Lin Yuhing Hwang

US Patent:

8141152, Mar 20, 2012

Filed:

Dec 18, 2007

Appl. No.:

11/958729

Inventors:

Lin Yuh-Ing Hwang - Fremont CA, US
Leroy Lacy - Morgan Hill CA, US
Li Ling - Milpitas CA, US

Assignee:

Avaya Inc. - Basking Ridge NJ

International Classification:

G06F 11/00

US Classification:

726 22, 726 15, 726 23, 726 24, 726 25, 713150, 713187, 713188, 380243, 380247, 709206, 379 8808, 379 8822, 370242, 370351, 704246

Abstract:

The present invention provides methods, devices, and systems for detecting and filtering SPam over Internet Telephony (SPIT). The invention includes a two level filter. The first level may include a robust audio hash used to filter audio messages based on their audio content and the second level may include a near-duplicate pattern matching algorithm having a number of content filters and an evaluator to aggregate the results from the multiple content filters. By supporting multiple aggregation methods, a more flexible SPIT detection scheme is provided.