Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: RTbust: Exploiting Temporal Patterns for Botnet Detection on Twitter   Within OSNs, many of our supposedly online friends may instead be fake
accounts called social bots, part of large groups that purposely re-share
targeted content. Here, we study retweeting behaviors on Twitter, with the
ultimate goal of detecting retweeting social bots. We collect a dataset of 10M
retweets. We design a novel visualization that we leverage to highlight benign
and malicious patterns of retweeting activity. In this way, we uncover a
'normal' retweeting pattern that is peculiar of human-operated accounts, and 3
suspicious patterns related to bot activities. Then, we propose a bot detection
technique that stems from the previous exploration of retweeting behaviors. Our
technique, called Retweet-Buster (RTbust), leverages unsupervised feature
extraction and clustering. An LSTM autoencoder converts the retweet time series
into compact and informative latent feature vectors, which are then clustered
with a hierarchical density-based algorithm. Accounts belonging to large
clusters characterized by malicious retweeting patterns are labeled as bots.
RTbust obtains excellent detection results, with F1 = 0.87, whereas competitors
achieve F1 < 0.76. Finally, we apply RTbust to a large dataset of retweets,
uncovering 2 previously unknown active botnets with hundreds of accounts.

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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: patt-sol
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th
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The categories of this paper are: math
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The categories of this paper are: supr-con
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The categories of this paper are: mtrl-th
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The categories of this paper are: gr-qc