Choosing secure passwords
• Expected time (in seconds) to guess a password is
N/R
N: Size of the set of possible passwords.
R: Number of passwords that can be tested in a
second.
• For a randomly generated password of length 8, with
each element with being a lower case character a-z, and
1 millisecond testing time, it takes nearly 3 years =>
Proof by yourself..and tell me if the statement is correct.
• A password chosen as above is secure but hard to
remember.