgets to facilitate secure Web mashups. Embodiments of the system and method redefine the traditional definition of gadget to mean a Web component having a verifiable controlled communication channel (a CompoWeb gadget). A CompoWeb gadget is created and defined using new HTML tags and global script objects and functions that extend the functions of the browser. CompoWeb gadget content is treated as a component that is isolated from other gadgets and frames by a browser, and only those allowed access can view data and code therein. Called functions of a CompoWeb gadget are run in the callee's environment instead of the caller's environment. This adds security, because all the requesting CompoWeb gadget receives is the run result. Embodiments of the system and method also include delayed binding of CompoWeb gadgets, such that binding is performed at run time.
摘要:
A security-enhanced login technique that provides a convenient and easy-to-use two factor technique to enhance the security of passwords without requiring any changes on the server side of a client-server network. The technique employs a convenient and easy-to-use two-factor technique to generate strong passwords for Web and other applications. In this technique, a convenient or personal device such as a mouse is used as the other factor besides a user password. A secret stored in the mouse or other personal device is hashed together with the password entered by a user and the server ID, to generate a strong, server-specific password which is used to authenticate the user to the server. This password enhancement operation is carried out inside the personal device.
摘要:
A “Performance Evaluator” provides various techniques for tracking system events to diagnose root causes of application performance anomalies. In general, traces of system events involved in inter-thread interactions are collected at application runtime. These traces are then used to construct inter-thread dependency patterns termed “control patterns.” Control patterns are then evaluated to determine root causes of performance anomalies. Where an application terminates abnormally or full traces cannot be collected for some reason, partial control patterns are constructed for that application. In various embodiments, “fingerprints” are then generated from full or partial control patterns and are matched to fingerprints corresponding to operations in other control patterns extracted from reference traces collected on the same or similar systems. Matched fingerprints or control patterns are then used to deduce the root cause of application performance anomalies associated with full or partial traces.
摘要:
A component-oriented web mashup system and method for communicating between component-oriented Web gadgets to facilitate secure Web mashups. Embodiments of the system and method redefine the traditional definition of gadget to mean a Web component having a verifiable controlled communication channel (a CompoWeb gadget). A CompoWeb gadget is created and defined using new HTML tags and global script objects and functions that extend the functions of the browser. CompoWeb gadget content is treated as a component that is isolated from other gadgets and frames by a browser, and only those allowed access can view data and code therein. Called functions of a CompoWeb gadget are run in the callee's environment instead of the caller's environment. This adds security, because all the requesting CompoWeb gadget receives is the run result. Embodiments of the system and method also include delayed binding of CompoWeb gadgets, such that binding is performed at run time.