A Secure Chat Application

This Paper presents the design and implementation of an android application for the provision of secure real time communication services between users, based on the AES cryptographic algorithm. As the number of users are increased, Along with these users, there is also increase in number of unauthorized users which are trying to access a data by unfair means. This arises the problem of data security. This arises the problem of data security. It is difficult for the security personnel to send classified information to the sub ordinates without the data breach. Messages sent over an insecure transmission channel from different sources, some messages contain secret data, some messages itself are highly confidential, hence securing them from any attack is essentially required. To solve this problem, we are using AES algorithm for encrypting and decrypting messages in a messaging app. And the messaging app can only be opened by the Biometrics of the authorized user. Moreover, to make it more secure we have also added an extra layer of passcode security. The user has to enter an automatically generated OTP passcode every time when user tries to send any messages on the application. This will ensure that no fake messages will be sent by any other person on the application.