A method, an apparatus, a system, and a computer program product are presented for validating certificates. The enhanced SEDA stage can include an event queue configured to enqueue a plurality of events, an event handler programmed to process events in the event queue, and a thread pool coupled to the event handler. Movement of one or more array bars may be used to vector the thrust of the missile, providing roll, yaw, or spinning of the missile, for example. The source and drain contact are both doped with a high density second conductivity type. Keystrokes and mouse cursor movements which would allow exiting the ToL client are prevented.