Index based symmetric block encryption
K. Sashank, B. Dinesh Reddy, Santosh Kumar · 2011
Based on the principle of symmetric key encryption we present a new method of symmetric block encryption using indices called Index-Based Symmetric Block Encryption. Instead of going through a number of tedious rounds while encrypting the data, the data can be encrypted in just two rounds. Also, no two identical data blocks have the same ciphers, i.e. if a single block has been encrypted twice we don't get identical ciphers. There by avoiding linear cryptanalysis and chosen cipher text attack. Encrypting the same document twice doesn't yield the same set of ciphers.