Eliminating periodic packet losses in the 4.3-Tahoe BSD TCP congestion control algorithm
ACM SIGCOMM Computer Communication Review
TCP Vegas: new techniques for congestion detection and avoidance
SIGCOMM '94 Proceedings of the conference on Communications architectures, protocols and applications
SIGCOMM '94 Proceedings of the conference on Communications architectures, protocols and applications
Congestion control and traffic management in ATM networks: recent advances and a survey
Computer Networks and ISDN Systems
TCP congestion control with a misbehaving receiver
ACM SIGCOMM Computer Communication Review
Proceedings of the First International Workshop on Information Hiding
Scalability and accuracy in a large-scale network emulator
ACM SIGOPS Operating Systems Review - OSDI '02: Proceedings of the 5th symposium on Operating systems design and implementation
The predecessor attack: An analysis of a threat to anonymous communications systems
ACM Transactions on Information and System Security (TISSEC)
Low-Cost Traffic Analysis of Tor
SP '05 Proceedings of the 2005 IEEE Symposium on Security and Privacy
Misbehaving TCP receivers can cause internet-wide congestion collapse
Proceedings of the 12th ACM conference on Computer and communications security
SP '06 Proceedings of the 2006 IEEE Symposium on Security and Privacy
Tor: the second-generation onion router
SSYM'04 Proceedings of the 13th conference on USENIX Security Symposium - Volume 13
Low-resource routing attacks against tor
Proceedings of the 2007 ACM workshop on Privacy in electronic society
How much anonymity does network latency leak?
Proceedings of the 14th ACM conference on Computer and communications security
High speed bulk data transfer using the SSH protocol
Proceedings of the 15th ACM Mardi Gras conference: From lightweight mash-ups to lambda grids: Understanding the spectrum of distributed computing requirements, applications, tools, infrastructures, interoperability, and the incremental adoption of key capabilities
Shining Light in Dark Places: Understanding the Tor Network
PETS '08 Proceedings of the 8th international symposium on Privacy Enhancing Technologies
Sampled traffic analysis by internet-exchange-level adversaries
PET'07 Proceedings of the 7th international conference on Privacy enhancing technologies
A practical congestion attack on tor using long paths
SSYM'09 Proceedings of the 18th conference on USENIX security symposium
Improving tor using a TCP-over-DTLS tunnel
SSYM'09 Proceedings of the 18th conference on USENIX security symposium
Recruiting new tor relays with BRAIDS
Proceedings of the 17th ACM conference on Computer and communications security
An improved algorithm for tor circuit scheduling
Proceedings of the 17th ACM conference on Computer and communications security
Timing analysis in low-latency mix networks: attacks and defenses
ESORICS'06 Proceedings of the 11th European conference on Research in Computer Security
FC'10 Proceedings of the 14th international conference on Financial Cryptography and Data Security
ExperimenTor: a testbed for safe and realistic tor experimentation
CSET'11 Proceedings of the 4th conference on Cyber security experimentation and test
Throttling Tor bandwidth parasites
Security'12 Proceedings of the 21st USENIX conference on Security symposium
Enhancing Tor's performance using real-time traffic classification
Proceedings of the 2012 ACM conference on Computer and communications security
How (not) to build a transport layer for anonymity overlays
ACM SIGMETRICS Performance Evaluation Review
PCTCP: per-circuit TCP-over-IPsec transport for anonymous communication overlay networks
Proceedings of the 2013 ACM SIGSAC conference on Computer & communications security
Please slow down!: the impact on tor performance from mobility
Proceedings of the Third ACM workshop on Security and privacy in smartphones & mobile devices
Improved website fingerprinting on Tor
Proceedings of the 12th ACM workshop on Workshop on privacy in the electronic society
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Tor is one of the most widely used privacy enhancing technologies for achieving online anonymity and resisting censorship. While conventional wisdom dictates that the level of anonymity offered by Tor increases as its user base grows, the most significant obstacle to Tor adoption continues to be its slow performance. We seek to enhance Tor's performance by offering techniques to control congestion and improve flow control, thereby reducing unnecessary delays. To reduce congestion, we first evaluate small fixed-size circuit windows and a dynamic circuit window that adaptively re-sizes in response to perceived congestion. While these solutions improve web page response times and require modification only to exit routers, they generally offer poor flow control and slower downloads relative to Tor's current design. To improve flow control while reducing congestion, we implement N23, an ATM-style per-link algorithm that allows Tor routers to explicitly cap their queue lengths and signal congestion via back-pressure. Our results show that N23 offers better congestion and flow control, resulting in improved web page response times and faster page loads compared to Tor's current design and other window-based approaches. We also argue that our proposals do not enable any new attacks on Tor users' privacy