Agreed- those are systems used on European bikes. Yamaha FJR's have immobilizers in them when they are sold in Europe but not the US. That particular site also references 'red' keys and 'black' keys which sounds like the system Ducati uses and is not similar to KiPass.
KiPass is based on permanently encoded fobs and the bike is programmed to recognize the correct one(s). It is a fundamentally different system that what is commonly used on cars where the key has an chip inside it; those systems have the keys encoded to work with the vehicle unlike KiPass which has a code embedded (called 'hard coded') in each fob when the wafers are cut (the same way each Intel processor has a unique code hard coded into it when the silicon wafer is manufactured).
I won't say something stupid like 'it can't be done' but I doubt that anyone can manufacture / code a remote fob for KiPass without already having a valid for code; in other words, without having a valid fob available. I believe the original idea that goes with KiPass remains- lose the last valid fob and you are off to get a new KiPass ECU and at least one valid fob that goes with that ECU. New KiPass ECU's from Kawasaki come with two fobs because a new ECU without any fobs won't do anyone any good and cannot be used. For anyone interested, there is an abundance of information available about how encryption works generally; KiPass uses Mitsubishi’s MISTY system specifically and there is a fair amount of information about that system available too.
One final, hopefully logical, thought: Is it really likely that some individual hacker, no matter how naturally talented or intelligent, is likely to outwit a system designed by professional cryptographers, likely at least as intelligent and very well schooled on the ways and means of encryption? There are an infinite number of codes that are wrong but only one that is correct and figuring out that one code is not easy nor is there a straightforward method of determining that code as it is truly random.
Brian
Seems like the OP might have the wrong idea about the kipass system. The web site sounds like chip embedded keys not FOBs.