In this paper a novel soft computing based cryptographic technique based on synchronization of two Kohonen's Self-Organizing Feature Map (KSOFM) between sender and receiver has been proposed. In this proposed technique KSOFM based synchronization is performed for tuning both sender and receiver. After the completion of the tuning identical session key get generates at the both sender and receiver end with the help of synchronized KSOFM. This synchronized network can be used for transmitting message using any light weight encryption/decryption algorithm with the help of identical session key of the synchronized network. Exhaustive parametric tests are done and results are compared with some existing classical techniques, which show comparable results for the proposed system.