BGP hijacking is a well known threat to the Internet
routing infrastructure. There has been considerable interest in
developing tools that detect prefix hijacking but such systems
usually identify a large number of events, many of them being due
to some benign BGP engineering practice or misconfiguration.
Ramachandran et al.  and later Hu et al.  also correlated
suspicious routing events with spam and claimed to have found
evidence of spammers temporarily stealing prefixes to send spam.
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