A Review on Top-k Query Processing and Prevention of Malicious Nodes Performing DRA and FNA In MANETs

Top-k query processing is an important technique used in mobile ad hoc networks which is used to overcome the challenge of retrieving the data in an environment of less bandwidth and battery life of devices. A query processing is done in several steps to satisfy the required query. The step which retrieves the data with maximum efficiency will be taken for query processing. Top-k query processing will retrieve the data with k highest scores so that only the necessary data sections are retrieved which will save the resources in MANETs. If a normal node changes to a malicious node which will degrade the performance of top-k query processing by allowing attacks. There are many kind of attacks are possible due to malicious nodes. DRA(Data Replacement Attack) and FNA(False Notification Attack) are the major attacks in top-k query processing. This paper deals with several methods of top-k query processing and the effects of DRA and FNA in top-k result.