Write a Python program to implement Caesar cipher. Caesar cipher is used to encrypt text by replacing each letter by another letter that comes after it in the alphabet by a fixed number of letters (encryption number n). If the last letter of the alphabet (letter 'z') is reached, the program continues to count from the beginning of the alphabet (letter 'a'). The user enters the text and the encryption number (n), and the program prints the encrypted text. The program can be used to decrypt an encrypted text by entering the encrypted text and the negative value of encryption number (-n).

Write a Python program to implement Caesar cipher. Caesar cipher is used to encrypt text by replacing each letter by another letter that comes after it in the alphabet by a fixed number of letters (encryption number n). If the last letter of the alphabet (letter 'z') is reached, the program continues to count from the beginning of the alphabet (letter 'a'). The user enters the text and the encryption number (n), and the program prints the encrypted text. The program can be used to decrypt an encrypted text by entering the encrypted text and the negative value of encryption number (-n).

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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A simple and very old method of sending secret messages is the substitution cipher. You might have used this cipher with your friends when you were a kid. Basically, each letter of the alphabet gets replaced by another letter of the alphabet. For example, every 'a' get replaced with an 'X', and every 'b' gets replaced with a 'Z', etc. Write a program thats ask a user to enter a secret message. Encrypt this message using the substitution cipher and display the encrypted message. Then decryped the encrypted message back to the original message. You may use the 2 strings below for your subsitition. For example, to encrypt you can replace the character at position n in alphabet with the character at position n in key. To decrypt you can replace the character at position n in key with the character at position n in alphabet. Have fun! And make the cipher stronger if you wish! Currently the cipher only substitutes letters - you could easily add digits, puncuation, whitespace and so forth.…
A Caesar cipher is a simple substitution cipher based on the idea of shifting each letter of the plaintext message a fixed number (called the key) of positions in the alphabet. For example, if the key value is 2, the word "Sourpuss" would be encoded as "Uqwtrwuu." The original message can be recovered by “reencoding" it using the negative of the key. Write a program that can encode and decode Caesar ciphers. The in- put to the program will be a string of plaintext and the value of the key. The output will be an encoded message where each character in the orig- inal message is replaced by shifting it key characters in the Unicode char- acter set. For example, if ch is a character in the string and key is the amount to shift, then the character that replaces ch can be calculated as: chr (ord (ch) + key). 62
Python The Dan Cipher works like this: shift the first lowercase character to the right by 1, the second lowercase character to the right by 2, and so on. Characters that are not lowercase characters are not changed. Write a program that takes a string and prints the result of applying the Dan Cipher.
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Many user-created passwords are simple and easy to guess. Write a program that takes a simple password and makes it stronger by replacing characters using the key below, and by appending "q*s" to the end of the input string. i becomes ! a becomes @ m becomes M B becomes 8 o becomes . Ex: If the input is: Mypassword The output is: Myp@ssw.rdq*s Write a program to get the above task done. Use switch statement to handle the conditional part of the code.
Many user-created passwords are simple and easy to guess. Write a program that takes a simple password and makes it stronger by replacing characters using the key below, and by appending "!" to the end of the input string. . i becomes 1 • a becomes @ . m becomes M • B becomes 8 • s becomes $ Ex: If the input is: mypassword the output is: Myp@$$word! Hint: Python strings are immutable, but support string concatenation. Store and build the stronger password in the given password variable. 461710.3116374.qx3zqy7 LAB ACTIVITY 1 word = input() 2 password = " 4 5.16.1: LAB: Password modifier 111 Type your code here. 111 main.py 0/10 Load default template...
Many user-created passwords are simple and easy to guess. Program that takes a simple password and makes it stronger by replacing characters using the key below, and by appending "q*s" to the end of the input string. i becomes ! a becomes @ m becomes M B becomes 8 o becomes . Ex: If the input is: mypassword the output is: Myp@ssw.rdq*s