IEEE Consumer Electronics Magazine - July 2018 - 80

[Figure 7(c)]. When the customer decides to modify the coverage [Figure 7(d)], a transaction is made toward the smart
contract address by invoking the changeState() function.
Details such as transaction hash, block number, block hash,
used gas, and information about the specific modification performed are shown in the mobile app [Figure 7(e)]. Coverage
can also be automatically modified by exploiting the GPS sensor of the electronic device. To this purpose, the customer can
schedule coverage modification and specify the area where
the coverage (e.g., a theft cover) should be automatically activated/deactivated [Figure 7(f)]. In case of theft (especially if a

When the customer clicks on "passengers' covers," he or she
can add or remove passengers [Figure 7(b)]. At this stage, the
electronic device checks whether the number of passengers
indicated by the customer corresponds to the number of passengers onboard (as detected by the electronic device) and
modifies the coverage by specifying the highest value between
inserted/detected ones.
For each coverage, the customer can get additional information, e.g., about the amount of time the coverage has been
active, the date and time of the last modification, and the total
amount of Ethers saved while the coverage was not active

(a)

(b)

(c)

(d)

(e)

(f)

FigUre 7. Screenshots of the prototype app: (a) the main window, (b) the passenger's coverage modification, (c) fire coverage details,
(d) deactivation of the fire coverage, (e) details on the executed transaction, and (f) a selection of areas for automatic coverage change.
80 IEEE Consumer Electronics Magazine

^

july 2018



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