ALSO CALLED: Day-zero Threats, Zero Day Threats, Internet Threats, Security Breaches, Virus Threats, Day Zero Threats, Computer Security Threats, Network Security Threats, Threat Mitigation, Network-level Threats, Network Threats, Network Level Threats, Spyware Threats, Internet Security Threats, Application Security Threats, Threat Management, Software Security Threats, Information Security Threats, Threats, and Web Threats
DEFINITION: Parameter tampering is a form of Web-based hacking event (called an attack) in which certain parameters in the Uniform Resource Locator (URL) or Web page form field data entered by a user are changed without that user's authorization. This points the browser to a link, page or site other than the one the user intends (although it may look exactly the same to the casual observer). Parameter tampering  … 
Definition continues below.

SECURITY THREATS DEFINITION (continued): …  can be employed by hackers and identity thieves to surreptitiously obtain personal or business information about the user.Countermeasures specific to the prevention of parameter tampering involve the validation of all parameters to ensure that they conform to standards concerning minimum and maximum allowable length, allowable numeric range, allowable character sequences and patterns, whether or not the parameter is actually required to conduct the transaction in question, and whether or not null is allowed. Whitelisting (accepting only allowable input) is more effective than blacklisting (refusing … 
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