Abstract: A CPU comprising multiple cores, a method, a computer program and a computer program product associated with a Security Association (SA) is disclosed. The CPU divides an anti-replay window for the SA into at least two sub anti-replay windows wherein each of the sub anti-replay windows is assigned a sub anti-replay window identifier, and receives a first packet and a second packet, each comprising an integrity protected part. For each of the first packet and the second packet, the CPU determines a sub anti-replay window among the sub anti-replay windows and produces a derived sub anti-replay window identifier. The CPU performs a lookup for the sub anti-replay window using the derived sub anti-replay window identifier for each of the first packet and the second packet against the sub anti-replay window identifier of each of the sub anti-replay windows. The CPU then performs a service.

Abstract: There is provided a method and system (200) for power management of an event-based processing system (100). The system (200) is configured to obtain information representing a history of arrival times of events, wherein the information comprises arrival timestamps of the events. The system (200) is configured to determine a measure for power management based on the timestamps of at least two events represented in the information. The system (200) is also configured to perform power management based on the determined measure.