Unlocking the Secrets of Symmetric Key Cryptography
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Questions and Answers

Which type of cipher encrypts each bit in the plaintext message one bit at a time?

  • Block cipher
  • Certificate authority
  • RSA algorithm
  • Stream cipher (correct)

    • Which type of cipher takes a predetermined number of bits, known as a block, and encrypts that block?

  • Stream cipher
  • Block cipher (correct)
  • RSA algorithm
  • Certificate authority

    • By setting the block size to one bit, a block cipher can act as which type of cipher?

  • Certificate authority
  • RSA algorithm
  • Stream cipher (correct)
  • Block cipher

    • Which type of cipher is often slower but more versatile compared to stream ciphers?

    <p>Block cipher</p> Signup and view all the answers

    The RSA algorithm is an example of which type of cryptography?

    <p>Asymmetric-key algorithm</p> Signup and view all the answers

    What does SSL stand for?

    <p>Secure Sockets Layer</p> Signup and view all the answers

    What is the purpose of a digital signature?

    <p>To detect changes to a message</p> Signup and view all the answers

    What is a certificate authority responsible for?

    <p>Signing certificates</p> Signup and view all the answers

    What does a certificate allow you to verify?

    <p>The association of a public key with an individual</p> Signup and view all the answers

    What is the RSA algorithm named after?

    <p>Its creators</p> Signup and view all the answers

    Which component is NOT part of a PKI infrastructure?

    <p>Encryption algorithms</p> Signup and view all the answers

    Which of the following is NOT a reason for revoking a certificate in PKI?

    <p>Change in certificate owner's name</p> Signup and view all the answers

    Which type of data is considered 'data at rest'?

    <p>Backup tapes</p> Signup and view all the answers

    Which two protocols are commonly used to secure VPN connections?

    <p>IPsec and SSL</p> Signup and view all the answers

    Which type of VPN connection requires a more complex hardware configuration?

    <p>IPsec VPN</p> Signup and view all the answers

    What is the weakness of SSL VPN?

    <p>Can be downloaded to public computers</p> Signup and view all the answers

    What does a digital signature ensure in addition to message integrity?

    <p>Message authenticity</p> Signup and view all the answers

    What is the purpose of a registration authority in PKI?

    <p>To issue and verify certificates</p> Signup and view all the answers

    What is the difference between data at rest and data in motion?

    <p>Data at rest is stored on backup tapes, while data in motion is sent over the internet</p> Signup and view all the answers

    What is the relationship between SSL and TLS?

    <p>TLS is the evolution of SSL</p> Signup and view all the answers

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