You are presented with multiple paper abstracts, alongside the associated literature review and chapter titles. Given the provided information, you are going to do a literature review. Please generate a coherent literature review that synthesizes the content, draws connections between different works, highlights major findings, and identifies any gaps in the existing research.

Literature Review Title: Security challenges in mobile ad hoc networks:a survey 
Chapter Title:  Cluster-based Security: 
1. Abstract of Cited Paper (BIB001):  The migration from wired network to wireless network has been a global trend in the past few decades. The mobility and scalability brought by wireless network made it possible in many applications. Among all the contemporary wireless networks, Mobile Ad hoc Network (MANET) is one of the most important and unique applications. MANET is a collection of autonomous nodes or terminals which communicate with each other by forming a multi-hop radio network and maintaining connectivity in a decentralized manner. Due to the nature of unreliable wireless medium data transfer is a major problem in MANET and it lacks security and reliability of data. A Key management is vital part of security. This issue is even bigger in wireless network compared to wired network. The distribution of keys in an authenticated manner is a difficult task in MANET and when a member leaves or joins it need to generate a new key to maintain forward and backward secrecy. In this paper, we propose a Clustering based Group Key Management scheme (CGK) that is a simple, efficient and scalable Group Key management for MANETs and different other schemes are classified. Group members compute the group key in a distributed manner.

Literature Review:
These approaches use clustering in order to provide more efficient situations for security protocols. Generally in these approaches, clusters are used for key distribution or as central management for controlling other nodes. Using clustering for security goals is important as it could solve problems in key distribution or key management. Authors in BIB002 BIB001 provides a key distribution mechanism by using clusters. Clustering can solve some of security challenges but cluster creation and maintenance is highly challengeable due to MANET's dynamic topology. In incorporating approaches based on application, one challenge may be more important than the other one. For example, when selecting best path in routing is not as important as security, an approach can choose more secure paths without emphasizing on best routing path. As an example, in AODV routing protocol, the path with low sequence number is chosen as the best path. The reason is that, if there be a malicious node, it will send high sequence number. Using these benefits of incorporating approaches, both challenges will be solved with better security parameters.