A) Charles Wheatstone B) Al-Kindi C) Leone Alberti D) Cicco Simonetta
A) 14th century B) 20th century C) 9th century D) 19th century
A) Merchant logs B) Diplomatic letters C) Study of Latin poetry D) Study of the Qur'an
A) Cicco Simonetta B) Al-Kindi C) Edgar Allan Poe D) Leone Alberti
A) Polyalphabetic substitution B) Polygraphic substitution C) Rotor encryption D) Homophonic substitution
A) Leone Alberti B) Al-Kindi C) Charles Wheatstone D) Cicco Simonetta
A) Polygraphic substitution B) Homophonic substitution C) Monoalphabetic substitution D) Rotor substitution
A) Charles Wheatstone B) Leone Alberti C) Al-Kindi D) Cicco Simonetta
A) Lack of security for short messages B) Increased complication leading to mistakes C) High cost of paper and ink D) Incompatibility with telegrams
A) It was too expensive to implement B) He believed attachés could not learn it C) It required bulky machinery D) It was already broken by the enemy
A) Simple substitution machines B) Manual telegraph keys C) Polygraphic cipher boards D) Rotor machines
A) Linguistic aptitude interviews B) Chess tournaments C) Crossword puzzle contests D) University math exams
A) Italy B) Germany C) Japan D) Austria
A) Early vacuum tube computers B) Enigma rotor machines C) Mechanical sliding rulers D) IBM card type machinery
A) The Tell-Tale Heart B) The Fall of the House of Usher C) The Murders in the Rue Morgue D) The Gold-Bug
A) The Adventure of the Dancing Men B) A Study in Scarlet C) The Hound of the Baskervilles D) The Sign of Four
A) Data decryption B) Cipher breaking C) Pattern matching D) Counting letters
A) Writing secure messages B) Breaking classical ciphers C) Speeding up encryption D) Creating new alphabets
A) T, H, E, and R B) Z, Q, X, and J C) E, T, A, and O D) S, S, E, and E
A) The 12 most frequent letters B) The 12 rarest letters C) The 12 most common trigrams D) The 12 most common bigrams
A) Letters are rearranged based on position B) Letters are removed entirely C) Each letter is replaced by a random symbol D) Each letter is replaced by another consistent letter
A) X (letter), LI (bigram), LIX (trigram) B) E (letter), TH (bigram), THE (trigram) C) I (letter), XL (bigram), XLI (trigram) D) L (letter), IV (bigram), LIV (trigram)
A) A text that omits a specific letter B) A type of frequency distribution graph C) A cipher that uses only vowels D) A method of encrypting numbers
A) The cryptanalyst is not using a computer B) Variation in statistics for individual plaintexts C) The cipher is too long D) The language is not English
A) They show less variation B) They have no statistical properties C) They show more variation D) They are easier to solve
A) E, T, A, and O B) Z, Q, X, and J C) T, H, E, and R D) S, S, E, and E |