Implementation of Trivial File Transfer Protocol (TFTP) in embedded system is significant because of the
speed and simplicity. However, no security service in TFTP marks its major limitations. In this work, a
pre-shared Diffie Hellman Key Exchange (DHKE) technique was proposed for mutual authentication to
achieve the same secret key in TFTP communication protocol. We also integrated the system with feasible
compression and encryption process to significantly improve the TFTP communication performance.
The DHKE proof of concept is discussed briefly to show the feasibility of the pre-shared technique
on the protocol. Also, the experiment was performed on constrained embedded devices to analyse the
performance of compression/encryption scheme in TFTP. From the results obtained, the combined
encryption and compression process is able to reduce the time by about 30% compared to the original
file transmission time. Thus, the proposed work presents both advantages to reduce file size and provide
security for the data. This is a preliminary work to provide a secure T
This paper presents a study on node impersonation attack in Wireless Sensor Networks (WSN)
environment. Node cloning is a major attack among sensor where the leak of node identity is easy to clone
if it is not secured. For this purpose, an analysis that explores techniques to prevent node cloning attack
was done using a unique node identity. An algorithm to generate the unique identity was developed on
high performance ARM hardware and programmed the data authentication together with sensor nodes.
Communication among the sensor nodes and base station depends on a successful authentication using the
unique identity (UID). The sensor nodes are resistant against node cloning attack when the UID identity
is unequal. Results present successful generation of the UID, while execution time between two nodes
is faster and low power consumption is used on the technique. The analysis has proven that the unique
UID is secured by the developed node identity algorithms and against cloning attack. This outcome is
significant for new development of secured WSN sensor hardware, which can be implemented in new
network technology.