Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Call Me MayBe: Understanding Nature and Risks of Sharing Mobile Numbers
  on Online Social Networks   There is a great concern about the potential for people to leak private
information on OSNs, but few quantitative studies on this. This research
explores the activity of sharing mobile numbers on OSNs, via public profiles
and posts. We attempt to understand the characteristics and risks of mobile
numbers sharing behaviour on OSNs and focus on Indian mobile numbers. We
collected 76,347 unique mobile numbers posted by 85905 users on Twitter and
Facebook and analysed 2997 numbers, prefixed with +91. We observed, most users
shared their own mobile numbers to spread urgent information; and to market
products and escort business. Fewer female users shared mobile numbers on OSNs.
Users utilized other OSN platforms and third party applications like
Twitterfeed, to post mobile numbers on multiple OSNs. In contrast to the user's
perception of numbers spreading quickly on OSN, we observed that except for
emergency, most numbers did not diffuse deep. To assess risks associated with
mobile numbers exposed on OSNs, we used numbers to gain sensitive information
about their owners (e.g. name, Voter ID) by collating publicly available data
from OSNs, Truecaller, OCEAN. On using the numbers on WhatApp, we obtained a
myriad of sensitive details (relationship status, BBM pins) of the number
owner. We communicated the observed risks to the owners by calling. Few users
were surprised to know about the online presence of their number, while a few
others intentionally posted it online for business purposes. We observed, 38.3%
of users who were unaware of the online presence of their number have posted
their number themselves on the social network. With these observations, we
highlight that there is a need to monitor leakage of mobile numbers via profile
and public posts. To the best of our knowledge, this is the first exploratory
study to critically investigate the exposure of Indian mobile numbers on OSNs.

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The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
35
The categories of this paper are: mtrl-th
26
The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
36
The categories of this paper are: cmp-lg
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The categories of this paper are: hep-th
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The categories of this paper are: supr-con
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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph