A Review on Key Management Schemes in MANET
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paper_title: An efficient group key management scheme for mobile ad hoc networks

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Group key management is one of the basic building blocks in collaborative and group-oriented applications in Mobile AdHoc Networks (MANETs). Group key establishment involves creating and distributing a common secret for all group members. However, key management for a large and dynamic group is a difficult problem because of scalability and security. Modification of membership requires the group key to be refreshed to ensure backward and forward secrecy. In this paper, we propose a Simple and Efficient Group Key (SEGK) management scheme for MANETs. Group members compute the group key in a distributed manner.
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paper_title: Distributed symmetric key management for mobile ad hoc networks

paper_content:

Key management is an essential cryptographic primitive upon which other security primitives are built. However, none of the existing key management schemes are suitable for ad hoc networks. They are either too inefficient, not functional on an arbitrary or unknown network topology, or not tolerant to a changing network topology or link failures. Recent research on distributed sensor networks suggests that key pre-distribution schemes (KPS) are the only practical option for scenarios where the network topology is not known prior to deployment. However, all of the existing KPS schemes rely on trusted third parties (TTP) rendering them inapplicable in many ad hoc networking scenarios and thus restricting them from wide-spread use in ad hoc networks. To eliminate this reliance on TTP, we introduce distributed key pre-distribution scheme (DKPS) and construct the first DKPS prototype to realize fully distributed and self-organized key pre-distribution without relying on any infrastructure support. DKPS overcomes the main limitations of the previous schemes, namely the needs of TTP and an established routing infrastructure. It minimizes the requirements posed on the underlying networks and can be easily applied to the ad hoc networking scenarios where key pre-distribution schemes were previously inapplicable. Finally, DKPS is robust to changing topology and broken links and can work before any routing infrastructure has been established, thus facilitating the widespread deployment of secure ad hoc networks.
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paper_title: Self-Organized Public-Key Management for Mobile Ad-Hoc Networks

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Ad-hoc networks are the networks do not rely on fixed infrastructure. In such network all the networking functions are performed by the nodes in a self organized manner. Due to infrastructure less architecture security in communication is of a major concern. Ad-hoc networks are the evolving technology in wireless networks. In such network all the networking functions are performed by the nodes in a self organized manner. The main objective is to develop a fully self-organized public-key management system for Ad-hoc networks aims to realize a public-key cryptographic method to perform authentication regardless of the network partitions and without any centralized services. The Security method to be realized is based on self organization among network nodes by updating information.
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paper_title: Secure and highly efficient three level key management scheme for MANET

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MANET(Moving Ad hoc Network) is a convenient infrastructure-less communication network which is commonly susceptible to various attacks. Many key management schemes for MANETs are presented to solve various security problems. Identity (ID)-based cryptography with threshold secret sharing, ECC and Bilinear Pairing computation is a popular approach for the key management design. In this article, we adopt these approaches to construct tree structure and cluster structure ad hoc network which has three level security communication framework. After constructing the security structure, we evaluate the security performance and efficiency of the scheme in detail.
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paper_title: URSA: ubiquitous and robust access control for mobile ad hoc networks

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Restricting network access of routing and packet forwarding to well-behaving nodes and denying access from misbehaving nodes are critical for the proper functioning of a mobile ad-hoc network where cooperation among all networking nodes is usually assumed. However, the lack of a network infrastructure, the dynamics of the network topology and node membership, and the potential attacks from inside the network by malicious and/or noncooperative selfish nodes make the conventional network access control mechanisms not applicable. We present URSA, a ubiquitous and robust access control solution for mobile ad hoc networks. URSA implements ticket certification services through multiple-node consensus and fully localized instantiation. It uses tickets to identify and grant network access to well-behaving nodes. In URSA, no single node monopolizes the access decision or is completely trusted. Instead, multiple nodes jointly monitor a local node and certify/revoke its ticket. Furthermore, URSA ticket certification services are fully localized into each node's neighborhood to ensure service ubiquity and resilience. Through analysis, simulations, and experiments, we show that our design effectively enforces access control in the highly dynamic, mobile ad hoc network.
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paper_title: Secure ad hoc networks

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paper_title: Secure and Efficient Key Management in Mobile Ad Hoc Networks

paper_content:

In mobile ad hoc networks, due to unreliable wireless media, host mobility and lack of infrastructure, providing secure communications is a big challenge in this unique network environment. Usually cryptography techniques are used for secure communications in wired and wireless networks. The asymmetric cryptography is widely used because of its versatileness (authentication, integrity, and confidentiality) and simplicity for key distribution. However, this approach relies on a centralized framework of public key infrastructure (PKI). The symmetric approach has computation efficiency, yet it suffers from potential attacks on key agreement or key distribution. In fact, any cryptographic means is ineffective if the key management is weak. Key management is a central aspect for security in mobile ad hoc networks. In mobile ad hoc networks, the computational load and complexity for key management is strongly subject to restriction of the node's available resources and the dynamic nature of network topology. In this paper, we propose a secure and efficient key management framework (SEKM) for mobile ad hoc networks. SEKM builds PKI by applying a secret sharing scheme and an underlying multicast server group. In SEKM, the server group creates a view of the certification authority (CA) and provides certificate update service for all nodes, including the servers themselves. A ticket scheme is introduced for efficient certificate service. In addition, an efficient server group updating scheme is proposed.
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paper_title: An efficient group key management scheme for mobile ad hoc networks

paper_content:

Group key management is one of the basic building blocks in collaborative and group-oriented applications in Mobile AdHoc Networks (MANETs). Group key establishment involves creating and distributing a common secret for all group members. However, key management for a large and dynamic group is a difficult problem because of scalability and security. Modification of membership requires the group key to be refreshed to ensure backward and forward secrecy. In this paper, we propose a Simple and Efficient Group Key (SEGK) management scheme for MANETs. Group members compute the group key in a distributed manner.
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Title: A Review on Key Management Schemes in MANET
Section 1: Introduction
Description 1: Provide an overview of the importance of key management schemes in MANETs, discussing various cryptographic methods and their unique challenges due to the dynamic and resource-constrained nature of MANETs.

Section 2: Symmetric Key Management Schemes in MANET
Description 2: Discuss different symmetric key management schemes such as Distributed Key Pre-distribution Scheme (DKPS) and Peer Intermediaries for Key Establishment (PIKE), including their phases, features, and efficiencies.

Section 3: Asymmetric Key Management Schemes in MANET
Description 3: Outline several asymmetric key management schemes, including Secure Routing Protocol (SRP), Ubiquitous and Robust Access Control (URSA), Mobile Certificate Authority (MOCA), and others, explaining how they operate and their benefits and limitations.

Section 4: Group Key Management Schemes in MANET
Description 4: Detail methods for managing group keys, focusing on schemes like Simple and Efficient Group Key Management (SEGK), and explain their approaches for maintaining security in group communications.

Section 5: Hybrid or Composite Key Management Schemes in MANET
Description 5: Describe schemes that combine elements of symmetric and asymmetric key management, like the Zone-Based Key Management Scheme, detailing how they use hybrid approaches to improve overall security and efficiency.

Section 6: Conclusion & Future Work
Description 6: Summarize the different key management schemes discussed, highlighting the strengths and weaknesses of each. Suggest areas for future research to develop new or improved key management schemes.