ICT Academy of Tamil Nadu
The proposal of indistinguishable encryption in Randomized Arithmetic Coding (RAC) doesn't make the system efficient because it was not encrypting the messages it sends. It re-computes the cipher form of every messages it sends that increases not only the computational cost but also increases the response time. Floating point representation in cipher increases the difficulty in decryption side because of loss in precision. RAC doesn't handle the inference attacks like man-in-middle attack, third party attack etc. In the authors' system, they used Dynamic Matrix Arithmetic Coding (DMAC) dynamic session matrix to encrypt the messages.