Virtual Labs

What is a hash function?

a: A function that converts data of arbitrary size into a fixed-size string of bytes. Explanation

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b: A function that encrypts data to ensure its security during transmission. Explanation

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c: A function that compresses data to reduce its size. Explanation

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d: A function that validates data integrity by appending a checksum. Explanation

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What is collision resistance in the context of hash functions?

a: It ensures that the hash function produces a unique output for each unique input. Explanation

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b: It ensures that it is computationally infeasible to find two distinct inputs that hash to the same value. Explanation

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c: It ensures that given a hash value, it is computationally infeasible to find any input that hashes to that value. Explanation

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d: It ensures that given an input, it is computationally infeasible to find another input that hashes to the same value. Explanation

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What is preimage resistance in the context of hash functions?

a: It ensures that the hash function produces a unique output for each unique input. Explanation

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b: It ensures that it is computationally infeasible to find two distinct inputs that hash to the same value. Explanation

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c: It ensures that given a hash value, it is computationally infeasible to find any input that hashes to that value. Explanation

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d: It ensures that given an input, it is computationally infeasible to find another input that hashes to the same value. Explanation

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What is second preimage resistance in hash functions?

a: It ensures that given an input, it is computationally infeasible to find another input that hashes to the same value. Explanation

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b: It ensures that it is computationally infeasible to find two distinct inputs that hash to the same value. Explanation

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c: It ensures that given a hash value, it is computationally infeasible to find any input that hashes to that value. Explanation

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d: It ensures that every input has a unique hash value. Explanation

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Which of the following is NOT a primary property of cryptographic hash functions?

a: Preimage resistance Explanation

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b: Second preimage resistance Explanation

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c: Determinism Explanation

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d: Reversibility Explanation

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Why are hash functions widely used in password storage?

a: They allow easy retrieval of the original password. Explanation

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b: They ensure that even if the hash is exposed, the original password remains secure. Explanation

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c: They compress passwords to save storage space. Explanation

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d: They allow passwords to be encrypted and decrypted efficiently. Explanation

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Cryptographic Hash Function Properties