Patent Document ID: 9465789
Application ID: 13851199

Base Claim:
1. A method of detecting spam in web sites, the method comprising: obtaining a text entry; detecting a number of character transitions between character sets in the text entry, wherein the character sets (i) each correspond to different alphabets and (ii) are different subsets of a character encoding that maps characters from multiple alphabets to respective binary numbers for use by computers; calculating, with a computer, a score indicative of the likelihood that the text entry is spam based on the number of character transitions; and labeling the text entry as spam based on the score.

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Claim 3:
3. The method of claim 1 , wherein detecting a number of character transitions between character sets in the text entry further comprises: identifying a primary character set of characters in the text entry; selecting a record of misleading characters corresponding to the primary character set, wherein a misleading character in a non-primary character set is visually similar to a character in the primary character set; and weighting a count of the number of character transitions to or from characters in the record of misleading characters more than a count of the number of character transitions to or from characters that are not in the record of misleading characters.