• Onkar Kulkarni
• Yogesh Dongare
• Trupti Ubale
• Gayatri Nikam
• Rushali Khalkar

In today’s time, Blockchain has being necessary for us as nowadays we are completely dependent on updated technology and device. Decentralizing is a way of data storing which is very difficult or can be said as nearly impossible to alter or hack. with the passing of time, blockchain technology is becoming popular and it already provides a completely secure method of exchanging crypto-currencies which can be extended to the communication field. if the central server fails in the centralized system then it has a higher possibility of data losing as it is stored in a centralized database. the data stored at the central server can be altered or hacked. to have good sharing of information and to do communication the use of system with a centralized approach is helpful. blockchain technology has been seeing wide spread interest means to ensure the integrity, confidentiality and availability of data in trustless environment. authentication technology provides access control for system by checking to see if user’s credentials match the credentials in database authentication server. they are designed to protect data from both internal and external cyber attacks. the proposed system remove its total dependency from centralized players and able to send encrypted messages securely which overcomes the drawbacks of traditional messaging applications and ensures that no network failure can occurs due to central node failure and provides essential security, unchanging nature, quicker settlement, and decentralized framework. the system is implemented with a peer-to-peer network, xmtp libraries, and mobile app development language, and supports crypto wallet, Ethereum platform that enables smart contracts which provide security and traceability to shared content.

Blockchain, XMTP, Flutter, Crypto Wallet, and Decentralized networking

"Blockchain-Based Secure Communication for Smartphones ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.10, Issue 6, page no.a19-a22, June-2023, Available :http://www.jetir.org/papers/JETIR2306004.pdf

"Blockchain-Based Secure Communication for Smartphones ", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.10, Issue 6, page no. ppa19-a22, June-2023, Available at : http://www.jetir.org/papers/JETIR2306004.pdf