[elektro-etc] Citi out

[Kaczmarek Edvard]

> Nekem mindig ugyanazzal a (legutolsó) kóddal érkezett a kártyám. A kód nem a 
> kártyán van, hanem a banki rendszerben társítják a kártyához.. Szvsz.

There are three methods of selecting or generating a PIN:

assigned derived PIN
     The card issuer generates the PIN by applying some 
cryptographic function to the account number or other value 
associated with the customer. In this case the issuer need not - 
and should not - keep a record of the PIN, because it can be 
derived again when it needs to be verified.

assigned random PIN
     The card issuer generates a PIN value using a random number 
generator.

customer-selected PIN
     The customer selects the PIN value.