Don't trust user input

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This is a principle or a set of principles. To view all principles, please see the Principle Category page.



Last revision (mm/dd/yy): 04/7/2009

Description

A user or client will not always submit data your application will expect. By building robust applications that do not trust user input by default, you ensure the application will be able to handle unexpected data gracefully. Examples of user input include: form data, client information such as user-agent strings, cookies, referer, etc. Anything that is submitted in an HTTP request should be considered user input.

Examples

Phone number

A short example description, small picture, or sample code with links

Short example name

A short example description, small picture, or sample code with links


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