Result shows that this method can obtain the sub-keys and the corresponding plaintexts when the computing complexity of the improving attack is about 241.

A cryptosystem is called semantically secure if an attacker cannot distinguish two encryptions from each other even if the attacker knows (or has chosen) the corresponding plaintexts.

Three are ciphers that can take input plaintexts of large and varying lengths and will output the ith block of the ciphertext after having processed only the first i blocks of the plaintext.