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:
Jan. 15, 2013
Filed:
Jan. 30, 2007
Greg Wittel, St. Louis, MO (US);
Yanyan Yang, Sunnyvale, CA (US);
Scott Panzer, Sunnyvale, CA (US);
Steven Lewis, San Jose, CA (US);
Greg Wittel, St. Louis, MO (US);
Yanyan Yang, Sunnyvale, CA (US);
Scott Panzer, Sunnyvale, CA (US);
Steven Lewis, San Jose, CA (US);
Proofpoint, Inc., Sunnyvale, CA (US);
Abstract
A system and method are described for using different types of image fingerprints to detect spam. Specifically, one embodiment of the invention dynamically calculates both an image-specific signature (e.g., MD5 checksum) and a generic signature for each image and, if a specified number of images have the same generic signature but different image-specific signatures, then a feature is fired within a spam engine to indicate that the images are spam. By way of example, a computer-implemented method is described for detecting spam images within a stream of messages comprising: generating generic signatures and image-specific signatures for images within the stream of messages; determining if two or more images with matching generic signatures have different image-specific signatures; and updating a spam filtering engine to include the matching generic signatures if the number of images with matching generic signatures but different image-specific signatures reach a specified threshold value.