Abstract

Cloud is nascent and rapidly evolving model, with new aspects and capabilities being announced regularly. It is better to prevent security threats before they enter into the systems and there is no way how this can be prevented without knowing where they come from. Many existing trust mechanisms played a vital role and done their best in giving trust but even though still best is needed. So we done our best in this survey paper to examine risks, trust, trends and solutions to consider when using cloud computing in a mathematical way using Policy Based trust and some encryption techniques.