Hash-based systems and methods for detecting and preventing transmission of unwanted e-mail
US8204945B2 · kind B2 · utility
17Cited by
725References
83Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 9, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Jan 17, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L51/212
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system (120) detects transmission of potentially unwanted e-mail messages. The system (120) may receive e-mail messages and generate hash values based on one or more portions of the e-mail messages. The system (120) may then determine whether the generated hash values match hash values associated with prior e-mail messages. The system (120) may determine that one of the e-mail messages is a potentially unwanted e-mail message when one or more of the generated hash values associated with the e-mail message match one or more of the hash values associated with the prior e-mail messages.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.