As an important branch of the Internet of Things, Internet of Drones (loD) is changing the way of human life. However, loD suffer cyber attacks in practice. In 2021, Hussain et al. proposed an loD authentication scheme based on Elliptic Curve Cryptography (ECC) to solve this problem. Through analysis, their scheme is expensive to calculate and difficult to adapt to loD environment. As a result, a new lightweight authentication scheme based on secure one-way hash function and bitewise XOR operations was proposed. The experimental results show that the proposed scheme not only guarantees the safety, but also has lower computation cost. Thus, it is more suitable for loD.