  Multipath routing in Mobile Ad Hoc Network (MANET) plays a significant
concern for secured data transmission by avoiding the attack nodes in the
network. In order to overcome such limitations, a Winnow Trust based Multipath
Route Discovery (WT-MRD) Mechanism is proposed. It constructs multiple paths
from source to destination with higher security and lesser time. Initially, the
trust value of each node is calculated based on the node cooperative count,
data packet forwarding rate and packet drop rate by Neighbor Node-based Trust
Calculation (NN-TC) Model. After calculating the trust value, the nodes are
classified as normal or malicious by using Winnow Linear Multiplicative
Classification (WLMC) Algorithm. With the help of normal nodes, the WT-MRD
Mechanism finds multipath from source to destination by sending a two control
message RREQ and RREP. Source node transmits a route request RREQ to the
neighboring node for constructing the multiple route paths. After receiving the
RREQ message, the neighboring node maintains the route table where the source
information and next hop information are present. Then Route Reply (RREP)
messages are sent from neighboring node to source node. By this way, multiple
route paths from source to destination are constructed with a higher security
level. Keywords: Cooperative Count, Data Packet Dropped Rate, Data Packet
Forwarded Rate, Multipath Routing, Security, Trust Value, Winnow Linear
Multiplicative Classification
