Cloud computing is individually defined and talked about across the ICT industry under different context and with different definitions attached to it. The mainstay point is that cloud computing means having a server firm that can host the services for users connected to it by a network. Technology has moved in this direction because of the advancement in computing, communication and networking technologies. Cloud computing is clearly one of the most enticing technology areas of the current times of computing and networking, at least in part to its cost-efficiency and flexibility. There are significant, persistent concerns about cloud computing that are impeding the momentum and will eventually compromise the goals of cloud computing procurement model. Transparency is needed for regulatory reasons and to ease concern over the potential for data breaches. Open source software enables IT to quickly build and deploy applications, but at the cost of control and governance. For the enhancement of technology, and hence healthy growth of global economy, it is extremely important to iron out any issues that can cause road-blocks in this new paradigm of computing. This review paper gives an insight to various issues that hinder the momentum of cloud implementation and accelerate concerns for customers while adopting cloud services.