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Mar 23

1. Calculate the number of passwords that
can be generated from the following character sets. Assume each password is 10
characters long. Use factorial or exponential notation to express your answer:
· How many passwords can be generated from the set of 26
upper case alphabetic characters? You can use each character more then once
(i.e. with replacement).

· How many passwords can be generated from the set of upper
and lower case alphabetic characters? You can use each character more then once
(i.e. with replacement).

2. Calculate the number of passwords from the following
character set {a, b, c, d, e}. Use factorial or exponential notation to express
your answer. Also calculate the integer answer. Assume the passwords contain 5
characters. There are two questions to be answered below. 20 points
· Number of passwords with character replacement.

· Number of passwords with no character replacement.

3. A type of security attack is called social engineering. 20
points
· Describe what a social engineering attack is.

· Provide examples of 3 specific social engineering attacks.

· Describe how social engineering attacks can be defended
against.

4. Write a password policy for your employer that could be
used for new employees. This policy should contain guidelines for the new
employee on how to: 20 points
· Select their password.
· Maintain their password.
· Protect their password.

5. This question is about dictionary attacks.

· Describe what a dictionary attack is.
· How can dictionary attacks be optimized for fast attacks?

· How can dictionary attacks be defended against? Consider
real time attacks and offline attacks where the password file has been stolen.
Provide 2 examples with descriptions.

For the following questions I would
like you to discuss the particulars of each attack scenario and how Kerberos
defends against it.

You will need to consider various elements of the attack scenarios. Some
attacks can be implemented between multiple Kerberos components. For example, a
MITM attack could occur between various components at various times. State you
assumptions about how the attack is occurring then describe how Kerberos
defends against it. Good answers will describe both the particulars of the
attack and the Kerberos defenses.
1. A user gains access to a particular workstation and
pretends to be another user from that workstation.

2. An eavesdropper obtains the IP address of an authenticated
workstation and reconfigures another workstation to impersonate the
authenticated workstation.

3. An eavesdropper captures messages and attempts a replay
attack to access a server or cause damage.

4. An eavesdropper obtains the IP address of a server and
reconfigures another machine to impersonate the server and capture user
requests.

5. An attacker acts as the “man in the middle” between two
computers (e.g. client and the server). The attacker spoofs each computer to
“think” they have connected to the correct computer, when in fact the attacker
is intercepting all transmissions. The attacker can then monitor or change any
of the data before routing it on to the intended computer.

  

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