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دسته بندی:
مدیریت ترافیک - traffic management
سال انتشار:
2017
عنوان انگلیسی مقاله:
Privacy-protected statistics publication over social media user trajectory streams
ترجمه فارسی عنوان مقاله:
آمار منتشر شده توسط محافظت از حریم خصوصی بر روی جریان مسیر کاربر رسانه اجتماعی
منبع:
Sciencedirect - Elsevier - Future Generation Computer Systems, Corrected proof. doi:10.1016/j.future.2017.08.002
نویسنده:
Shuo Wang a,*, Richard Sinnott a, Surya Nepal b
چکیده انگلیسی:
An increasing amount of user location information is being generated due to the widespread use of social
network applications and the ubiquitous adoption of mobile and wearable technologies. This data can
be analysed to identify precise trajectories of individuals — where they went and when they were there.
This is an obvious privacy issue, yet publication of real-time aggregate over such location streams can
provide valuable resources for researchers and government agencies, e.g., in case of pandemics it would
be very useful to identify who might have come into contact with an infected individual at a given time.
Differential privacy techniques have become popular and widely adopted to address privacy concerns.
However, there are three key issues that limit the application of existing differential privacy approaches
to user trajectory data: (a) the heterogeneous nature of the trajectories, (b) uniform sliding window
mechanisms do not meet individual privacy requirements and (c) limited privacy budgets and impact on
data utility when applied to infinite data streams. To tackle these problems, this paper proposes a private
real-time trajectory stream statistics publication mechanism utilizing differential privacy (DP-PSP). To
relieve the heterogeneity issues, anchor point discovery (e.g., fixed locations like museums, parks, etc.)
and road segmenting mechanisms are proposed. We provide an adaptive w-step sliding window approach
that allows users to specify their own dynamic privacy budget distribution to optimize their own privacy
budget. To preserve the data utility, we present multi-timestamp prediction models and private k-nearest
neighbour selection and perturbation algorithms to reduce the amount of perturbation distortion induced
through the differential privacy mechanism. Comprehensive experiments over real-life location-based
social network user trajectories show that DP-PSP provides private data aggregate over infinite trajectory
streams and boosts the utility and quality of the perturbed aggregation without compromising individual
privacy.
Keywords: Location privacy | Differential privacy | Social media | Multi-timestamp prediction | Stream aggregate publication
قیمت: رایگان
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