CRAFT: a new secure congestion control architecture

Congestion control algorithms seek to optimally utilize network resources by allocating a certain rate for each user. However, malicious clients can disregard the congestion control algorithms implemented at the clients and induce congestion at bottleneck links. Thus, in an adversarial environment, the network must enforce the congestion control algorithm in order to attain the optimal network utilization offered by the algorithm. Prior work protects only a single link incident on the enforcement router, neglecting damage inflicted upon other downstream links. We present CRAFT, a capability-based scheme to secure all downstream links of a deploying router. Our basic approach is to enforce a network-wide congestion control algorithm on all flows. As a reference design, we develop techniques to enforce the TCP congestion control. Our design regulates all flows to share bandwidth resources in a TCP-fair manner by emulating the TCP state machine in a CRAFT router. As a result, once a flow...

• Type: Conference
• Year: 2010
• Where: CCS
• Authors: Dongho Kim, Jerry T. Chiang, Yih-Chun Hu, Adrian Perrig, P. R. Kumar
• Keywords: Algorithm, CCS 2010, Congestion Control, Downstream Links, Security Privacy