Proceedings of the 2001 conference on Applications, technologies, architectures, and protocols for computer communications
Using signal processing to analyze wireless data traffic
WiSE '02 Proceedings of the 1st ACM workshop on Wireless security
Passive estimation of TCP round-trip times
ACM SIGCOMM Computer Communication Review
On the characteristics and origins of internet flow rates
Proceedings of the 2002 conference on Applications, technologies, architectures, and protocols for computer communications
Gigascope: a stream database for network applications
Proceedings of the 2003 ACM SIGMOD international conference on Management of data
Variability in TCP round-trip times
Proceedings of the 3rd ACM SIGCOMM conference on Internet measurement
Estimating loss rates with TCP
ACM SIGMETRICS Performance Evaluation Review
Proceedings of the 4th ACM SIGCOMM conference on Internet measurement
ATEC '06 Proceedings of the annual conference on USENIX '06 Annual Technical Conference
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IP networks are increasingly carrying mission-critical applications with robust end-to-end network performance and reliability requirements. Network performance monitoring forms an essential component of critical IP network management functions such as troubleshooting, anomaly detection, and Service-Level-Agreement (SLA) compliance monitoring. However, privacy and security considerations are fueling the use of IP-level encryption techniques such as IPsec, which obscure important transport layer features that existing performance measurement techniques need. New techniques are therefore needed for monitoring performance of encrypted traffic. Towards this goal, in this paper we present a new technique for monitoring round-trip times (RTT) for IP-level encrypted communications. Our approach involves using network-level features like packet size and inter-packet timing to infer specific timing events, and aggregating measurements across short time intervals and related connections to derive final RTT estimates for network paths of interest. Extensive evaluations using traces from an énterprise and a broadband access network, demonstrate that the resulting RTT estimates are quite accurate.