Cryptology: Art, Science, and Terminology

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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?

Cryptanalysts Signup and view all the answers

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

Cryptographic algorithm Signup and view all the answers

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

Decryption Signup and view all the answers

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

The attacker knows every detail of the cryptographic algorithm 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?

Chosen-Plaintext Attack 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?

Polyalphabetic Substitution Cipher Signup and view all the answers

What is a characteristic of the Vigenère Polyalphabetic Substitution Cipher?

It is weak against count statistics of natural language plaintexts Signup and view all the answers

What is an S-Box in modern ciphers?

A software or hardware module for substitution operation 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?

Vigenère Polyalphabetic Substitution Cipher Signup and view all the answers

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

Cryptanalysis 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?

Ciphertext-Only Attack Signup and view all the answers

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

Encryption Signup and view all the answers

What is the name for the practitioners of breaking ciphertext?

Cryptanalysts Signup and view all the answers

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

Cryptology 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?

Substitution Signup and view all the answers

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

Symmetric key Signup and view all the answers

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

Key management Signup and view all the answers

What is the characteristic of the Vigenère Polyalphabetic Substitution Cipher?

It smears the characteristic statistics of natural language text 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?

Adaptive Chosen-Plaintext Attack Signup and view all the answers

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

The attacker knows every detail of the cryptographic algorithm Signup and view all the answers

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

Steganography Signup and view all the answers

What is an S-Box in modern ciphers?

A module implementing substitution operation Signup and view all the answers

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

Eavesdropping 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?

Caesar Monoalphabetic Substitution Cipher Signup and view all the answers

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

'Cryptomathematics' Signup and view all the answers

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

'Cipher key space' Signup and view all the answers

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

'Decryption' Signup and view all the answers

Cryptology: Art, Science, and Terminology

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Questions and Answers

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

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

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

What is the name for the practitioners of breaking ciphertext?

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

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

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

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

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?

What is a characteristic of the Vigenère Polyalphabetic Substitution Cipher?

What is an S-Box in modern ciphers?

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

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

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

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

What is the name for the practitioners of breaking ciphertext?

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

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

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

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

What is the characteristic of the Vigenère Polyalphabetic Substitution Cipher?

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?

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

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

What is an S-Box in modern ciphers?

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

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?

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

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

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

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