The library comes in the form of a DLL that contains an encryption mechanism and a secret key that will protect your software from being used without your knowledge.

In order to protect your software, you will add certain calls to the library in your code, which will activate the security mechanism every time your program runs.

When running your program for the first time, the user is presented with a registration window, which contains your contact details. A registration key is displayed in the window and the user is requested to send it to your company via email, fax, or telephone

The expiry date is encoded and a new key is generated for your client. After receiving the key from you, the user enters the key on the registration window, and the protected program is activated. The user will not see the registration window again until the expiry date.

The unlocking key is tamper-proof, and protected by 448-bit encryption. Even resetting the PC's clock will not enable the user to use the software past the expiry date.