Uses of Internet of things (IoT) devices and sensors have increased to a great extent in recent years. In order to facilitate computational and storage needs of low powered end devices for time-sensitive applications such as data analytic, which use IoT devices and sensors to get their work done, a new programming paradigm “Fog computing” has come into existence. Storage and processing capabilities of Fog Computing are similar to that of cloud computing. In addition to this, it facilitates in bringing these services closer to the edge of the network near to low powered end devices. Keeping in view the drawbacks of cloud computing, this article presents a comprehensive review on storage-as-a-service at Fog layer. It elaborates the scope and contribution of keeping storage closer to edge of the network. The article also classifies the current scenario in secure storage as a service near the edge of the network. Further, it discusses about the benefits of implementing storage at Fog layer.

近年来，物联网（IoT）设备和传感器的使用已大大增加。为了满足低功耗终端设备对数据分析等对时间敏感的应用程序的计算和存储需求，这些应用程序使用IoT设备和传感器完成工作，因此出现了一种新的编程范例“雾计算”。雾计算的存储和处理功能与云计算相似。除此之外，它还有助于使这些服务更靠近低功耗终端设备的网络边缘。考虑到云计算的缺点，本文对Fog层的存储即服务进行了全面的回顾。它详细说明了使存储更靠近网络边缘的范围和贡献。本文还将安全存储中的当前方案归类为网络边缘附近的服务。此外，它讨论了在Fog层实现存储的好处。