What is the rotor offset of an Enigma rotor with ring setting 10 and window letter S? O12 O None of these Question 5 (1 point) If using a fixed number of cables with an Enigma machine, how many cables would have maximized security? O 10 O 11 O 12 O None of these Question 6 (3 points) Describe what a crib is in the context of breaking Enigma. How did cryptanalysts narrow down what part of a ciphertext a crib could represent, given their knowledge of the Enigma machine design?

What is the rotor offset of an Enigma rotor with ring setting 10 and window letter S? O12 O None of these Question 5 (1 point) If using a fixed number of cables with an Enigma machine, how many cables would have maximized security? O 10 O 11 O 12 O None of these Question 6 (3 points) Describe what a crib is in the context of breaking Enigma. How did cryptanalysts narrow down what part of a ciphertext a crib could represent, given their knowledge of the Enigma machine design?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Alice and Bod have decided to use a symmetric encryption algorithm. They have some assumptions about their messages:- Messages only contain capital letters (i.e. A to Z)- The length of their shared key must be greater than or equal to the length of the plaintext- They assign each letter a number as follows: (A,0), (B,1), (C,2), (D,3),…, (Z,25)Their algorithm combines the key and the message using modular addition. The numerical values of corresponding message and key letters are added together, modulo 26. For example, if the plain text is “HELLO” and the key is “SECRET” then the encrypted message is calculated as following:Since the length of the plaintext is 5, we just need the first 5 letters of the key (i.e. “SECRE”), then for each letter, we should add corresponding letters in both the plaintext and the key modulo 26.Plaintext: H (7) E (4) L (11) L (11) O (14)Key: S (18) E (4) C (2) R (17) E(4)Cipher: Z (25) I (8) N(13) C(2) S (18) Write a program in Python, C/C++ or JavaScript to…