[转载]Efficient Directory Harvest Attacks and Countermeasures
原始出处：[url]http://ijns.nchu.edu.tw/contents/ijns-v5-n3/ijns-2007-v5-n3-p264-273.pdf[/url]信息来源：邪恶八进制信息安全团队（[url]www.eviloctal.com[/url]）
The goal of the DHA attacker is to identify valid e-mail addresses in a system, which addresses can be sold or used for spamming purposes.To achieve the goal the attacker tries numerous different addresses and selects valid addresses according to the response of the e-mail server. We elaborated a method for optimizing the wordlist size used by the attacker under limited resources.
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