Wrong password while updating to IOS 7.1.2

Hello everyone,

So on the day it has happened it was all ok in the morning, I put in my password and the iPad did unblock. I did some stuff on the internet and then I saw a suggestion to update to a new IOS 7.1.2. I clicked on the update button and then it asked me for my password. I assumed that it should be my normal apple ID password, however the keyboard did not have letters, I mean I could only insert numbers. So then I thought that maybe it requires my normal 4 digit password which I use to unlock the iPad. So I typed it in and then my iPad said: "Wrong password" I tried again and again it would not work. So now my iPad is blocked and I cannot unblock it with my password.

Then I have decided to try to update my iPhone as well to see if i get the same problem and it did. Though I could unblock my iPhone with a 4 digit password I stopped using ages ago. Which seems to be very weird as I have changes my password so many times since that one so I have not idea why it has worked.

So my question is, how could this happen, what should I do now considering the fact that I am on holidays and the computer I synced my iPad with is like miles away. Could it be a some kind of virus? Before you ask me if I am sure whether the password is correct or not I wanna say that yes I am 100 percent sure that the password I am trying to use is the one. Maybe someone has that problem as well? Thank you all in advance.

I have posted this question to an iPad forum and got no answer, therefore since this problem has occurred on my iPhone as well i find it appropriate to start a discussion here.