Data mining Security Sybil attack Wireless Sensor Network Aerodynamic objects Classification Cryptography Hybrid model K-means Key Management Naive Bayes Noise prediction Pairwise Keys RBF network Static wireless sensor networks VIKOR method Wireless sensor networks XED algorithm breast cancer dynamic ID assignment hybrid model meta-search engine mobile node multi-criteria decision-making multi-tree structure observer node ranking replica node attack search engines wireless sensor network; mobile nodes; security; replication attack