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3 cards from this section. Quick, good the night before a test.
What is a public key in the ElGamal encryption scheme?
Think about who can use it and how.
Briefly explain what ciphertext is.
What happens to the original message?
What does a public key allow anyone to do?
Consider who can access the public key.
True or False: The ElGamal scheme requires both sender and receiver to be online at the same time.
Think about the flexibility that public keys provide.
You are given a public key that we know is derived from a specific secret key. How might an attacker use this information to pose a threat, and what are the limits of their success?
Consider the implications of knowing the public key versus the private key.
Explain how ElGamal could be attacked if the discrete logarithm problem were solved efficiently. What would be the implications for secure communications?
Think about the relationship between the strength of the problem and its impact on cryptographic processes.
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