PeerDrop: Implementation of a Mesh-Based Peer-to-Peer Network for Secure Offline Communication

In recent years, Peer to Peer (P2P) Networking and Application have gain a significant attention due to internet's impact on data security.P2P has been a great hotspot since it ensures data security and independence from the internet.The proposed model demonstrates PeerDrop's system-level implementation which stands as a mesh-based peer-to-peer (P2P) messaging system designed solely for offline real-time messaging.The system implements Wi-Fi Direct as its discovery method for direct device communication together with Flutter as its implementation platform to handle interfaces across multiple operating systems.The peer-to-peer networking system PeerDrop operates through a decentralized topology which makes every node function as both a client and relay.An interconnected network allows dynamic messages to spread from one device to multiple others as part of the message distribution process.The PeerDrop system consists of three fundamental operational components which include peer discovery followed by secure connection creation through AES-256 encryption for confidentiality accompanied by data transfer with real-time sockets.The system automatically adjusts through connection management that tracks peer availability for effective communication rerouting.Experimental results demonstrate both fast data transfer and high bandwidth capacities in direct connections while offering analogous network speeds across multiple-hop routes.The system design proves how offline communication should combine usability with security for all users especially in disaster zones alongside rural and remote locations.