Abstract: The existing aeronautical ad hoc network key management scheme relies heavily on trusted centers or infrastructure, resulting in low key management efficiency and low key security. In order to realize the secure information communication between aircraft nodes in high-speed dynamic radio communication links in aviation ad hoc network scenarios, a key management scheme based on blockchain aeronautical ad hoc network is proposed. The proposed scheme can be ensured the security and flexibility of key management by using key cryptography technology and improved key agreement protocol for secure generation and distribution of key pairs. Meanwhile, the verification and addition of public key data, as well as automatic public key storage and revocation operations can be achieved through the smart contract of the blockchain, so as to improve the efficiency and fairness of key management. The performance evaluation results that the proposed scheme is superior to the traditional aeronautical ad hoc network key management scheme in terms of communication consumption and computing consumption.

Key words: aeronautical ad hoc network , key management, blockchain, distributed