Assignment #5, Due 4 Oct

1.

Prove to me that you have decrypted the secret code word I sent you.

2.

Do Exercise 1 on page 129 of Cryptology . This should take you $\frac{1}{2}$-1 page.

3.

Pages 101-102 of Cryptology explain some advantages of public key cryptosystems, including:

• No key exchange among the participants is necessary.
• On needs relatively few keys.
• New participants can join the system without new problems for the old members.

Consider one of the uses for secure communications that we have discussed. (E.g., medical, military, e-commerce, etc. This may or may not be the one that you have addressed in previous papers.) Explain one way in which one or more of the advantages above can be exploited in your chosen area. (Do not consider digital signatures for this assignment.) Remember that public key cryptography is not necessary or well-suited to regulate read/write access.

Your explanation should be 1-2 pages long, with normal font size and spacing. You do not need to use sources other than your textbooks, but if you do you should cite them. (You do not need to cite your textbooks.) I will grade on spelling, grammar, and punctuation in addition to content.

If you have any questions, please ask!

About this document ...

Assignment #5, Due 4 Oct

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