Visual Cryptography: Encryption and Decryption
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Questions and Answers

What is another name for asymmetric key encryption?

  • Public key encryption (correct)
  • Visual encryption
  • Symmetric key encryption
  • Private key encryption

    • In visual cryptography, how is a secret binary image encrypted?

  • It is encrypted as a single image on a single transparency sheet
  • It is encrypted as a grayscale image for better security
  • It is encrypted as 2 binary images on separate transparency sheets (correct)
  • It is encrypted as a colored image for visual appeal

    • What does a public key in asymmetric key encryption refer to?

  • An encrypted key
  • A secret key
  • A temporary key
  • A widely distributed key (correct)

    • What is the primary purpose of visual cryptography?

    <p>To present decrypted messages as visual information</p> Signup and view all the answers

    What is the significance of using large prime numbers in asymmetric key encryption?

    <p>To increase security by making it hard to factorize the keys</p> Signup and view all the answers

    How does visual cryptography differ from conventional text-based encryption methods?

    <p>It presents decrypted messages as visual information</p> Signup and view all the answers

    What is the main purpose of encryption?

    <p>To prevent unauthorized access to data</p> Signup and view all the answers

    Which encryption technique uses the same key for both encryption and decryption?

    <p>Symmetric Key Encryption</p> Signup and view all the answers

    What is the main vulnerability associated with Symmetric Key Encryption?

    <p>Key interception by attackers</p> Signup and view all the answers

    Which encryption method is susceptible to interception due to the need for key distribution?

    <p>Symmetric Key Encryption</p> Signup and view all the answers

    What kind of network encryption is WPA2 commonly used for?

    <p>Wireless network encryption</p> Signup and view all the answers

    In Caesar Cipher, what happens to each letter or character in the plaintext?

    <p>It gets shifted by a fixed number of positions</p> Signup and view all the answers

    When using asymmetric key encryption, who uses their private key to decrypt the message?

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

    In asymmetric key encryption, what is the purpose of using the public key?

    <p>To encrypt the message</p> Signup and view all the answers

    What is the main concern of data security in computer studies?

    <p>Protecting software and data from unauthorized tampering</p> Signup and view all the answers

    In the context of privacy in computer studies, what is a common measure used by companies to prevent data tampering?

    <p>Careful screening of job applicants</p> Signup and view all the answers

    What is the purpose of visual cryptography in computer studies?

    <p>Enhancing data security through image encryption techniques</p> Signup and view all the answers

    How do large organizations ensure continuity in computer operations during disasters according to the text?

    <p>Having disaster recovery plans</p> Signup and view all the answers

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