The time needed to crack a password depends on the hacking methodology and on the
complexity and length of the password structure. If the hacker uses a brute force
password guessing strategy to hack a standard 8-character password, it could take
from 15 minutes (when the best hacking tools are run on a
supercomputer) and up to five days. Passwords that include numbers
alone are the easiest to crack, whereas passwords containing numbers, symbols,
lowercase letters, and uppercase letters are exponentially more difficult to
“attack”.