How many possible combinations are there for a computer password that must contain 6 letters?

308915776 to be exact. This is assuming you are able to select the same letter multiple times.

How many different passwords are possible with 8 characters?

200 billion possible combinations
An eight-character password using only lowercase and uppercase characters has 200 billion possible combinations.

How secure is a 6 character password?

If you create a password with 6 digits, there are a million possibilities. If you use, however, six lower-case letters, the number jumps to over 300 million. And if you use a combination of upper- and lower-case letters, you get 2 billion different combinations.

What is a 6 digit password?

By the way, the most common four-digit PINs according to the study are: 1234, 0000, 2580, 1111 and 5555 (scroll down for a longer list) – 2580 is there because it is a vertical column on a numeric keypad….Why six digit PINs are no better for security than four digits.

How many characters are there in a computer password?

Suppose that a password for a computer system must have at least 8, but not more than 12, characters, where each character in the password is a lowercase English letter, an uppercase English letter, a digit, or one of the six special characters *, >, <, !, +, and =. (a) How many different passwords are available for this computer system?

What are the character requirements for a password hint?

“Password must be eight characters long and contain at least one lowercase letter, one uppercase letter, one number, and one special character.” So it can not be longer or shorter than 8 characters, but must be exactly 8 characters. Nov 29, 2018 How do I create a password hint?

How many passwords begin with a digit?

You’re not taking into account that the digit can occur in any of the six positions. There are 10 ⋅ 36 5 passwords that begin with a digit. There are also 10 ⋅ 36 5 passwords that end with a digit; some of these also begin with a digit and have already been counted, but some do not, so your figure of 10 ⋅ 36 5 is necessarily too small.

How long does it take for a 10 character password to break?

Nine-character passwords take five days to break, 10-character words take four months, and 11-character passwords take 10 years. Make it up to 12 characters, and you’re looking at 200 years’ worth of security – not bad for one little letter. What is a strong password example?