Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: DPCrowd: Privacy-preserving and Communication-efficient Decentralized
  Statistical Estimation for Real-time Crowd-sourced Data   In Internet of Things (IoT) driven smart-world systems, real-time
crowd-sourced databases from multiple distributed servers can be aggregated to
extract dynamic statistics from a larger population, thus providing more
reliable knowledge for our society. Particularly, multiple distributed servers
in a decentralized network can realize real-time collaborative statistical
estimation by disseminating statistics from their separate databases. Despite
no raw data sharing, the real-time statistics could still expose the data
privacy of crowd-sourcing participants. For mitigating the privacy concern,
while traditional differential privacy (DP) mechanism can be simply implemented
to perturb the statistics in each timestamp and independently for each
dimension, this may suffer a great utility loss from the real-time and
multi-dimensional crowd-sourced data. Also, the real-time broadcasting would
bring significant overheads in the whole network. To tackle the issues, we
propose a novel privacy-preserving and communication-efficient decentralized
statistical estimation algorithm (DPCrowd), which only requires intermittently
sharing the DP protected parameters with one-hop neighbors by exploiting the
temporal correlations in real-time crowd-sourced data. Then, with further
consideration of spatial correlations, we develop an enhanced algorithm,
DPCrowd+, to deal with multi-dimensional infinite crowd-data streams. Extensive
experiments on several datasets demonstrate that our proposed schemes DPCrowd
and DPCrowd+ can significantly outperform existing schemes in providing
accurate and consensus estimation with rigorous privacy protection and great
communication efficiency.

17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
20
The categories of this paper are: acc-phys
14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
13
The categories of this paper are: quant-ph
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga