Virtual Labs

Experiment 10: Elliptic-curve Diffie–Hellman (ECDH) Key Exchange Protocol

How is the secret key (K) calculated for User B in the ECDH Key Exchange Protocol?

a: By adding User B's private key to User A's public key. Explanation

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b: By multiplying User B's private key with a generator point on the elliptic curve (G). Explanation

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c: By subtracting User B's private key from a random number. Explanation

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d: By dividing User B's private key by a prime number (n). Explanation

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What does the shared secret key (K) represent in the ECDH Key Exchange Protocol?

a: User A's private key. Explanation

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b: User B's private key. Explanation

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c: A randomly generated value. Explanation

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d: A common secret known to both User A and User B. Explanation

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What role does the generator point (G) play in the ECDH Key Exchange Protocol?

a: It determines the size of the public keys. Explanation

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b: It is used to generate a random number for key derivation. Explanation

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c: It serves as the base point for elliptic curve operations. Explanation

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d: It specifies the prime number (n) used in key calculations. Explanation

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The base point on an elliptic curve is used for:

a: Multiplying with private key to generate the public key Explanation

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b: Decrypting messages Explanation

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c: Hashing messages Explanation

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d: Generating random numbers Explanation

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ECDH shared secret calculation is secure because:

a: It uses long keys only Explanation

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b: The elliptic-curve discrete logarithm problem is hard to solve Explanation

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c: Both parties exchange private keys securely Explanation

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d: It uses symmetric encryption Explanation

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Which of the following is true about ECDH?

a: Both parties derive the same shared secret independently Explanation

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b: The shared secret is sent over the network Explanation

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c: Only one party knows the shared secret Explanation

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d: ECDH cannot be combined with symmetric encryption Explanation

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