if it is not activated, you need to enter a CDKEY, that is decrypted and verified if the CDKEY is valid.
possible functional modules:
- encryption module (CDKEY generator) (/ "Select encryption and decryption" method library)
- decryption module
this is a problem, it is said to use encryption and decryption method library, but I think I have to implement the algorithm to generate cdk according to certain rules. When users enter cdk, they need to verify whether it is cdkey, according to my algorithm, but I can"t write it, or if there is any library, you can tell me.