  Unmanned Aerial Vehicles (UAVs), also known as drones, have exploded in every
segment present in todays business industry. They have scope in reinventing old
businesses, and they are even developing new opportunities for various brands
and franchisors. UAVs are used in the supply chain, maintaining surveillance
and serving as mobile hotspots. Although UAVs have potential applications, they
bring several societal concerns and challenges that need addressing in public
safety, privacy, and cyber security. UAVs are prone to various cyber-attacks
and vulnerabilities; they can also be hacked and misused by malicious entities
resulting in cyber-crime. The adversaries can exploit these vulnerabilities,
leading to data loss, property, and destruction of life. One can partially
detect the attacks like false information dissemination, jamming, gray hole,
blackhole, and GPS spoofing by monitoring the UAV behavior, but it may not
resolve privacy issues. This paper presents secure communication between UAVs
using blockchain technology. Our approach involves building smart contracts and
making a secure and reliable UAV adhoc network. This network will be resilient
to various network attacks and is secure against malicious intrusions.
