def decrypt(self, ciphertext, key):
plaintext = []
ciphertext = ciphertext.lower()
ciphertext = cv.textToNum(ciphertext)
for letter in ciphertext:
plaintext.append((letter - key) % 26)
return cv.numToText(plaintext)
def encrypt(self, plaintext, key):
ciphertext = []
plaintext = plaintext.lower()
plaintext = cv.textToNum(plaintext)
for letter in plaintext:
ciphertext.append((letter + key) % 26)
return cv.numToText(ciphertext)
def encrypt(self, plaintext):
ciphertext = []
result = []
key = []
#pretvori tekst u polje brojeva u rasponu 0-25
plaintext = cv.textToNum(plaintext)
#za svaku vrijednost otvorenog teksta dodaj pseudonasumican broj u rasponu 0-25
for value in range(len(plaintext)):
key.append(rand.randrange(0, 26))
#modularno zborji otvoreni tekst i kljuc
ciphertext = self.modularAddition(plaintext, key)
ciphertext = cv.numToText(ciphertext)
result.append(ciphertext)
result.append(cv.numToText(key))
return result
def calculateCipher(self, letter_vector, m):
ciphertext = ''
vector = []
buffer = 0
for value in range(len(letter_vector)):
for col in range(m):
for row in range(m):
#pomnoži blok od m slova s matricom ključa
buffer += int(
(letter_vector[value][row] * self.key[col][row]))
buffer %= 26
vector.append(buffer)
buffer = 0
#pretvori izračunate vrijednosti bloka u tekst
print(vector)
ciphertext += cv.numToText(vector)
print(ciphertext)
vector = []
return ciphertext