https://security.stackexchange.com/questions/7467/how-secure-is-asking-for-specific-characters-of-passwords-instead-of-the-entire https://security.stackexchange

https://security.stackexchange.com/questions/7467/how-secure-is-asking-for-specific-characters-of-passwords-instead-of-the-entire https://security.stackexchange.com/questions/7467/how-secure... 12 years old post talking about polish banks and the reasoning :)