Implementing Expiration Dates in an application?

Question

I\'d like to put an expiration date in some software I made. Obviously

psuedocode:

if time() > xxx: exit()

All someone has to do he

Answer 1

There's no real solution here - anything can be cracked. You could consider:

• checking the time with an online service
• storing the last run date and checking to make sure that it isn't after the current date
• checking the "last modified" date on some system files.