The apps for contact tracking and alert in response to the coronavirus pandemic are doing a lot of discussion, due to some aspects related to data protection, privacy, security and effectiveness of digital solutions to face the crisis .
Apple and Google are working on their proposal that should arrive shortly, with the aim of making possible the use of Bluetooth technology to help governments and health authorities to contain the infections, promising "full respect for the security and privacy of users".
Ludovic Le Moan, head of Sigfox (a telecommunication network dedicated to the Internet of Things), offers an alternative: the bracelet connected to a low speed network. Obviously Le Moan has every interest in proposing his solution, but the interesting idea and makes it possible to create a bracelet using modulation Ultra-Narrow Band (UNB), an economic and networked approach that can operate on sub-GHz frequencies, on the IS bands (868MHz in Europe / ETSI and 902MHz in the USA / FCC).
Long-range communications are possible, without the need to negotiate connection parameters between the device and a receiving base station and the connection parameter negotiation mechanism could be used to allow tracking of people's position, without sending data dedicated servers and alerting people who have been close to an infected person for a specified period of time to test or self-sleep, without revealing the identity of the infected person.
"We know that part of the population does not have a smartphone and that some other device may be needed," acknowledged Ric Bothorel, a French politician involved in the development of the tracking app which in France is called "StopCovid". The manager in charge of Sigfox ensures that the data collected from his bracelets will only be provided to the health authorities and that once the bracelet has been removed, all data can be deleted. A bracelet of this type already provided in South Korea and Hong Kong for travelers from abroad. Even for the elderly in Italy who do not have, do not know or cannot use a mobile phone, a device of this type could be interesting.
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