A Secured Framework for Encrypted Messaging Service for Smart Device (Crypto-Message)

Abstract

The involvement of technology in our life makes it more advance and provides access on our fingertip. It provides us with the capability to get connected with people and explore the information on the topics which is very beneficial for the ease of life. Thus our lives are dependent on several mobile chatting applications which offer different security to user and chatting details but leads to increase in vulnerabilities and risk of attack on data. As in sensitive business and legal conversation data security is most important for preventing from unwanted hacking activities. To overcome this kind of situation, it is proposed an encrypted messaging protocol for secure conversation. In the present world, there is a lot of encrypted messaging applications, but all those are based on a software generated encryption key along with SQLite database which is used to store the message of respective users which are not secure and the messages of any user can be obtained by a third party. But the proposed protocol uses a user-defined password for SHA-2 hash generation which is used as the key of AES-256 encryption for encrypting the message during the transition of message; on the other hand, our software stored encrypted message which will be decrypted by user in time of accessing the conversation by the introduction of user-defined key only. Through this approach, it can create a more secure atmosphere for the transition of data across the globe.

Appendix

Snapshots of android application Fig. 7.

Fig. 7.

Screenshot of android application: a register a new user, b user login, c add a new friend, d friend list, e encryption key input, f chat activity, g new message notification, and h side drawer activity