Gets or sets a value that specifies whether ASP.NET should run a message authentication code (MAC) on the page's view state when the page is posted back from the client.
Documentation for this section has not yet been entered.
A view-state MAC is an encrypted version of the hidden variable that a page's view state is persisted to when the page is sent to the browser. When this property is set to true, the encrypted view state is checked to verify that it has not been tampered with on the client.
This attribute should never be set to false in a production Web site.