Systems and methods are disclosed for securely transferring research data relating to media exposure data, such as radio, television, streaming media and the Internet. A plurality of portable computing devices seek and bond to a collector via Bluetooth in a specific area, such as a household. The collector authenticates itself with each of the portable computing devices and vice versa where the collector arranges a secure research data transfer session with each respective device using exchanged authentication files. As each secure session is made, each portable computing device transmits stored research data during the session.