In day-to-day communications we may need to establish temporary (ad hoc) connections anytime, anywhere. Data transfer through this ad hoc wireless network is required when it is hard to establish the large infrastructure. In MANETs there are many challenges in terms of deploying security especially when the confidentiality of the data is compromised. If the data is highly confidential, then providing security especially in the malicious environment is really a challenging task. Many researchers have however proposed solutions for internal as well as external attacks. But unfortunately everyone has some tradeoffs. Some methods are designed only for specific attacks. Some provide solutions for many attacks but depend on the factors like delay, high resource utilization etc. In this paper, we have in sighted into various security providing techniques that have cumulated from many years. We have attempted to present the current approaches for developing secured systems. These methods have used simple techniques to enhance the security and to reduce the complexity. There are many surveys done before on the security issues and methods. However to our information no one has surveyed the current emerging secured methods which may be more effective than the mostly used ones.