A very short alphabet - Colegiul National C. Negruzzi (Iași - Roumanie)

We choose a complex problem which it’s very useful in everyday life for creating and decoding passwords. How many times were you uncertain about your security level on social media or your smartphone and your computer? The problem is in the way we create passwords. But the real problem is not for us, ordinary people, but for big companies because it is very important and even essential to them and perhaps for the national security to make a very strong password. This problem may give us a short insight on how word passwords could be created when specific requirements for the letter arrangements have to be satisfied.