Abstract: This paper proposes a secure source specific multicast scheme based on multicast channel hopping. By changing the group address in the SSM channel at non-fixed periods, it prevents the malicious hosts from tracing and joining an SSM channel, receiving the traffic and initiating DoS attack against multicast routing infrastructure. The simulations show that it has good scalability and feasibility.

Key words: Source specific multicast; Channel hopping; Denial of service

摘要： 提出了一种基于组播频道跳变的安全特定源组播通信方案。通过以不定长周期改变特定源组播频道的组地址，解决了阻止恶意主机跟踪、加入特定源组播频道接收组播流量、对组播路由基础设施实施DoS 攻击等问题。仿真数据表明，该方案具有较好的可扩展性和易实施性。

关键词: 特定源组播；频道跳变；拒绝服务