Cloud computing is the outsourcing of communications relevant to IT sector via the use of the internet and maintaining own software and hardware environment. It is an on-demand service facilitated by CSP (Cloud Service Provider). It is available whenever one need it, as much he/she need, and one pays for what he/she use. Security factor is a primary concern of cloud environment. In this research paper along with discussing the basics of cloud computing and the threats involved in a cloud environment, the two main algorithms of cryptography, DES (Data Encryption Standard) and AES (Advanced Encryption Standard) has been elaborated with their individual practical implementation detailing the conversion of plain text to cipher text and vice versa.