摘要:
An approach that smoothes a cryptographic function's timing footprint is presented. A processor includes a “function timing smoother” that smoothes out spikes in the amount of time that a particular cryptographic function requires to execute. When a cryptographic function executes, the function timing smoother tracks the amount of time that the cryptographic function executes (current execution time) and compares the time with the amount of time that the same cryptographic function took for a previous execution (previous execution time). When the current execution time is less than the previous execution time, the function timing smoother adds instructions or varies an execution unit's clock speed in order to increase the cryptographic function's current execution time. Using this approach, a malicious user is not able to decipher sensitive information from the cryptographic function's timing footprint.
摘要:
A system and method to smooth a cryptographic function's timing footprint is presented. A processor includes a “function timing smoother” that smoothes out spikes in the amount of time that a particular cryptographic function requires to execute. When a cryptographic function executes, the function timing smoother tracks the amount of time that the cryptographic function executes (current execution time) and compares the time with the amount of time that the same cryptographic function took for a previous execution (previous execution time). When the current execution time is less than the previous execution time, the function timing smoother adds instructions or varies an execution unit's clock speed in order to increase the cryptographic function's current execution time. Using this approach, a malicious user is not able to decipher sensitive information from the cryptographic function's timing footprint.
摘要:
An approach for controlling lighting in a digital video stream is presented. A user loads digital content into a light tracking system. The digital content includes three tracks, which are a video track, an audio track, and a light control track. After loading, the user selects either a “partial light effect setting” or a “full light effect setting.” When the user selects a partial light effect setting, the light tracking system lowers the environmental lighting device's illumination at the beginning of the digital content's playing, and raises the environmental lighting device's illumination at the end of the digital content's playing. When the user selects a full light effect setting, the light tracking system adjusts the environmental lighting device's illumination throughout the digital content's playback, as well as lowering and raising the environmental lighting device's illumination at the beginning and the end of the movie, respectively.
摘要:
A computer implemented method, apparatus, and computer usable program code for managing a server cluster. The process identifies a plurality of average method call durations corresponding to calls to a plurality of methods associated with an application on the server cluster to form a plurality of identified average method call durations. The process groups the plurality of methods based on the plurality of identified average method call durations to form a plurality of grouped methods. Each method in the plurality of grouped methods is executed by a particular cluster member in the server cluster. The manner in which the plurality of grouped cluster members is grouped reduces a coefficient of variation on each cluster member in the server cluster. The process executes a method in a selected cluster member associated with the method in response to receiving a call for the method.
摘要:
A system, method, and program product are provided that inform users of changes in geographically bound rules. This is performed by receiving, via a GPS device, a first geographic location. Identifying, based on the received first geographic location, a first geographic region, and retrieving a first set of geographically bound rules that correspond to the identified geographic region. After a period of time, a second geographic location is received and a second geographic region is identified based on the second geographic location. If the first geographic region is different than the second geographic region, then the system retrieves a second set of geographically bound rules corresponding to the identified geographic region. The first set of geographically bound rules is compared to the second set of geographically bound rules, resulting in one or more different geographically bound rules. The users are then informed of the different geographically bound rules.
摘要:
A system, method, and program product for updating a software program running in a middleware environment, such as a Java™ environment, are provided. An update request is received for a method loaded in the middleware environment. The request identifies a new version of the method and the method's class file. The new version is registered. Registering of the new version includes writing the new version to a heap managed by the middleware environment. In this manner, both the old version and the new version of the method can be executed. The update of the class file is scheduled for a future time. Subsequent requests are either routed to the old version of the method or re-routed to the new version. At the scheduled time, the class file is updated by replacing the old method with the new version.