Date Added: Aug 2012
Cloud computing is collaboration of applications and services that run on a distributed environment using virtualized resources and accessed by common internet protocols and networking standards. Due to its feature and availability of its service at low cost it is achieving increased popularity in IT industry. But there are several issues in cloud computing such as security issues, network issues, performance issues, availability etc. which is ruining its growth. As, people store their confidential and private data on cloud, issues related to the security of their data is at the top. The user authentication is the key factors of security in cloud.