The main focus of this research paper is to propose and improvement of the data security using encryption and decryption method in ANN based chaotic generator of original value. The Binary value sequence of ASCII CODE is converted with two initial parameter, and converted value is again decrypted with same initial parameter. In which consists of Binary value of ASCII Code, chaotic neural network algorithm was used for encryption and decryption and it generates the chaotic sequence of random value for each A to Z letter. The generated random value is the encrypted binary ASCII values of A to Z sequence of original ASCII Code binary value, with same initial parameter. For simulation MATLAB software is used. This paper also includes improved experimental results and complete demonstration that ANN Based Chaotic Generator is successfully perform the cryptography.