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2022 IEEE Global Communications Conference, GLOBECOM 2022 ; : 5510-5515, 2022.
Article in English | Scopus | ID: covidwho-2228774


Digital Contact Tracing (DCT) has been proposed to limit the spread of COVID-19, allowing for targeted quarantine of close contacts. The protocol is designed to be lightweight, broad-casting limited-time tokens over Bluetooth Low Energy (BLE) beacons, allowing receivers to record contacts pseudonymously. However, currently proposed protocols have vulnerabilities that permit an adversary to perform massive surveillance or cause significant numbers of false-positive alerts. In this paper, we present AcousticMask, which encrypts broadcast messages using a key derived from the audio signal present at each device with sufficient security levels. Our results show that a receiver sharing the same social space as a sender will hear all of the sender's ephemeral IDs (EphIDs) with Hamming distance at most 3, which can be decrypted at the rate of 10 Hz on a Raspberry Pi 4, while achieving a security factor of over 2108against attackers in our testing set, showing AcousticMask is lightweight for DCT and provides sufficient security levels to protect user's privacy. © 2022 IEEE.

18th ACM Conference on Emerging Networking Experiment and Technologies, CoNEXT 2022 ; : 349-368, 2022.
Article in English | Scopus | ID: covidwho-2194085
Tourism Review ; 2022.
Article in English | Scopus | ID: covidwho-1909174
Ieee Access ; 10:59782-59791, 2022.
Article in English | Web of Science | ID: covidwho-1895882
Tourism Review ; 2022.
Article in English | Scopus | ID: covidwho-1713957
European Review for Medical and Pharmacological Sciences ; 25(23):7585-7597, 2021.
Article in English | Web of Science | ID: covidwho-1576100
Studies in Systems, Decision and Control ; 382:23-45, 2022.
Article in English | Scopus | ID: covidwho-1391726
SenSys - Proc. ACM Conf. Embedded Networked Sens. Syst. ; : 770-771, 2020.
Article in English | Scopus | ID: covidwho-991891
Epidemiol Infect ; 148: e141, 2020 07 06.
Article in English | MEDLINE | ID: covidwho-633492


The pandemic of coronavirus disease 2019 (COVID-19) has posed serious challenges. It is vitally important to further clarify the epidemiological characteristics of the COVID-19 outbreak for future study and prevention and control measures. Epidemiological characteristics and spatial-temporal analysis were performed based on COVID-19 cases from 21 January 2020 to 1 March 2020 in Shandong Province, and close contacts were traced to construct transmission chains. A total of 758 laboratory-confirmed cases were reported in Shandong. The sex ratio was 1.27: 1 (M: F) and the median age was 42 (interquartile range: 32-55). The high-risk clusters were identified in the central, eastern and southern regions of Shandong from 25 January 2020 to 10 February 2020. We rebuilt 54 transmission chains involving 209 cases, of which 52.2% were family clusters, and three widespread infection chains were elaborated, occurring in Jining, Zaozhuang and Liaocheng, respectively. The geographical and temporal disparity may alert public health agencies to implement specific measures in regions with different risk, and should attach importance on how to avoid household and community transmission.

Coronavirus Infections/epidemiology , Coronavirus Infections/transmission , Pneumonia, Viral/epidemiology , Pneumonia, Viral/transmission , Adult , COVID-19 , China/epidemiology , Contact Tracing , Female , Geographic Information Systems , Humans , Male , Middle Aged , Pandemics , Time Factors