Hi! I would like to ask about using YUBIKEY. I have two computers and wont to use my cheat-accout on both in the different time. One of yours sellers said to me that I have to buy yours YUBIKEY. How mych does it cost ( if for CIS countries price is differ than in Europe - please name the price for CIS countries )? And what is the different between different versions/models of YUBIKEY. Thanks.