As every new technology comes with certain concerns attached to it, same is the story in case of cloud computing. With the promising aspects of cloud computing in every sector, the security issues have further deepened. Cloud computing is optimized for performance, scalability, and resource consumption. All the risk factors associated with normal outsourcing are part and parcel of cloud computing. In addition to this, cloud computing has its own integral problems associated with itself.The most vital concern is the sensitivity attached with the data exposed to CSP (cloud service provider) irrespective of company size. The companies should not negotiatewith the confidentiality of the customer information.This paper discusses the working of two prominent cryptographic algorithms, DES (Data Encryption Standard) and AES (Advanced Encryption Standard) used in the cloud environment with security point of view. The paper elaborates the detailed implementation of both the algorithmsusing Matlab R2009a simulation tool.