And what if the user hits back and then submits an older one? Will you be keeping the old ones in the db for a certain amount of time? Doesn't sound so secure to me.

The right way to ensure that client-side data has not been messed with is to use a message digest. This is described quite nicely in the free chapter from O'Reilly's CGI book.

In reply to Re: Secure State Maintenance by perrin
in thread Secure State Maintenance by George_Sherston

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