• ISHWARYA S
• Dr.Arbind kumar Gupta

Privacy and Security playing crucial role in the applications of two-tiered sensor networks. The storage nodes, which act as a intermediate node between the source and the sink, which could be compromised so attackers can easily steal sensitive data and calculate query results. Existing schemes on secure query processing are weak, because they reveal non-negligible information, and therefore, attackers can statistically measure the data values with the help of domain knowledge and the history of query results. It is challenging to process range query while still protecting sensitive data from dis-closure. Existing work mainly focuses on privacy-preserving range query, but neglects the damage of collusion attacks, probability attacks and differential attacks. In this paper, we propose the first top-k query processing scheme that protects the privacy of sensor data and also provides the security for query results. To preserve privacy, it is necessary to construct an index for each sensor collected data item using pseudo-random hash function and Bloom filters and transform top-k queries into top- range queries. Initially we have to apply mapping technique to sensor data before sending the information to storage node.

Privacy, Security, Top-k Query, Wireless Sensor Network, Bloom Filter.

"private and secure storage of wireless sensor data in potentially insecure storage node", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 6, page no.995-999, June-2019, Available :http://www.jetir.org/papers/JETIR1906F03.pdf

"private and secure storage of wireless sensor data in potentially insecure storage node", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 6, page no. pp995-999, June-2019, Available at : http://www.jetir.org/papers/JETIR1906F03.pdf