Trial software and registering
alex at tweedly.net
Fri Mar 18 12:07:53 CST 2005
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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