Cloud computing security has been a fast-growing service which has many features similar to traditional IT security. It comprises of practices like protecting critical information from theft, data deletion,and data leakage. The biggest advantage of cloud services is that one can operate at scale and still remain secure. Cloud security provides new ways of delivering security solutions that address new areas of concern.It provides the users the comfort to perform security-related activities in more agile manner. The central theme of this research paper is to elaborate how secure is the one's data placed on cloud and what are the different security issues one should be concerned about when making use of the cloud. The paper also discusses the functioning and working of two symmetric algorithms, Data Encryption Standard (DES) and Advanced Encryption Standard (AES), responsible for providing cryptography in cloud security.