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Questions and Answers
What is the purpose of a cryptographic hash function?
What is the purpose of a cryptographic hash function?
- To generate truly random numbers
- To turn text into a fixed-length value called a hash (correct)
- To decode encrypted messages
- To encrypt data with a secret key
Which type of algorithm depends on the use of a secret key?
Which type of algorithm depends on the use of a secret key?
- Pseudorandom number generator
- Keyless algorithm
- Asymmetric encryption algorithm
- Symmetric encryption algorithm (correct)
What does a pseudorandom number generator produce?
What does a pseudorandom number generator produce?
- A sequence of Fibonacci numbers
- A deterministic sequence of numbers or bits that appears random (correct)
- A sequence of prime numbers
- A random sequence of numbers
In symmetric encryption, what does an encryption algorithm take as input?
In symmetric encryption, what does an encryption algorithm take as input?
What properties make a cryptographic hash function useful for cryptography?
What properties make a cryptographic hash function useful for cryptography?
What distinguishes a single-key cryptographic algorithm from others?
What distinguishes a single-key cryptographic algorithm from others?
What is the purpose of using a secret key in the permutation process?
What is the purpose of using a secret key in the permutation process?
In public-key encryption, what component is responsible for producing the scrambled message?
In public-key encryption, what component is responsible for producing the scrambled message?
What is the role of the decryption algorithm in public-key encryption?
What is the role of the decryption algorithm in public-key encryption?
What are the essential steps in public-key encryption?
What are the essential steps in public-key encryption?
Which component in public-key encryption varies for two different keys even with the same message?
Which component in public-key encryption varies for two different keys even with the same message?
What transformation does the encryption algorithm perform on the plaintext?
What transformation does the encryption algorithm perform on the plaintext?
What is the average time required for exhaustive key search when using a 128-bit key?
What is the average time required for exhaustive key search when using a 128-bit key?
Which of the following statements about the key search time is true?
Which of the following statements about the key search time is true?
What is a permutation in the context of encryption algorithms?
What is a permutation in the context of encryption algorithms?
How many permutations are possible for a set S = {a, b, c}?
How many permutations are possible for a set S = {a, b, c}?
What does it mean for a function to be a permutation in encryption algorithms?
What does it mean for a function to be a permutation in encryption algorithms?
Which factor significantly affects the time required for exhaustive key search in symmetric encryption algorithms?
Which factor significantly affects the time required for exhaustive key search in symmetric encryption algorithms?
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