Any untoward incident occurs while transmitting data digitally may lead to threats whenever the data is transmitted to malicious destination unknowingly, there arises a question of data integrity. In this scenario cryptography plays a crucial role in ensuring the users both confidentiality and integrity while transmitting of data over various network platform, supporting with the algorithms like AES, hashing etc., to ensure end user safety. In this paper, an improved hybrid cryptography system which is a combination of message digest and symmetric key algorithm is being incorporated. This proposed system provides confidentiality as well as integrity.