FilesExpand file tree

master

/

P40_CipherText.py

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

59 lines (50 loc) · 1.72 KB

master

/

P40_CipherText.py

Copy path

Top

File metadata and controls

• Code
• Blame

59 lines (50 loc) · 1.72 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

47

48

49

50

51

52

53

54

55

56

57

58

59

# Author: OMKAR PATHAK

# This program illustrates a simple example for encrypting/ decrypting your text

LETTERS = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'

LETTERS = LETTERS.lower()

def encrypt(message, key):

''' This function lets you to encrypt your message based on a key '''

encrypted = ''

for chars in message:

if chars in LETTERS:

num = LETTERS.find(chars)

num += key

if num>25:

num=num%25

num=num-1

encrypted =encrypted + LETTERS[num]

return encrypted

def decrypt(message, key):

''' This function lets you to decrypt your message based on a key '''

decrypted = ''

for chars in message:

if chars in LETTERS:

num = LETTERS.find(chars)

if num>25:

num=num%25

num=num-1

num = num -key

decrypted =decrypted+LETTERS[num]

return decrypted

def main():

message = str(input('Enter your message: '))

key = int(input('Enter you key [1 - 26]: '))

choice = input('Encrypt or Decrypt? [E/D]: ')

if choice.lower().startswith('e'):

print(encrypt(message, key))

else:

print(decrypt(message, key))

if __name__ == '__main__':

main()

# OUTPUT:

# omkarpathak@omkarpathak-Inspiron-3542:~/Documents/GITs/Python-Programs/Programs$ python P40_CipherText.py

# Enter your message: omkar

# Enter you key [1 - 26]: 2

# Encrypt or Decrypt? [E/D]: e

# qomct

#

# omkarpathak@omkarpathak-Inspiron-3542:~/Documents/GITs/Python-Programs/Programs$ python P40_CipherText.py

# Enter your message: qomct

# Enter you key [1 - 26]: 2

# Encrypt or Decrypt? [E/D]: d

# omkar