Cloud based E-Learning is one of the booming technologies in IT field which brings powerful e-learning products with the help of cloud power. Cloud technology has numerous advantages over the existing traditional E-Learning systems. But at the same time, security is a major concern in cloud based e-learning. So security measures are unavoidable to prevent the loss of users valuable data from the security vulnerabilities. Cloud based e-learning products also need to satisfy the security needs of customers and overcome various security threats which attack valuable data stored in cloud servers....