Referrer cache chain
US8473611B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 4, 2009 |
| Grant date | Jun 25, 2013 |
| Priority date | — |
| Expiry date | Feb 15, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/9574
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A request for content is received at a content filter of a computer system, and a determination is made, based on a referrer included in the request, regarding a root site directly or indirectly associated with the request. Thereafter, the content is permitted or not permitted according to whether or not the root site is a permitted site and a site associated with the content is categorized in a semantically equivalent content category with the root site. The determination regarding the root site may involve consulting a referrer chain cache storing lists of referrers which associate referring Web sites with root sites from which referrals originate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.