Content Filtering
What is Content Filtering?
Content filtering is the technique whereby content is blocked or appropriate supported on analysis of its content, preferably than its source or other criteria. Content filtering is most wide utilize on the internet to filter email and web access.
Content filtering generally run by determines character strings that, if matched, suggest unsuitable content that is to be screened out. Content filtering and the products that extend this service can be separate into Web filtering, the screening of Web sites or pages, and e-mail filtering, the screening of e-mail for spam or other exceptionable content.
Content filtering is usually utilized by organisations such as offices and schools to forbid computer users from consider inappropriate web sites or content, or as a preventative security measure to prevent access of known malware hosts. Content filtering software is sometimes also used on home computers in order to restrict access to inappropriate websites for children utilize the computer. Such software is typically delineated as parental control software.
Filtering methods
Attachment
Bayesian
DNS Based filtering
Char
Content
Heuristic
HTML
Language
Mail header
Mailing List
Phrases
Proximity
Regular Expression.
URL
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