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)
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