I want to make licencing software. For that first i am retrieving hdd serial no, nic mac address. But the prob is, what if someone changes/replicates its hdd serial no or mac address ?

Many softwares are available to do so, in market.

How can I find some unique identifiable string for a machine that user can not change?

thnx

Spell your words out.

What "softwares" are you talking about? Got an example?

Also, doing what you're suggesting is only going to annoy any paying customers you might have, not prevent any sort of determined theft. If a hard drive or NIC dies and needs to be replaced, would you like to repair a system, only to have the software you PAID FOR, not function any longer? Anything the customer CAN change, they may. Sounds like you're wanting to do exactly what Microsoft is doing with Windows....no one likes that either, and it isn't stopping Windows from being stolen, and they're spending millions on it.

1 members found this post helpful.

OK, I got ur point. Especially I like the below, since I belong to LINUX only....

Thnx for the reply

Again, you need to spell out your words.