In 21 st century the digitalization of the processes and information has taken place very rapidly. Every organization in the competitive era has the confidential information and processes. The success of every organization is based on the security of such secret data and information. Confidential data,information,processes plays a vital role in development of the enterprise,in order to withstand in this market with a huge business competitors . Security of such information is really a challenge and many researcher s have tried addressing this problem in last decade. Theft of such data may include the product development information,research data,business plans,financial details,list of the customers. It has been observed in the research that most of the times such data is stolen by insiders. Authors have tried to present the overview of various solutions proposed by researchers in past decade. https://www.ijiert.org/paper-details?paper_id=140880