This paper presents PRESTO, a novel two-tier sensor data management architecture comprising proxies and sensors that cooperate with one another for acquiring data and processing queries. PRESTO proxies construct time-series models of observed trends in ...

Spam, by overwhelming inboxes, has made email a less reliable medium than it was just a few years ago. Spam filters are undeniably useful but unfortunately can flag nonspam as spam. To restore email's reliability, a recent spam control approach grants ...

In order for overlays and new network architectures to gain real user acceptance, users should be able to leverage overlay functionality without any modifications to their applications and operating systems. We present our design, implementation, and ...

In this paper, we present the design, implementation, and evaluation of a novel endpoint congestion control system that achieves near-optimal performance in all likely circumstances. Our approach, called the Probe Control Protocol (PCP), emulates ...

Global anycast, an important building block for many distributed services, faces several challenging requirements. First, anycast response must be fast and accurate. Second, the anycast system must minimize probing to reduce the risk of abuse ...

Bugs in distributed systems are often hard to find. Many bugs reflect discrepancies between a system's behavior and the programmer's assumptions about that behavior. We present Pip, an infrastructure for comparing actual behavior and expected behavior ...

Internet traffic destined for unused or unreachable addresses provides critically important information on malicious and misconfigured activity. Since Internet address allocation and policy information is distributed across many devices, applications, ...

Scalable distribution of large files has been the area of much research and commercial interest in the past few years. In this paper, we describe the CoBlitz system, which efficiently distributes large files using a content distribution network (CDN) ...

In this paper, we describe Credence, a decentralized object reputation and ranking system for large-scale peer-to-peer filesharing networks. Credence counteracts pollution in these networks by allowing honest peers to assess the authenticity of online ...