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The purpose of this paper is to survey the key management protocols for wired and wireless networks and study their security aspects in terms of key generation, agreement and distribution. The central research challenge is exhaustive survey of secure and efficient key management protocols. In this paper, it is shown that all these protocols could be placed under one of two key management protocol categories: peer-to-peer communication and group communication. This can also be analyzed that peer-to-peer key management can be classified as: symmetric key, asymmetric key and hybrid key management protocols and group communication can further be classified as: Diffie-Hellman based Hybrid key management.
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