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What is a commonly used method used to sanitize HTML application input?
HTML erases all entries between symbols
HTML converts all code to uppercase
HTML entity encoding and URL Encoding
HTML attaches randomly generated alphanumeric characters for the first 3 digits or letters
HTML entity encoding serves the need for encoding literal representations of certain meta-characters to their corresponding character entity references. A common example of HTML entity encoding is where "<" is encoded as < and ">" encoded as >. URL encoding applies to parameters and their associated values that are transmitted as part of HTTP query strings. Likewise, characters that are not permitted in URLs are represented using their Unicode Character Set. For example, "<" is URL-encoded as "%3C" and "ÿ" is URL-encoded as "%C3%BF". It has become a common place for attackers to try and exploit inherent weaknesses in encoding and decoding routines. http://projects.webappsec.org/w/page/13246933/Improper%20Input%20Handling
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