So logining in need one short press, and withdrawing need one long press.
But can yubikey be copied? Software way or Hardware way?
The YubiKey provides strong two-factor authentication, combining something you know (a password) with something you have (a YubiKey). It protects your online identity from viruses, Trojans and hackers at a security level that can be compared with a smart card. To guarantee a secure life-cycle, the YubiKey is manufactured in Sweden with best practice security processes.
And i am curious about how piuk make use of a MtGox yubikey too.