Certificateless key agreement method on basis of mobile Ad Hoc network

Abstract

The invention relates to a certificateless key agreement method on the basis of a mobile Ad Hoc network, which comprises the following steps of: 1, initializing a system network; 2, constructing a network main private key, i.e. selecting a (t-1)th-degree polynomial to exchange necessary information at each node, enabling random t nodes or more than t nodes to mutually cooperate to obtain the network main private key and simultaneously obtaining a network public key; 3, generating key pairs for the nodes by utilizing the main private key in the network; 4, carrying out secrete communication among the nodes by utilizing the generated keys so as to implement the encrypting and decrypting process. The certificateless key agreement method has no problems of certificate verification and key escrow when implementing key agreement; meanwhile, dangerous nodes can be detected; moreover, a recommended encrypting scheme can have fewer encrypting items on the premise of ensuring security and the calculated amount and the communication traffic are reduced, and thus, the certificateless key agreement method has good practicality and security.

Description

technical field [0001] The invention relates to a key management method in a mobile Ad Hoc network, in particular to the key negotiation problem between mobile nodes, and belongs to the field of network communication security. Background technique [0002] Mobile Ad Hoc Network (MANET) is a new self-organizing network structure that does not depend on any fixed infrastructure or special nodes. Each node in the network is mobile and has limited resources. The entire network is formed by the dynamic interconnection between mobile nodes, forming a dynamic network topology. Due to the self-organizing feature of the mobile Ad Hoc network, which supports dynamic topological connections and multi-hop communication between mobile nodes, the network has strong self-organization, robustness and ease of construction. Due to these characteristics of the mobile Ad Hoc network, this type of network has been favored more and more recently, and is widely used in special fields, such as th...

AI Technical Summary

Problems solved by technology

However, since the ID-PKC scheme introduces PKG, PKG knows the private keys of all nodes, which leads to the problem of key escrow and single point of failure

Once the PKG node is captured, the authenticity of the node identity and the confidentiality of the private key cannot be guaranteed, and the entire network will fail

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