Secret Key Cryptosystem based on Polar Codes over Binary Erasure Channel

This manuscript proposes an efficient secret key cryptosystem based on polar codes over Binary Erasure Channel to overcome the main limitations of the original Rao-Nam cryptosystem. This improved cryptosystem has a significant security advantage against chosen plaintext attacks in comparison with the Rao-Nam cryptosystem. Also, the key length of the proposed cryptosystem is decreased by 37 percent after applying a compression/decompression algorithm. Moreover, this scheme benefits from high code rate and proper error performance for reliable communication.