Wearable devices and associated security apparatus are disclosed. An example apparatus includes a strap including a first conductor and a second conductor, when the strap is open, the first and second conductors are a first distance apart, when the strap is closed, the first and second conductors are a second distance apart, the first distance is greater than the second distance; and a device access enabler, to: provide a reference signal to the first conductor; and monitor a response to the reference signal to determine if the strap is open or closed.