Abstract: A network for electronic communications in which disparate anonymous devices may transmit and receive information, such as in a secure manner. A method for collecting health-related data may, for example, comprise detecting, at a first time, that a sensor has moved within a detection range of a link component, the sensor having not been identified to the link component prior to the first time; receiving data collected by the sensor relating to activity by and/or health of a human subject associated with the sensor; and processing the data to determine at least one indicator of the human subject's health.