对分布式拒绝服务攻击的防护，传统的方法是采用路由访问控制列表过滤的防护方法，无法识别虚假地址和针对应用层的攻击，而且容易造成服务器无法向外部提供正常的服务。
The traditional detect method of adopting acl for DOS can not identify the attack aiming at the fake address and application layer, and easily made the server cannot apply the normal service for user.
针对认知无线电网络中出现的模仿主用户攻击和自私行为攻击问题，提出一种基于簇的分布式认知无线电网络安全体系结构。
To solve the primary user emulation attack and selfish misbehaviors in cognitive radio networks, this paper presents cluster-based security architecture for distributed cognitive radio networks.
针对分布式拒绝服务攻击的检测问题，提出基于模糊逻辑的动态的阈值检测方法。
To resolve the problem of detecting Distributed Denial of Service (DDoS) attacks, a dynamic threshold detection method based on fuzzy logic was proposed.
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