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website defacement
Website defacement is an attack on a website that changes the visual appearance of the site or a webpage. These are typically the work of system crackers, who break into a web server and replace the hosted website with one of their own. Defacement is generally meant as a kind of electronic graffiti and, as other forms of vandalism, is also used to spread messages by politically motivated "cyber protesters" or hacktivists.
== Common methods ==
The most common method of defacement is using SQL injections which allows gaining administrative access. Another method of defacement is through FTP once the username and password are obtained.
Defacements usually consist of an entire page. This page usually includes the defacer's pseudonym or "Hacking Codename." Sometimes, the Website Defacer makes fun of the system administrator for failing to maintain server security. Most times, the defacement is harmless and is only done to show off a system cracker's skills or for Hacktivism; however it can sometimes be used as a distraction to cover up more sinister actions such as uploading malware or deleting essential files from the server.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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