The De-anonymization Method Based on User Spatio-Temporal Mobility Trace
Conference paper
First Online:
Abstract
Nowadays user mobility traces are more and more likely to de-anonymize users in addition to other types of data. Among them, model-based approaches usually provide more accurate de-anonymize than that of feature-locations-based approaches. More recently, Hidden Markov Model (HMM) based approaches are proposed to find out the mobility pattern of user mobility traces. However, in the key step of the hidden state definition, existing models rely on the fixed classification of time, space or number, which can hardly suit for all various users. In this paper, we propose a user de-anonymization method based on HMM. Different from current approaches, the method utilizes a novel density-based HMM, which uses the density-based clustering to obtain hidden states of HMM from three-dimensional (time, latitude and longitude) spatio-temporal data, and provide much better performance. Furthermore, we also propose a frequent spatio-temporal cube filter (FSTC-Filter) which significantly reduces the number of candidate models and thus improves the efficiency.
Keywords
De-anonymization Density-based HMM Frequent spatio-temporal cube Mobility traceNotes
Acknowledgement
This work is supported by the National Natural Science Foundation of China (No. U1636216, No. 61232005, No. 61402456)
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