Proxibity is a platform that enables proximity-based cryptocurrency payments and smart contracts. It uses beacon technology and mobile devices to detect when users are in proximity to each other or nearby locations. This allows for use cases like crowdfunding projects located nearby, finding and paying for concerts or taxis in the user's proximity, and retail promotions targeted to customers in a store. The platform generates proximity keys and smart contracts to facilitate authenticated payments between users and merchants using cryptocurrencies while ensuring protection for both parties.