System and method for identifying and blocking pornogarphic and other web content on the internet

摘要

A system and method are disclosed for identifying and blocking unacceptable web content, including pornographic web content. In a preferred embodiment, the system comprises a proxy server connected between a client and the Internet that checks a requested URL against a block list that may include URLs identified by a web spider. If the URL is not on the block list, the proxy server requests the web content. When the web content is received, the proxy server processes its text content and compares the processing results using a thresholder. If necessary, the proxy server then processes the image content of the retrieved web content to determine if it comprises skin tones and textures. Based on these processing results, the proxy server may either block the retrieved web content or permit user access to it. Also disclosed is a system and method for inserting advertisements into retrieved web content.