Security and Privacy Challenges in Cloud Computing

Cloud computing plays a crucial role in supporting the virtualization synergy as there is a large-scale demand among users in adopting cloud solutions. However, preserving the security of storage while maintaining users' privacy brings new challenges in protecting cloud computing from illegal access and shared network environment. Thus, Risk-Adaptable Access Control (RAdAC) is known within privacy-preserving perspective as a flexible prospect in managing exceptional access request and reacting to suspicious user. However, most of the previous work on the cloud security focused on storage security rather than anonymity of user nor identity. This paper explores the fundamental concept of cloud computing architecture and identifies the security requirements in cloud. In this work, the prerequisite elements in RAdAC framework has been discussed precisely and ambiguity factor is found in protecting privacy of user. Thus, we proposed the viable two-factor authentication scheme in RAdAC for future road ahead in cloud industry.