A Collaborative DDoS Defense Platform Based on Blockchain Technology

In this paper, we propose a consortium blockchainbased system sharing malicious IP to prevent further attacks happening among other hosts. In our scheme, every security operation center (SOC) serving as a blockchain-node uploads some suspicious IPs to find the potential attackers' IPs. A smart contract is responsible for comparing the loaded IPs and the existing ones without human interference. If IPs in different lists are matched with certain degree, this system will respond by giving the whole list of malicious IP. By means of these steps, shares of IP lists are achieved and attacks are prevented in advance. Besides, when uploading and sharing, we utilize elliptic curve cryptography to ensure data confidentiality and integrity.