Cryptology: Art, Science, and Terminology
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Questions and Answers

What is the branch of mathematics encompassing both cryptography and cryptanalysis?

  • Calculus
  • Trigonometry
  • Algebra
  • Cryptology (correct)

What is the process of disguising a message to hide its substance called?

  • Encoding
  • Decryption
  • Encryption (correct)
  • Transposition

What is the term for the range of possible key values in a modern cryptographic algorithm?

  • Keyring
  • Keychain
  • Keyhole
  • Keyspace (correct)

What is the name for the practitioners of breaking ciphertext?

<p>Cryptanalysts (D)</p> Signup and view all the answers

What is the name for the mathematical function used for encryption and decryption?

<p>Cryptographic algorithm (A)</p> Signup and view all the answers

What is the process of turning ciphertext back into plaintext called?

<p>Decryption (B)</p> Signup and view all the answers

What is the main assumption about the attacker's knowledge of the cryptographic algorithm?

<p>The attacker knows every detail of the cryptographic algorithm (C)</p> Signup and view all the answers

In which type of attack can the attacker choose the plaintext that gets encrypted, potentially obtaining more information about the key?

<p>Chosen-Plaintext Attack (D)</p> Signup and view all the answers

What type of cipher involves replacing each character in an alphabet with another character in the same alphabet or even by a symbol of a different alphabet?

<p>Polyalphabetic Substitution Cipher (B)</p> Signup and view all the answers

What is a characteristic of the Vigenère Polyalphabetic Substitution Cipher?

<p>It is weak against count statistics of natural language plaintexts (B)</p> Signup and view all the answers

What is an S-Box in modern ciphers?

<p>A software or hardware module for substitution operation (D)</p> Signup and view all the answers

What was thought to be unbreakable for a long time due to its characteristic of smearing the statistics of natural language texts?

<p>Vigenère Polyalphabetic Substitution Cipher (D)</p> Signup and view all the answers

What did Thomas Jefferson's Cipher Wheel aim to protect communications from?

<p>Cryptanalysis (B)</p> Signup and view all the answers

Which type of attack involves the attacker knowing only the cipher text of several messages encrypted with the same key and/or several keys?

<p>Ciphertext-Only Attack (D)</p> Signup and view all the answers

What is the process of disguising a message in such a way as to hide its substance called?

<p>Encryption (D)</p> Signup and view all the answers

What is the name for the practitioners of breaking ciphertext?

<p>Cryptanalysts (C)</p> Signup and view all the answers

What is the name for the branch of mathematics encompassing both cryptography and cryptanalysis?

<p>Cryptology (D)</p> Signup and view all the answers

What is the name for a cryptographic algorithm, also called a cipher, which is the mathematical function used for encryption and decryption?

<p>Substitution (A)</p> Signup and view all the answers

What is the security of a modern cryptographic algorithm based on?

<p>Symmetric key (A)</p> Signup and view all the answers

In which process are both encryption and decryption operations dependent on the key?

<p>Key management (C)</p> Signup and view all the answers

What is the characteristic of the Vigenère Polyalphabetic Substitution Cipher?

<p>It smears the characteristic statistics of natural language text (A)</p> Signup and view all the answers

In which type of attack can the attacker choose a series of plaintexts based on the result of previous encryption, leading to potential differential cryptanalysis?

<p>Adaptive Chosen-Plaintext Attack (A)</p> Signup and view all the answers

What is the main assumption about the attacker's knowledge of the cryptographic algorithm?

<p>The attacker knows every detail of the cryptographic algorithm (A)</p> Signup and view all the answers

What is the process of disguising a message to hide its substance called?

<p>Steganography (D)</p> Signup and view all the answers

What is an S-Box in modern ciphers?

<p>A module implementing substitution operation (B)</p> Signup and view all the answers

What did Thomas Jefferson's Cipher Wheel aim to protect communications from?

<p>Eavesdropping (C)</p> Signup and view all the answers

What type of cipher involves replacing each character in an alphabet with another character in the same alphabet or even by a symbol of a different alphabet?

<p>Caesar Monoalphabetic Substitution Cipher (D)</p> Signup and view all the answers

What is the branch of mathematics encompassing both cryptography and cryptanalysis?

<p>'Cryptomathematics' (D)</p> Signup and view all the answers

What is the term for the range of possible key values in a modern cryptographic algorithm?

<p>'Cipher key space' (B)</p> Signup and view all the answers

What is the process of turning ciphertext back into plaintext called?

<p>'Decryption' (C)</p> Signup and view all the answers

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