Abstract: This application discloses an electronic system including active circuitry configured to be selectively enabled for authorized number of times. The electronic system also includes security circuitry to detect an enablement event associated with the electronic system. The enablement event can correspond to reception of a reset signal associated with the electronic system, a lapse of a predetermined time period, or the like. In response to the detection of the enablement event, the security circuitry can determine a number of times the security circuitry has previously enabled the active circuitry. The security circuitry can generate the enablement signals capable of enabling the active circuitry when the determined number of times the security circuitry has previously enabled the active circuitry is fewer than the authorized number of times.

Abstract: The present disclosure is directed to attack detection through signal delay monitoring. An example system may comprise at least one device including a physical interface. At least one signal delay monitor may determine whether a signal being transmitted to the device is received as expected at the physical interface and indicate a potential attack when the signal is determined to not be received as expected. Determining whether the signal is received as expected may include determining whether the signal is received within a window defining a time period in which receipt of the signal is expected. An example signal monitor may comprise at least a new data reception monitoring module and an expected reception window monitoring module. These modules may include logic to determine whether the signal is received within the window. An indication of a potential attack may trigger, for example, security-related actions in the system.

Abstract: This application discloses an electronic system including active circuitry configured to be selectively enabled for authorized number of times. The electronic system also includes security circuitry to detect an enablement event associated with the electronic system. The enablement event can correspond to reception of a reset signal associated with the electronic system, a lapse of a predetermined time period, or the like. In response to the detection of the enablement event, the security circuitry can determine a number of times the security circuitry has previously enabled the active circuitry. The security circuitry can generate the enablement signals capable of enabling the active circuitry when the determined number of times the security circuitry has previously enabled the active circuitry is fewer than the authorized number of times.

Abstract: The present disclosure is directed to attack detection through signal delay monitoring. An example system may comprise at least one device including a physical interface. At least one signal delay monitor may determine whether a signal being transmitted to the device is received as expected at the physical interface and indicate a potential attack when the signal is determined to not be received as expected. Determining whether the signal is received as expected may include determining whether the signal is received within a window defining a time period in which receipt of the signal is expected. An example signal monitor may comprise at least a new data reception monitoring module and an expected reception window monitoring module. These modules may include logic to determine whether the signal is received within the window. An indication of a potential attack may trigger, for example, security-related actions in the system.