I have recently received my Yubikey, and I think this is an innovative, easy to use two-factor authentication device. But I am a bit in
because the modhex alphabet includes the English " i = I " character which corresponds to " i = İ ", or " ı = I " in Turkish. While Turkish Q keyboards are standard QWERTY keyboards which have some extra characters ĞÜŞİÖÇ placed on the right part of the keyboard. So I thought Yubikeys should work on these keyboards -that's why there's something called ModHex, but the " i " character is the problem here. So my Yubikey produces OTPs including " ı I " characters, because the I key on Turkish keyboards is used to print lower case ı and upper case I, which is the i letter in English. I think when you were evaluating different keyboard layouts which are used in many European countries and very similar to QWERTY, as the Turkish Q keyboards do, you shouldn't include the " I " key in ModHex. So I can't use my Yubikey with its plain state, but if I hold the Shift key in my keyboard and press my Yubikey, it generates upper case letters so the lower case ı's in the OTP became upper case I's which truly corresponds to English upper case " i = I " character. I hope systems and applications won't differentiate between upper case and lower case OTPs, or behave keyboard-layout-independent using some libraries some people have written. This problem is general within computer systems and applications as stated in http://www.codinghorror.com/blog/archives/001075.html by Jeff Atwood and in http://www.moserware.com/2008/02/does-your-code-pass-turkey-test.html by Jeff Moser. We suffer from this problem in many other situations.I hope I will be able to continue to use my Yubikey on as many systems as if they support upper case OTPs. I think this situation should be stated on developer documents and there should be an option in the configuration tool, to make OTPs always in upper case. I hope this doesn't break some other things. (For example the option to make the first two letters upper case to conform with legacy systems can be changed to make the first two lower when used together with this option.)
