  In this paper, we propose a decentralized, privacy-friendly energy trading
platform (PFET) based on game theoretical approach - specifically Stackelberg
competition. Unlike existing trading schemes, PFET provides a competitive
market in which prices and demands are determined based on competition, and
computations are performed in a decentralized manner which does not rely on
trusted third parties. It uses homomorphic encryption cryptosystem to encrypt
sensitive information of buyers and sellers such as sellers$'$ prices and
buyers$'$ demands. Buyers calculate total demand on particular seller using an
encrypted data and sensitive buyer profile data is hidden from sellers. Hence,
privacy of both sellers and buyers is preserved. Through privacy analysis and
performance evaluation, we show that PFET preserves users$'$ privacy in an
efficient manner.
