Integrated circuits, apparatuses and methods are disclosed, such as a method that includes generating an internal clock signal, receiving an external clock signal, and providing a mixed clock signal at an output. Such secure identification element is then submitted to a requesting entity in order to access the user’s personal information. The tube being tested prior to and during sealing. An imaging device and a camera employ this zoom lens system. The TCUEP associates a second instruction timestamp with each of the second instructions.