Programa de cifrado y descifrado de cifrado caesar en ejemplo de código Python

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Ejemplo 1: descifrado automático de cifrado césar de Python

x =input()
NUM_LETTERS =26defSpyCoder(S, N):
   y =""for i in S:if(i.isupper()):
         x =ord(i)
         x += N
         if x >ord('Z'):
            x -= NUM_LETTERS
         elif x <ord('A'):
            x += NUM_LETTERS
         y +=chr(x)else:
         y +=" "return y

defGoodnessFinder(S):
   y =0for i in S:if i.isupper():
         x =ord(i)
         x -=ord('A')
         y += letterGoodness[x]else:
         y +=1return y

defGoodnessComparer(S):
   goodnesstocompare = GoodnessFinder(S)
   goodness =0
   v =''
   best_v = S
   for i inrange(0,26):
     v = SpyCoder(S, i)
     goodness = GoodnessFinder(v)if goodness > goodnesstocompare:
         best_v = v
         goodnesstocompare = goodness
   return best_v


print(GoodnessComparer(x))

Ejemplo 2: cifrado césar de python

defcaesar_encrypt():
    word =input('Enter the plain text: ')
    c =''for i in word:if(i ==' '):
            c +=' 'else:
            c +=(chr(ord(i)+3))return c

defcaesar_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)

Ejemplo 3: cifrado césar de python

plaintext =input("Please enter your plaintext: ")
shift =input("Please enter your key: ")
alphabet ="abcdefghijklmnopqrstuvwxyz"
ciphertext =""# shift value can only be an integerwhileisinstance(int(shift),int)==False:# asking the user to reenter the shift value
  shift =input("Please enter your key (integers only!): ")

shift =int(shift)
  
new_ind =0# this value will be changed laterfor i in plaintext:if i.lower()in alphabet:
    new_ind = alphabet.index(i)+ shift
    ciphertext += alphabet[new_ind %26]else:
    ciphertext += i    
print("The ciphertext is: "+ ciphertext)

Ejemplo 4: pitón cifrado césar

defcc_encrypt(msg:str,key:int)->str:
    encrypted_msg =''try:for char in msg:
            encrypted_msg +=str(chr(ord(char)+int(key)))except:print(Exception)passreturn encrypted_msg

defcc_decrypt(msg:str,key:int)->str:
    decrypted_msg =''try:for char in msg:
            decrypted_msg +=chr(ord(char)-int(key))except:print(Exception)passreturn decrypted_msg

  
message ='Hello World!'
key =9print(f'Caesar Cipher:nEncrypted: cc_encrypt(message,key)nDecrypted: cc_decrypt(cc_encrypt(message,key),key)')

Ejemplo 5: cifrado césar en python

defencrypt(text,s):
result =""# transverse the plain textfor i inrange(len(text)):
      char = text[i]# Encrypt uppercase characters in plain textif(char.isupper()):
         result +=chr((ord(char)+ s-65)%26+65)# Encrypt lowercase characters in plain textelse:
         result +=chr((ord(char)+ s -97)%26+97)return result
#check the above function
text ="CEASER CIPHER DEMO"
s =4print"Plain Text : "+ text
print"Shift pattern : "+str(s)print"Cipher: "+ encrypt(text,s)

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