DETECTING SPAM EMAIL USING MULTIPLE SPAM CLASSIFIERS
First Claim
1. A method of detecting whether a first e-mail is undesirable, the method comprising:
- inputting the first e-mail to each of a plurality of constituent spam classifiers;
obtaining at least one score from each of the plurality of constituent spam classifiers indicating the degree to which the first e-mail is deemed spam;
obtaining a combined spam score from a combined spam classifier that takes as input the at least one score from the plurality of constituent spam classifiers, the combined spam classifier being computed automatically in accordance with a false-positive vs. false-negative tradeoff; and
identifying the first e-mail as an undesirable e-mail if the combined spam score indicates that the first e-mail is undesirable.
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Abstract
A method for detecting undesirable emails combines input from two or more spam classifiers to provide improved classification effectiveness and robustness. The method includes obtaining a score from each of a plurality of constituent spam classifiers by applying them to a given input email. The method further includes obtaining a combined spam score from a combined spam classifier that takes as input the plurality of constituent spam classifier scores, the combined spam classifier being computed automatically in accordance with a specified false-positive vs. false-negative tradeoff. The method further includes identifying the given input email as an undesirable email if the combined spam score indicates that the input e-mail is undesirable.
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Citations
23 Claims
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1. A method of detecting whether a first e-mail is undesirable, the method comprising:
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inputting the first e-mail to each of a plurality of constituent spam classifiers; obtaining at least one score from each of the plurality of constituent spam classifiers indicating the degree to which the first e-mail is deemed spam; obtaining a combined spam score from a combined spam classifier that takes as input the at least one score from the plurality of constituent spam classifiers, the combined spam classifier being computed automatically in accordance with a false-positive vs. false-negative tradeoff; and identifying the first e-mail as an undesirable e-mail if the combined spam score indicates that the first e-mail is undesirable. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of detecting whether a first e-mail is undesirable, the method comprising the steps of:
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inputting the first e-mail to a classifier; obtaining from the classifier a classification of the first e-mail, wherein a range of classifications includes a first classification indicating that the first e-mail cannot be classified as either spam or non-spam; and taking an action if the first e-mail is classified under the first classification. - View Dependent Claims (19, 20)
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21. A method for detecting undesirable e-mail, the method comprising:
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inputting a first e-mail to each of a plurality of constituent spam classifiers; obtaining at least one score from each of the plurality of constituent spam classifiers indicating the degree to which the first e-mail is deemed spam; obtaining a combined spam score from a combined spam classifier that takes as input the at least one score from each of the plurality of constituent spam classifiers, at least one of the plurality of constituent spam classifiers being a member of a similarity-detection family; and identifying the first e-mail as an undesirable e-mail if the combined spam score indicates that the first e-mail is undesirable.
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22. A computer readable medium including computer instructions for detecting whether a first e-mail is undesirable, the computer instructions including instructions for:
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inputting the first e-mail to each of a plurality of constituent spam classifiers; obtaining at least one score from each of the plurality of constituent spam classifiers indicating the degree to which the first e-mail is deemed spam; obtaining a combined spam score from a combined spam classifier that takes as input the at least one score from the plurality of constituent spam classifiers, the combined spam classifier being computed automatically in accordance with a false-positive vs. false-negative tradeoff; and identifying the first e-mail as an undesirable e-mail if the combined spam score indicates that the first e-mail is undesirable.
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23. An information processing system for detecting whether a first e-mail is undesirable, comprising:
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a processor configured for;
inputting the first e-mail to each of a plurality of constituent spam classifiers;obtaining at least one score from each of the plurality of constituent spam classifiers indicating the degree to which the first e-mail is deemed spam; obtaining a combined spam score from a combined spam classifier that takes as input the at least one score from the plurality of constituent spam classifiers, the combined spam classifier being computed automatically in accordance with a false-positive vs. false-negative tradeoff; and identifying the first e-mail as an undesirable e-mail if the combined spam score indicates that the first e-mail is undesirable.
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Specification