Blocking & Filtering

The majority of the US Supreme Court is Reno v. ACLU (June 26, 1997) decided to block and filter Internet software on free speech and the Internet. One of the hot topics of discussion. Many people have criticized the inclusion and inclusion of blockade software, but on the other hand I believe that blockade software should not be used at all in public institutions such as libraries and schools.

Libraries and Internet cafes (Question 18), which use filtering and blocking systems and software for blocking, filtering, content deletion provisions and policy evaluation, some participants complete communication services including wartime Internet access related services The state at the 840th Ministerial Conference held on May 28, 2003, and the declaration of adoption by the European Council Council see the freedom of communication on the Internet. However, be aware of library filtering issues. IFLA World Report 2010, August 2010, http: //www.ifla-world-report.org

Using filtering and blocking systems and software in schools, libraries, Internet cafes (Question 18) According to the International Library Association Association (IFLA), the use of filtering software in libraries is increasing worldwide. 62 countries using the library filtering software reported "to some extent" or "to some extent", 47 reports are "No" compared with 50 cases in 2007, 60 reports are "No" "Has become. No "According to IFLA, in 2007, announced a questionnaire on the 2010 World Report 904 With clear legal requirements, schools, libraries, Internet cafes need to use filtering and blocking systems or software.

In general, three filtering techniques are used to block access to Web sites through the network infrastructure: IP blocking, DNS filtering, and URL blocking using proxies. Filters can also be implemented using local computer software (client filter). Anyone with computer administrator level authority can manage such filters. Network-based filtering can be attributed to filtering errors. Excessive block and excessive block. For example, when searching for health related information, you can exclude useful information by using the same search keywords for porn related material. Most filtering software tends to block excessively, not allowing unwanted leaks by customers. Therefore, if you block too much, the user completely avoids the filtering method. If new information is updated online, insufficient blocking may occur.