For a certain computer program a password must be exactly 5
characters long. The first character...
For a certain computer program a password must be exactly 5
characters long. The first character can be any lowercase letter,
the second must be an uppercase letter, the third character must be
a number from 0 – 9, the fourth character can either be a lowercase
letter or a number 0 - 9, the fifth character has to be exactly the
same as the first character.
(6)
How many possible passwords are there?
What is the...
A computer password consists of: • letters {a, A, 6, B,
...,2,Z}, • digits {0, 1,...,9),...
A computer password consists of: • letters {a, A, 6, B,
...,2,Z}, • digits {0, 1,...,9), or = 16 • special characters
{!,@,#,$,%}. In addition, a password must • contain at least one
upper case letter, • contain at least one special character. How
many passwords of length 8 are possible?
2) Allowing (or requiring) users to use numerical digits
(including 0) and one of 28 “special...
2) Allowing (or requiring) users to use numerical digits
(including 0) and one of 28 “special characters” dramatically
increases the number of possible passwords. Furthermore, passwords
often are case-sensitive, effectively doubling the size of the
alphabet by defining 52 distinct letter characters.
Assuming that passwords are case-sensitive and can include
numerical digits and special characters, how many possible 6, 8 and
10 character passwords can be created? (8 points)
3) Allowing digits and special characters creates an enormous
number...
A company wants to impose a more secure password system for its
employees to use on...
A company wants to impose a more secure password system for its
employees to use on the company’s network. The current policy
requires a minimum of seven characters. The system under
consideration requires a minimum of eight characters. The new
system will allow repetition of characters, but not doubling (e.g.,
the sequence 121 would be acceptable, but not 112).
For both password systems, assume the following:
Only alphanumeric characters can be used in the passwords,
without any spaces or symbols....