Write a program to perform encryption and decryption using wrapper class Encryption phase with shift n = En (x) = (x+n)mod 26Decryption phase with shift n = Dn (x) = (x-n)mod 26
Question
Write a program to perform encryption and decryption using wrapper class Encryption phase with shift n = En (x) = (x+n)mod 26Decryption phase with shift n = Dn (x) = (x-n)mod 26
Solution 1
Sure, here is a simple implementation of the Caesar Cipher in Python, which is what you're describing:
class CaesarCipher:
def __init__(self, shift):
self.shift = shift
def encrypt(self, message):
encrypted_message = ""
for char in message:
if char.isalpha():
ascii_offset = 65 if char.isupper() else 97
encrypted_message += chr((ord(char) - ascii_offset + self.shift) % 26 + ascii_offset)
else:
encrypted_message += char
return encrypted_message
def decrypt(self, message):
decrypted_message = ""
for char in message:
if char.isalpha():
ascii_offset = 65 if char.isupper() else 97
decrypted_message += chr((ord(char) - ascii_offset - self.shift) % 26 + ascii_offset)
else:
decrypted_message += char
return decrypted_message
# Usage
cipher = CaesarCipher(3)
encrypted = cipher.encrypt("HELLO")
print(encrypted) # KHOOR
decrypted = cipher.decrypt(encrypted)
print(decrypted) # HELLO
This program defines a class CaesarCipher that takes a shift value n as input. The encrypt method shifts each alphabetic character in the input string n positions to the right in the alphabet, wrapping around to the beginning of the alphabet if necessary. The decrypt method does the opposite, shifting n positions to the left. Non-alphabetic characters are left unchanged.
Solution 2
Sure, here is a simple implementation of the Caesar Cipher in Python, which is what you're describing:
class CaesarCipherSimilar Questions
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Problem StatementBetty is exploring character encryption using a program. She wants to encrypt a given character based on specific rules:Encrypt a given character by adding 2 to the ASCII value for uppercase Subtract 2 for lowercase letters. For non-alphabetic characters, add 5 to the ASCII value.Create a program that takes Betty's input character, converts it to a signed char, and prints the encrypted result.Input format :The input consists of a char value 'n', representing the character entered by Betty.Output format :The output displays the encrypted character after performing a conversion based on the given rules in the problem statement.
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