I want to have a list of IBAN in my database stored in Hash, then I want a user to put his IBAN (so a string), and make a comparison between this string value, and all my hash values.
Is this possible? if yes how should I proceed please?
I would suggest hashing your string in the same way you hashed the IBAN, and then running your comparison query as you would with any other field.
If you have any issues performing the above in the modeler you might have to do the actions in Java.
Hope this helps.