Computer Science

MAC address are globally unique and they don’t change except in rare instances where hardware changes.

a. Explain how the MAC address on your computer could be used as a “something you have” form of authentication.

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b. How could you use the MAC address as part of a two-factor authentication scheme?

c. How secure is your authentication scheme in part a? How much more secure is your authentication scheme in part b?

Suppose you have six accounts, each of which requires a password, and you choose distinct passwords for each account.

a. If the probability that any given password is in Trudy’s password dictionary is 1/4, what is the probability that at least one of your passwords is in Trudy’s dictionary?

b. If the probability that any one of your passwords is in Trudy’s dictionary is reduced to 1/10, what is the probability that at least one of your passwords is in Trudy’s dictionary?

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