PrivGait: An Energy Harvesting-based Privacy-Preserving User Identification System by Gait Analysis

Weitao Xu, Wanli Xue, Qi Lin, Guohao Lan, Xingyu Feng, Bo Wei, Chengwen Luo, Wei Li, Albert Y. Zomaya

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


Smart space has emerged as a new paradigm that combines sensing, communication, and artificial intelligence technologies to offer various customised services. A fundamental requirement of these services is person identification. Although a variety of person identification approaches have been proposed, they suffer from several limitations in practical applications such as low energy efficiency, accuracy degradation, and privacy issue. This paper proposes an energy harvesting based privacy-preserving gait recognition scheme for smart space which is named . In , we extract discriminative features from one-dimensional gait signal and design an attention-based long short term memory (LSTM) network to classify different people. Moreover, we leverage a novel Bloom filter-based privacy-preserving technique to address the privacy leakage problem. To demonstrate the feasibility of , we design a proof-of-concept prototype using off-the-shelf energy harvesting hardware. Extensive evaluation results show that the proposed scheme outperforms state-of-the-art by 6–10% and incurs low system cost while preserving user’s privacy.

Original languageEnglish
Number of pages12
JournalIEEE Internet of Things Journal
Early online date15 Jun 2021
Publication statusE-pub ahead of print - 15 Jun 2021


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