The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2013
Filed:
May. 31, 2006
Vipul Sharma, Sunnyvale, CA (US);
John Gardiner Myers, Santa Clara, CA (US);
Steve Lewis, San Jose, CA (US);
Vipul Sharma, Sunnyvale, CA (US);
John Gardiner Myers, Santa Clara, CA (US);
Steve Lewis, San Jose, CA (US);
Proofpoint, Inc., Sunnyvale, CA (US);
Abstract
A system and method for removing ineffective features from a spam feature set. In particular, in one embodiment of the invention, the an entropy value is calculated for the feature set based on the effectiveness of the feature set at differentiating between ham and spam. Features are then removed one at a time and the entropy is recalculated. Features which increase the overall entropy are removed and features which decrease the overall entropy are retained. In another embodiment of the invention, the value of certain type of time consuming features (e.g., rules) is determined based on both the information gain associated with the features and the time consumed implementing the features. Those features which have relatively low information gain and which consume a significant amount of time to implement are removed from the feature set.