Text Encryption using Transform Dimension, Bit Plane Slicing, and Chaos System

This study proposes the chaos 2D encryption method for text which is widely used in digital images. For this method, two levels of dimensional transformation are carried out on text messages. The bit-plane slicing operation is performed to separate the entire bit-plane. There are seven bit-planes in plain text. Chaos encryption is performed on all bit-plane messages using different p, q values and iterations to increase security. The values of p, q and the number of iterations are derived from two keys that come from user input and plain text performed by the SHA-256 hash operation. Based on the testing results, the proposed method can improve encryption performance from statistical and differential control. The decryption process can also work perfectly, as evidenced by the value of BER and CER = 0.