A group of smart spaces are connected only by a space between them such as a hallway or square.
Discuss the factors that determine whether that intervening space can act as a mix zone
What will be an ideal response?
A mix zone is an area in which users do not access location-aware services (i.e., do not give up an identifier
correlated to a location). The idea is that users change their (pseudonymous) identifiers in the mix zone, and
the mix zone acts to prevent correlations between the identifiers used by a particular individual.
To serve as a mix zone, there needs to be sufficiently many travelling through it at any given time. Moreover,
it should be impossible to make an inference based on distances and likely speeds of travel. If, for example,
two spaces are known to be close to one another, then an absence of an identifier in one correlated with a new
presence in another shortly after may provide evidence that those two identifiers belong to the same person.
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What will be an ideal response?
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