On Mar 18, 2005, at 11:07 AM, Alex Tweedly wrote:
Why is that not "vulnerable to turning back the system clock" ?I check the creation date of the latest file as my check file for the current date and compare that against the timeout date.
If I set my system clock to a year ago, then each time I access the web, I'll create my cookie files with dates in 2004.
Perhaps, that would not be vulnerable to _temporarily_ turning back the system clock. It might be reasonable to check for dates lots of places and then assume that the current real date is the latest of those or later. One can't prove that a demo is valid, but it the assumption holds then one can prove that it has expired.
Dar
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