0

i have developed windows application which is c# based and i also dumped my application in cd and dvd. Now my client requirement is he want lock the cd or dvd for 1 year period after 1 year that cd will not work. so can you please suggest is der any way to lock the cd for time defined time frame.

Thanks

user3454590
  • 77
  • 6
  • Given that you cannot create self destructing DVDs you would implement this in the software you are (presumably) distributing, E.g. [How to make software expire on a certain date on Windows?](http://stackoverflow.com/questions/1211817/how-to-make-software-expire-on-a-certain-date-on-windows) and many other dups – Alex K. Jul 10 '15 at 09:49

1 Answers1

0

As per @Alex k Comment you can't write CD/DVD with self remove or auto erase because its read only media but you need to implement login in your application and check date/year using your application .

But if if user change his system DateTime then your application may cracked :) so, best way to create serial no. and validate with your web/remote system .

  • Generate yourself a secret key for the product
  • Take the user's name
  • Concatentate the users name and the secret key and hash with (for example) SHA1
  • Unpack the SHA1 hash as an alphanumeric string. This is the individual user's "Product Key"
  • Within the program, do the same hash, and compare with the product key online. If equal, OK.
Anant Dabhi
  • 10,864
  • 3
  • 31
  • 49