Spam filtering with probabilistic secure hashes
US7660865B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2004 |
| Grant date | Feb 9, 2010 |
| Priority date | — |
| Expiry date | Nov 28, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L63/123
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
Disclosed are signature-based systems and methods that facilitate spam detection and prevention at least in part by calculating hash values for an incoming message and then determining a probability that the hash values indicate spam. In particular, the signatures generated for each incoming message can be compared to a database of both spam and good signatures. A count of the number of matches can be divided by a denominator value. The denominator value can be an overall volume of messages sent to the system per signature for example. The denominator value can be discounted to account for different treatments and timing of incoming messages. Furthermore, secure hashes can be generated by combining portions of multiple hashing components. A secure hash can be made from a combination of multiple hashing components or multiple combinations thereof. The signature based system can also be integrated with machine learning systems to optimize spam prevention.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.