You are given a string that was encoded by a Caesar cipher with an unknown distance value. The text can contain any of the printable ASCII characters. Suggestan algorithm for cracking this code.

Answered: Tou are given a string that was encoded…

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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You are given a string that was encoded by a Caesar cipher with an unknown distance value. The text can contain any of the printable ASCII characters. Suggest
an algorithm for cracking this code.

Expert Solution

Step 1

Printable ASCII characters range from 32 (decimal value) to 126 (if we consider spaces,
otherwise from 33 to 126).
In caeser cipher, when encrypting each ASCII character is shifted by an integer
value. When decrypting, each character is again shifted by the integer to get the 
original character. For example, if key is 2 then 'a' will be shifted to 'c' while encrypting 
and for decryption 'c' will be shifted down to 'a'.
So maximum value for key can be 94.

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