Week 6
40 Questions
1 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

Which protocol uses 3DES symmetric key encryption and RSA for key exchanges and digital signatures?

  • S-HTTP
  • PGP
  • SET
  • PEM (correct)
  • What is the main purpose of Secure Electronic Transactions (SET)?

  • To provide security to email attachments
  • To encrypt credit card information transfers
  • To secure wireless networks
  • To protect against electronic payment fraud (correct)
  • Which modern cryptographic cipher is used by Pretty Good Privacy (PGP) for message encoding?

  • 3DES
  • AES
  • RSA
  • IDEA (correct)
  • Which protocol was an early attempt to provide security for 802.11 networks before being replaced by Wi-Fi Protected Access (WPA)?

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

    Which protocol allows the encryption of information passing between computers through a protected and secure virtual connection?

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

    What type of encryption uses Diffie-Hellman key exchange for deriving key material between peers on a public network?

    <p>Symmetric encryption</p> Signup and view all the answers

    Which encryption protocol provides six services including authentication by digital signatures and message encryption?

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

    In the context of secure communication, what does IPSec use Public-key cryptography for?

    <p>Signing the Diffie-Hellman exchanges</p> Signup and view all the answers

    Which protocol is known for providing improved user authentication using 802.1X and EAP?

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

    What is the primary function of Pretty Good Privacy (PGP) in email security?

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

    What is the purpose of Triple DES (3DES)?

    <p>To provide security beyond DES with a 64-bit block size and 56-bit key</p> Signup and view all the answers

    Which encryption method requires two different keys, one public and one private, for enciphering or deciphering messages?

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

    In asymmetric encryption, if Key A is used to encrypt a message, which key is required to decrypt it?

    <p>Key B</p> Signup and view all the answers

    What was the main purpose of developing the Advanced Encryption Standard (AES)?

    <p>To replace both DES and 3DES</p> Signup and view all the answers

    Where should Rachel store her public key to allow Alex to securely send messages to her?

    <p>On a public server for anyone to access</p> Signup and view all the answers

    What is steganography?

    <p>The technique of encoding digital images in a hidden manner</p> Signup and view all the answers

    Which modern version of steganography hides information in digital pictures or other images?

    <p>.bmp files</p> Signup and view all the answers

    What is the main purpose of Secure Sockets Layer (SSL) protocol?

    <p>To provide a secure channel over the public Internet</p> Signup and view all the answers

    What does Secure Hypertext Transfer Protocol (S-HTTP) primarily offer?

    <p>Encryption of individual messages between client and server</p> Signup and view all the answers

    In the context of secure communication protocols, what do true cryptosystems refer to?

    <p>Applications that protect confidential information effectively</p> Signup and view all the answers

    What is the most crucial factor in the strength of encryption applications and cryptosystems?

    <p>The length of the cryptovariable or key</p> Signup and view all the answers

    How is the security of encrypted data in cryptosystems primarily maintained?

    <p>By keeping some or all elements of the cryptovariable or key secret</p> Signup and view all the answers

    In terms of encryption key cracking, what is the relationship between the number of bits in a key and the operations needed for brute force attack?

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

    What does a computer need to perform to crack an encryption key using a brute force attack?

    <p>$2^k$ operations</p> Signup and view all the answers

    Why is it essential to keep some or all elements of the cryptovariable(s) secret in a cryptosystem?

    <p>To ensure the security of encrypted data</p> Signup and view all the answers

    What is a Template cipher used for?

    <p>Hiding messages in a book or letter</p> Signup and view all the answers

    What is the main purpose of Hash Functions?

    <p>Verifying message identity and integrity</p> Signup and view all the answers

    What distinguishes symmetric encryption from asymmetric encryption?

    <p>The types of keys used</p> Signup and view all the answers

    In symmetric encryption, what happens if one copy of the secret key is compromised?

    <p>An intermediate can decrypt messages without detection by sender/receiver</p> Signup and view all the answers

    Which cryptosystem is mentioned as an example of symmetric encryption in the text?

    <p>Data Encryption Standard (DES)</p> Signup and view all the answers

    What is the main purpose of cryptanalysis?

    <p>Breaking encryption codes</p> Signup and view all the answers

    Which method is used for scrambling data and involves replacing elements in the plaintext with other elements?

    <p>Transposition ciphers</p> Signup and view all the answers

    What type of key size is often used to determine the strength of encryption applications?

    <p>Symmetric key size</p> Signup and view all the answers

    Which cryptographic algorithms are commonly grouped into symmetric and asymmetric categories?

    <p>Public-key algorithms</p> Signup and view all the answers

    In cryptography, what is the purpose of a public-key infrastructure (PKI)?

    <p>Providing secure communication trust</p> Signup and view all the answers

    Which method is NOT a form of cryptography but is used to hide information during communication?

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

    What type of encrypted messages provide nonrepudiation by being independently verified?

    <p>Digital signatures</p> Signup and view all the answers

    Which mathematical algorithms generate message digests to confirm the identity of messages?

    <p>Hash functions</p> Signup and view all the answers

    Which encryption technique combines both symmetric and asymmetric approaches in most popular cryptosystems?

    <p>Public-key infrastructure (PKI)</p> Signup and view all the answers

    What is the purpose of generating a message summary using hash functions in encryption?

    <p>To confirm message integrity and identity</p> Signup and view all the answers

    More Like This

    Understanding HTTP Protocol Quiz
    0 questions
    Internet & HTTP Basics
    34 questions

    Internet & HTTP Basics

    EasygoingDialect5934 avatar
    EasygoingDialect5934
    Use Quizgecko on...
    Browser
    Browser