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3 cards from this section. Quick, good the night before a test.
What are the two keys used in public key cryptography?
Think about the terms used for keys.
What does ciphertext refer to?
Consider what happens to a message during encryption.
What is the main advantage of public key cryptography over symmetric key systems?
Consider the role of public and private keys.
True or False: ElGamal encryption relies on the difficulty of factorizing large integers.
Think about the mathematical foundation of ElGamal.
Using RSA, describe how you would encrypt a message if your public key is (N=15, e=7) and the message is 3. What would be the ciphertext?
Use exponentiation and modulo operations to find the answer.
Discuss the implications of a scenario where the private key of an ElGamal encryption system is compromised. What would be the worst-case scenario?
Think about the effects on confidentiality and sender authenticity.
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