Are we collaborative yet? A Usability Perspective on Mixnet Latency for Real-Time Applications
🤖 AI Summary
This study addresses the lack of empirical analysis on the usability of real-time collaborative applications over mixnets with moderate latency, a gap that hinders the balance between anonymity and user experience. The authors present the first controlled user study in this context, implementing a text-based collaborative quiz system augmented with a tunable delay injection mechanism to simulate average latencies ranging from 1 to 10 seconds. By integrating virtual collaboration agents and quantitative evaluation metrics, they systematically measure user tolerance under varying delays. Findings reveal that usability remains acceptable at 1- and 4-second delays, degrades significantly at 7 seconds, and is severely impaired at 10 seconds. This work fills a critical gap in understanding the trade-off between latency and usability in real-time anonymous communication, offering concrete latency thresholds to guide mixnet parameter configuration.
Application Category
📝 Abstract
Mixnet networks deliberately induce additional latency to communications to provide anonymity. Recent developments have allowed mixnets to reduce their latency from hours to seconds while maintaining the same level of anonymity. As a result, real-time communications are now possible on mixnets. There has been limited research on how users tolerate different levels of delay, and it is unclear what latency levels mixnet operators should choose. Previous studies about latency do not apply to these `mid-latency' mixnet scenarios. Our paper contributes the first measurement of users' tolerance to real-time applications under mixnet delay. We design a text-based collaborative quiz system to test user response to latency where participants complete a set of question tasks in collaboration with a simulated second user. Different levels of latency are added, analogous to a modern mixnet system. We show that average delay parameters of 1s and 4s maintain usability, a mean delay of 7s shows some difficulty and a mean delay of 10s is detrimental to user experience.Using these delay parameters, mixnet operators can ensure that most types of real-time communication applications are usable. Mixnets thus can balance usability and anonymity without compromising either.
Problem
Research questions and friction points this paper is trying to address.
mixnet
latency
usability
real-time applications
user tolerance
Innovation
Methods, ideas, or system contributions that make the work stand out.
mixnet latency
user tolerance
real-time applications
usability study
anonymity-usability tradeoff
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