A Secure and Global Time Synchronization Algorithm in Wireless Sensor Networks
Mojtaba Joukar, Mehdi Bagherizadeh · 2013
Time synchronization protocols for wireless sensor networks are highly taken into consideration due their abundant applications. Among the various algorithms proposed in this regard, the time synchronization protocols operating distributed and globally are being more considered and it has been inclined to these kinds of protocols more than ever in recent years. In addition, these algorithms are being improved to be more secure and have much more efficiency in real environments. Considering some real cases (Presence of malicious and corrupted nodes which generate unexpected values), this paper presents a secure time synchronization protocol that is globally distributed. Encryption, authentication and hashed methods are not highly efficient due their high overhead and getting massive for the exchanged packets in addition to their computational overhead to sync this type of protocols. In the proposed algorithm, we do not make use of previous common used methods such as authentication and encryption methods which have been presented before, rather the algorithm in itself with enforcing some mechanisms attend to presence of malicious and corrupted nodes and performs the time synchronization as distributed and globally. Finally, we review the results gathered from simulations in terms of time, memory and computational overloads, and the efficiency of the proposed algorithm regarding the current conditions will be found out.