Reducing distributed denial of service (DDoS) attacks using client puzzle mechanism

  • Authors

    • C. Vasan Sai Krishna
    • Y. Bhuvana
    • P. Pavan Kumar
    • R. Murugan
  • Distributed Denial of Service Attacks (DDoS), Client Puzzle Mechanism, Cryptographic Puzzles, Authentication.
  • In a typical DoS attack, the attacker tries to bring the server down. In this case, the attacker sends a lot of bogus queries to the server to consume its computing power and bandwidth. As the server’s bandwidth and computing power are always greater than attacker’s client machine, He seeks help from a group of connected computers. DDoS attack involves a lot of client machines which are hijacked by the attacker (together called as botnet). As the server handles all these requests sent by the attacker, all its resources get consumed and it cannot provide services. In this project, we are more concerned about reducing the computing power on the server side by giving the client a puzzle to solve. To prevent such attacks, we use client puzzle mechanism. In this mechanism, we introduce a client-side puzzle which demands the machine to perform tasks that require more resources (computation power). The client’s request is not directly sent to the server. Moreover, there will be an Intermediate Server to monitor all the requests that are being sent to the main server. Before the client’s request is sent to the server, it must solve a puzzle and send the answer. Intermediate Server is used to validate the answer and give access to the client or block the client from accessing the server.

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  • How to Cite

    Vasan Sai Krishna, C., Bhuvana, Y., Pavan Kumar, P., & Murugan, R. (2017). Reducing distributed denial of service (DDoS) attacks using client puzzle mechanism. International Journal of Engineering & Technology, 7(1.1), 230-233.