Geodesic
Federating Digital Contact Tracing using Structured Overlay Networks
Computer Science and Information Systems, Tome 19 (2022) no. 3.

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In this paper, we present a comprehensive, yet simple, extension to the existing systems used for Digital Contact Tracing in Covid-19 pandemic. The ex-tension, called BubbleAntiCovid19 (BAC19), enables those systems, regardless of their underlying protocol, to enhance their sets of traced contacts and to improve the global fight against pandemic during the phase of opening borders and enabling more traveling. BAC19 is a Structured Overlay Network. Its protocol is inspired by the Chord and Synapse Structured Overlay Networks. We design the architecture of the Overlay Network Federation. We show that the federation can be used as a formal model of Forward Contact Tracing. BAC19 provides a fully exhaustive re-trieving procedure thanks to avoiding search during peer churn. Furthermore, we give simulation results for the BAC19 system, the simulator written in Python.
Keywords: Covid-19, Digital Contact Tracing, Distributed Hash Tables, Structured Overlay Networks, Bluetooth, GPS 
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     author = {Silvia Ghilezan and Simona Ka\v{s}terovi\'c and Luigi Liquori and Bojan Marinkovi\'c and Zoran Ognjanovi\'c and Tamara Stefanovi\'c},
     title = {Federating {Digital} {Contact} {Tracing} using {Structured} {Overlay} {Networks}},
     journal = {Computer Science and Information Systems},
     publisher = {mathdoc},
     volume = {19},
     number = {3},
     year = {2022},
     url = {http://geodesic.mathdoc.fr/item/CSIS_2022_19_3_a8/}
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Silvia Ghilezan; Simona Kašterović; Luigi Liquori; Bojan Marinković; Zoran Ognjanović; Tamara Stefanović. Federating Digital Contact Tracing using Structured Overlay Networks. Computer Science and Information Systems, Tome 19 (2022) no. 3. http://geodesic.mathdoc.fr/item/CSIS_2022_19_3_a8/