Trial software and registering

[Alex Tweedly]

Howard Bornstein wrote:

>I use an effective method of timing out software that isn't vulnerable
>to turning back the system date and doesn't rely on a data file. I
>check a system directory that is updated by access to the web (e.g. a
>directory that's a repository for internet cookies). In most companies
>these days, people access the interenet every day. Thus, there is
>almost always a file that's been created in that directory each day. I
>check the creation date of the latest file as my check file for the
>current date and compare that against the timeout date.
>  
>
Why is that not "vulnerable  to turning back the system clock" ?
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.

-- 
Alex Tweedly       http://www.tweedly.net



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