The Internet of Things (IoT) provides the ability to digitize physical objects into virtual
data, thanks to the integration of hardware (e.g., sensors, actuators) and network communications for
collecting and exchanging data. In this digitization process, however, security challenges need to be
taken into account in order to prevent information availability, integrity, and confidentiality from
being compromised. In this paper, security challenges of two broadly used technologies, RFID (Radio
Frequency Identification) and Bluetooth, are analyzed. First, a review of the main vulnerabilities,
security risk, and threats affecting both technologies are carried out. Then, open hardware and open
source tools like: Proxmark3 and Ubertooth as well as BtleJuice and Bleah are used as part of the
practical analysis. Lastly, risk mitigation and counter measures are proposed