CSSE/MA479: Cryptography

Homework 5: Using RSA (actually an in-class assignment)

Please work with a partner.

• From the middle of p. 167 and the discussions on section 6.2 on "attacking RSA", name 5-6 considerations that you should take in mind when choosing p, q, e, d, and your message.






















• Note that you won't be able to account for all of these reasonably when you do this exercise; that's OK for now.
• Publish your key Please pick values of n and e using Maple, and send them to your partner, say via email.
• When you have received values of n and e from your partner, encrypt a short message and send the ciphertext back to your partner.
• When you receive ciphertext from your partner, decrypt it using your value of d and φ(n)



• Write the message here: __________________________