caesar cipher encryption and decryption in python

def caesar_encrypt(): word = input('Enter the plain text: ') c = '' for i in word: if (i == ' '): c += ' ' else: c += (chr(ord(i) + 3)) return c def caesar_decrypt(): word = input('Enter the cipher text: ') c = '' for i in word: if (i == ' '): c += ' ' else: c += (chr(ord(i) - 3)) return c plain = 'hello' cipher = caesar_encrypt(plain) decipher = caesar_decrypt(cipher)

caesar's encrption python'

def encrypt(text,s):
result = ""
   # transverse the plain text
   for i in range(len(text)):
      char = text[i]
      # Encrypt uppercase characters in plain text
      
      if (char.isupper()):
         result += chr((ord(char) + s-65) % 26 + 65)
      # Encrypt lowercase characters in plain text
      else:
         result += chr((ord(char) + s - 97) % 26 + 97)
      return result
#check the above function
text = "CEASER CIPHER DEMO"
s = 4

print "Plain Text : " + text
print "Shift pattern : " + str(s)
print "Cipher: " + encrypt(text,s)

Posted by: Guest on December-23-2020

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