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455/466; 709/206; 455/412.1
Field of Classification Search 455/466,
455/412.1; 709/206 See application file for complete search history.
U.S. PATENT DOCUMENTS
FOREIGN PATENT DOCUMENTS
EP 1 377 892 Bl 9/2004
Spam Assassin 2.64, Aug. 2004, 4 sheets. Webpage [online] [retrieved on Sep. 7, 2004]. Retrieved from the internet:: <URL:http://www.spamassasin.apache.org.html>.
Primary Examiner—Vincent P Harper Assistant Examiner—Marisol Figueroa (74) Attorney, Agent, or Firm—Okamoto & Benedicto LLP
In one embodiment, a content filtering system includes a feature list and a learning model. The feature list may be a subset of a dictionary that was used to train the content filtering system to identify classification (e.g., spam, phishing, porn, legitimate text messages, etc.) of text messages during a training stage. The learning model may include representative vectors, each of which represents a particular class of text messages. The learning model and the feature list may be generated in a server computer during the training stage and then subsequently provided to the mobile phone. An incoming text message in the mobile phone may be parsed for occurrences of feature words included in the feature list and then converted to an input vector. The input vector may be compared to the learning model to determine the classification of the incoming text message.
16 Claims, 3 Drawing Sheets
U.S. PATENT DOCUMENTS
2006/0259543 Al * 11/2006 Tindall 709/203
2007/0233463 Al * 10/2007 Sparre 704/10
FOREIGN PATENT DOCUMENTS WO WO 02/084459 Al 10/2002
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Steve Ramsay's Guide to Regular Expressions, Electronic Lext Center, University of Virginia, 12 sheets [retrieved on Sep. 2, 2004]. Retreived from the internet: <URL:http://www.etext.lib.virginia. edu/helpsheets/regex .html>.
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* cited by examiner