Cloud computing has brought about a paradigm shift in Information Technology services globally most especially in developed countries for mid-sized to large scale enterprises. It has emerged as one of the major IT trends of the 21 st century. Cloud computing simply refers to the process of storing and accessing data and applications over the internet in a remote location instead of the localhard drive storage. This has brought about so many advantages in business and has helped improved

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... vity in the organization; costefficiency, scalability, easy access to information, unlimited storage and flexibility are also some of the benefits. However, several challenges abound with the use of cloud computing. Despite the numerous benefits it offers, Security threats and risk stands out as a major constraint for organizations. This paper examines some of the benefits of cloud computing and the challenges in the enterprise environment and factors militating against its full adoption.It focuses more on the security challenges that includes data protection, privacy, security standardsas well as network attacks.