International Journal of Computer Theory and Engineering (IJCTE)
An artificial intelligence based mutual authentication system with four entities is developed keeping any eye to enhancing threat and hacking in mobile network. Since voice frequency lies between 0-3.5KHz, a person talking some specific word in different times is always consisting of a very narrow range of frequencies which are varying person to person. Voice frequency of the salutation or selective words used by a subscriber at the beginning of conversation like hello, good morning, namaskar, etc. is taken as first entity for authentication purpose.