Aspects of the present disclosure relate to a secure data transfer method, including identifying a second head worn computing system (“HWC”) in close proximity to a first HWC, wherein the step of identifying the HWC includes comparing a geo-spatial location of each of the first and second HWCs, determining that the first and second HWCs have viewing angles that are substantially aligned, of opposite direction and positioned such that they are predicted to be facing each other, wherein the substantial alignment is determined by a comparison of sensor data from each of the first and second HWCs, and causing information to be shared between the first and second HWC.