Information Assurance and Security: Encryption History
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Questions and Answers

What is the origin of the word cryptography?

  • From the Latin words for secret writing
  • From the Arabic words for encryption and decryption
  • From the Greek words for hidden and to write (correct)
  • From the French words for code and protect

    • What is the most basic cryptographic problem?

  • Concealing communication between two parties (correct)
  • Protecting confidential data
  • Creating complex mechanical machines
  • Using algorithms with keys to encrypt and decrypt information

    • What was the Enigma rotor machine?

  • A government agency for cryptanalysis
  • An early algorithm for encryption and decryption
  • A complex mechanical and electromechanical machine for encryption (correct)
  • A simple mechanical aid for encryption

    • What developed in parallel with the development of cryptography?

    <p>The breaking of codes and ciphers</p> Signup and view all the answers

    When did secure cryptography largely become the preserve of governments?

    <p>Until recent decades</p> Signup and view all the answers

    How is encryption achieved in modern times?

    <p>By converting messages and data into digital gibberish using algorithms with keys</p> Signup and view all the answers

    Why is it more difficult to crack a code with a longer key?

    <p>Because longer keys have more possible combinations, making brute force attacks harder</p> Signup and view all the answers

    What is the value of a single binary unit of information, or bit?

    <p>0 or 1</p> Signup and view all the answers

    What is the effective key length of the early US Government approved cypher DES?

    <p>56 bits</p> Signup and view all the answers

    What is a notable advance in the study of cryptography since World War II?

    <p>Introduction of asymmetric key cyphers</p> Signup and view all the answers

    What algorithms use two mathematically related keys for encryption of the same message?

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

    What protocol led the way for online transactions to take place?

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

    Before the introduction of AES, what was commonly used for encrypting information sent over the Internet?

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

    What does SSL stand for?

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

    Why did the need for encryption grow as wireless Internet connections became more common among households?

    <p>To prevent unauthorized access and protect privacy</p> Signup and view all the answers

    What is one significant learning outcome from the passage?

    <p>As technology advances, so does the quality of encryption</p> Signup and view all the answers

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