Figure.5. Block Diagram of Selective Encryption of Plaintext using multiple indexing
For encryption technique, we decided to use 128bit AES. Since 128bit AES has 10 rounds we proposed to have maximum number of rounds be 10 rounds. In addition to this, we propose that maximum number of rounds for the proposed algorithm be based on the security level or we can refer it as cipher complexity. Based on different security level as per user requirement, the maximum number of rounds can be selected.
Table 1. Relation Between the Cipher_Complexity and Number of Rounds