1. A trust management system for decision fusion in a network, the trust management system comprising: a detection subsystem comprising a plurality of sensors, each sensor of the plurality of sensors configured to detect one of an occurrence and a non-occurrence of an event in the network, the each sensor of the plurality of sensors further configured to perform a binary hypothesis testing for providing a decision based on the one of the occurrence and the non-occurrence of the event in the network; a plurality of channels, each channel of the plurality of channels communicably coupled to a corresponding sensor of the detection subsystem to receive the decision from the corresponding sensor and to further transmit the received decision; and a fusion subsystem communicably coupled to the detection subsystem through the plurality of channels for receiving the transmitted decision of the each sensor and iteratively assigning a pre-determined weightage to the each sensor based on the decision, the fusion subsystem configured to ascertain a summation of respective decisions of the plurality of sensors based on the pre-determined weightage for the each sensor and to compare the weighted summation of the respective decisions to a corresponding decision of the each sensor, the fusion subsystem further configured to update the assigned pre-determined weightage corresponding to the each sensor based on the comparison of the weighted summation with the corresponding decision, and to determine the presence of the each sensor being one of a compromised sensor and a non-compromised sensor based on the comparison of the updated pre-determined weightage to a first threshold value.