Cryptography Basics
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Questions and Answers

What is the length of the longest known factorization of a product of two prime numbers?

  • 1024 bits
  • 2048 bits
  • 512 bits (correct)
  • 256 bits

    • What is the importance of generating RSA keys randomly?

  • It prevents brute-force attacks
  • It avoids certain types of attacks and increases the security of the system (correct)
  • It increases the computational complexity
  • It evades man-in-the-middle attacks

    • Why is it recommended to choose a large private key 'd'?

  • To prevent Wiener's attack (correct)
  • To enable efficient exponentiation
  • To ensure compatibility with older systems
  • To increase the key size

    • What is the recommended value for 'e' in RSA key generation?

    <p>65537</p> Signup and view all the answers

    Why is it important to choose prime numbers 'p' and 'q' of the same length?

    <p>To prevent certain attacks and ensure security</p> Signup and view all the answers

    What is the recommended method for encoding in RSA digital signature schemes?

    <p>PSS</p> Signup and view all the answers

    What is the block size of the Blowfish cipher?

    <p>64-bit</p> Signup and view all the answers

    What is a potential weakness of using short RSA secret exponents?

    <p>Susceptibility to cryptanalysis</p> Signup and view all the answers

    What can be a consequence of using a known-plaintext attack on two-key triple encryption?

    <p>Compromised encryption security</p> Signup and view all the answers

    What is a primary consideration when selecting a cryptographic algorithm?

    <p>Security against cryptanalysis</p> Signup and view all the answers

    What can be a trade-off when using longer key lengths in cryptographic algorithms?

    <p>Increased computational overhead</p> Signup and view all the answers

    What is the recommended key length for personal activities?

    <p>768 bits</p> Signup and view all the answers

    What happens if the number n can be factorized?

    <p>The private key d can be easily calculated</p> Signup and view all the answers

    What is the relationship between key length and security?

    <p>Longer keys are more secure</p> Signup and view all the answers

    What is the recommended key length for corporate use?

    <p>1024 bits</p> Signup and view all the answers

    Why is key length important in cryptography?

    <p>It determines the security of the system</p> Signup and view all the answers

    What is the recommended key length for high-risk activities?

    <p>2048 bits</p> Signup and view all the answers

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