Masato Minda

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In recent years, many spam mails intending for ``One-click fraud" or ``Phishing" have been sent to many unspecified e-mail users. As one anti-spam technology, URL Blacklist based on the URLs in the spam mails is well used. However, spammers have been avoiding this technique by getting many new domains, using them only in a few spam mails, and throwing them(More)
Recently, many spam mails associated with “One-click fraud,” “Phishing,” and so on have been sent to unspecified large number of e-mail users. According to some previous works, most spam mails contained some URLs whose domains were registered relatively recently, such that the age of the domain used in the URL in the messages would be a good criterion for(More)
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