When designing a communication system, security becomes the major issue for the secure transmission of information or data. Therefore, data encryption technique is used in order to secure data transmission during the communication process. Data encryption typically interprets data in a different form, or cryptograph, so that the person holding a secret key (i.e. decryption key) or password can access that data. Then, another question arises later, that of choosing the encryption algorithm to apply depending on the type of data. The complexity finder is mainly used to determine the complexity of the data to be transmitted. A threshold value is set based on which the sensitivity of the data is measured and then the appropriate encryption algorithm is used based on the sensitivity of that particular data. Encryption