Method to detect spam over internet telephony (SPIT)
US8141152B1 · kind B1 · utility
37Cited by
0References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 18, 2007 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | Jan 17, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L51/212
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.