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研究传统的客户端难题方案,之后提出一种自适应客户端难题方案.该方案采用一种轻量级的协议交互方式来获取客户端和服务器双方的实时状态信息,并据此自适应地调整客户端难题的难度.为了评估该方案的适用性,结合传统和自适应两种客户端难题方案,在对等(P2P)网络中提出了一种抵御DoS攻击的自适应安全框架.理论分析和实验结果表明,甚至在高度恶意的网络环境中,自适应客户端难题方案都可以在不明显影响合法客户端性能的前提下有效地抵御各种DoS攻击.
The paper studies the traditional client-side solution and then proposes a solution to the problem of adaptive client-side.This solution uses a lightweight protocol interaction to obtain the real-time status information of both the client and the server and adaptively adjust In order to assess the applicability of this scheme, an adaptive security framework against DoS attack is proposed in the peer-to-peer (P2P) network by combining the traditional and adaptive client-side solutions. Theoretical analysis and Experimental results show that, even in highly hostile network environments, adaptive client-side solutions can effectively resist various DoS attacks without significantly affecting the performance of legitimate clients.