  In a number of practical scenarios a wireless device needs to mark its
presence, for instance, to some access point. That enables the access point to
assign the device its transmission slot or update the count of the network
nodes. Many protocols can achieve exactly this result. In this paper, our goal
is to show how that can be done in the simplest messaging model, the so-called
beeping model. Consequently, we constrain our design so that the station does
not send any modulated information in the signal and the receiver actually does
not need to demodulate/decode it. We are interested in sending just a short
signal, so called 'beep'. Moreover, we want to design such protocol that is
resilient to random interference and enables us to identify devices which are
sending the signal, as opposed to only note their presence. To do that, we
leverage temporal correlations of a sequence of beeps issued by a device, as if
the time-moments when they happen come from a pre-defined probability
distribution, that is the fingerpring of the device.
