Sonar now challenge-response activation?

From browsing around my account, there's now an activation tab and it looks like the new Sonar is going to be a challenge-response activation limited to a specific machine.  Is that correct?  Do we know how many machines?  With limited exceptions for special software I use only occasionally, I do not buy any challenge-response software, so this will probably be the end of the road for me for Sonar if this is true.  Bought every version since 3.0, but I won't continue if this is the case.
 

Cakewalk had and still does have one of the most flexible activation methods. Although I can't imagine what software you could possibly own if you don't even accept challenge response as a security precaution.

Bristol_Jonesey
 
What do you think the current system uses, if not challenge & response?
 
Every time you input a serial number you're doing exactly this!

The confusion may be over what the term "challenge & response" means. In its broadest sense BJ is correct, a password or serial number system qualifies as challenge and response authentication. The software asks you for your serial number, you respond with your serial number and an activity occurs as a result of your correct answer. But it is also a term used by some software vendors to describe a more restrictive system in which a hash is generated of your individual computer components which is then exchanged with the authentication server and locked into the account to prevent the software from being used on another machine.