Project 1: Caesar Cipher Assignment Overview In this assignment, we are going to implement a simple encoding and decoding of text. As a result of working on this project, you will gain more experience with the use of: 1. string 2. if statement 3. for loop and while loop Background A rotation cipher is one of the simplest, plain-text ciphers, known since at least the time of Julius Caesar. It takes in a plain-text string, and translates it into a new string based on a rotation of the alphabet being used. The basis is a "rotation", a re-sequencing of an alphabet. Consider the following example. Consider the alphabet being a single string consisting of the lower case English letters as below (shown with each letter's associated index):
Project 1: Caesar Cipher Assignment Overview In this assignment, we are going to implement a simple encoding and decoding of text. As a result of working on this project, you will gain more experience with the use of: 1. string 2. if statement 3. for loop and while loop Background A rotation cipher is one of the simplest, plain-text ciphers, known since at least the time of Julius Caesar. It takes in a plain-text string, and translates it into a new string based on a rotation of the alphabet being used. The basis is a "rotation", a re-sequencing of an alphabet. Consider the following example. Consider the alphabet being a single string consisting of the lower case English letters as below (shown with each letter's associated index):
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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Question
How to develop a flowchart for Caesar cipher ? On paper
Transcribed Image Text:Project 1: Caesar Cipher
Assignment Overview
In this assignment, we are going to implement a simple encoding and decoding of text. As a result of working
on this project, you will gain more experience with the use of:
1. string
2. if statement
3. for loop and while loop
Background
A rotation cipher is one of the simplest, plain-text ciphers, known since at least the time of Julius
Caesar. It takes in a plain-text string, and translates it into a new string based on a rotation of the alphabet
being used. The basis is a "rotation", a re-sequencing of an alphabet. Consider the following example.
Consider the alphabet being a single string consisting of the lower case English letters as below (shown with
each letter's associated index):
Transcribed Image Text:bcde
fghij k
W X
y z
a
1
pqr
St
n
u
1 1
3 4 5 6 78 9 0
4
6.
8.
1
1
1
1
1
1
1
1
2
2
2
1
1
2 3
4
1
Then a rotation of 3 means that the first three letters of the alphabet are moved to the end of the
sequence, while the other letters move up, as shown below. Notice that the movement is done one
letter at a time.
a bcde fghij kI
mnopar
u v
w xy z
S
2 2 2 0 1 23 4 5 6 789 1
1 1
1 1
5 6 7 8
2 2
9 0
1
1
4
1
4
1
13
9
I,
Expert Solution
Step 1
Answer:
Code:
def enc():
text,s=input("Enter the string to be encoded: "),int(input("Enter the shift value(1-25): "))
result = ""
# transverse the plain text
for i in range(len(text)):
char = text[i]
# Encrypt uppercase characters in plain text
if (char.islower()):
result += chr((ord(char) + s - 97) % 26 + 97)
# Ignore rest
else:
result += char
print("Encrypted text: ",result)
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