text: Minor corrections

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2021-10-19 03:43:57 +02:00
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In Section~\ref{sec:thething}, we introduced the notion of {\thething} events in privacy-preserving time series publishing.
The differentiation among regular and {\thething} events stipulates a privacy budget allocation that deviates from the application of existing differential privacy protection levels.
Based on this novel event categorization, we designed three models (Section~\ref{subsec:lmdk-mechs}) that achieve {\thething} privacy.
For this, we assumed that the timestamps in the {\thething} set $L$ are not privacy sensitive, and therefore we used them in our models as they were.
For this, we assumed that the timestamps in the {\thething} set $L$ are not privacy-sensitive, and therefore we used them in our models as they were.
This may pose a direct or indirect privacy threat to the data generators (users).
For the former, we consider the case where we desire to publish $L$ as complimentary information to the release of the event values.

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For this procedure, we allocate a small fraction of the available privacy budget, i.e.,~$1$\% or even less (see Section~\ref{subsec:sel-eps} for more details).
\paragraph{Score function}
Prior to selecting a set, the exponential mechanism evaluates each set using a score function.
\paragraph{Utility score function}
Prior to selecting a set, the exponential mechanism evaluates each set using a utility score function.
One way evaluate each set is by taking into account the temporal position the events in the sequence.
% Nearby events