encdecpy

Python package to encode and decode strings using ciphers.

Installation

$ pip install encdecpy

Usage

The package provides the following ciphers to encode and decode strings -

1. Affine Cipher
2. Atbash Cipher
3. Autokey Cipher
4. Baconian Cipher
5. Base64 Cipher
6. Beaufort Cipher
7. Caesar Cipher
8. Columnar Transposition Cipher
9. Polybius Square Cipher
10. Rail Fence Cipher
11. ROT13 Cipher
12. Running Key Cipher
13. Simple Substitution Cipher
14. Vignere Cipher

Affine Cipher

from encdecpy import affine

• affine.encode(string, a, b) - Returns the encoded string.
• affine.decode(string, a, b) - Returns the decoded string.

a and b are integers between 0 and 25. a should be relatively prime to 26 and lie between 0 to 25 (both inclusive).

Atbash Cipher

from encdecpy import atbash

• atbash.encode(string) - Returns the encoded string.
• atbash.decode(string) - Returns the decoded string.

Autokey Cipher

from encdecpy import autokey

• autokey.encode(string, key) - Returns the encoded string.
• autokey.decode(string, key) - Returns the decoded string.

key is a string.

Baconian Cipher

from encdecpy import baconian

• baconian.encode(string) - Returns the encoded string.
• baconian.decode(string) - Returns the decoded string.

Base64 Cipher

from encdecpy import base64

• base64.encode(string) - Returns the encoded string.
• base64.decode(string) - Returns the decoded string.

Beaufort Cipher

from encdecpy import beaufort

• beaufort.encode(string, key) - Returns the encoded string.
• beaufort.decode(string, key) - Returns the decoded string.

key is a string.

Caesar Cipher

from encdecpy import caesar

• caesar.encode(string, key) - Returns the encoded string.
• caesar.decode(string, key) - Returns the decoded string.

key is a whole number.

Columnar Transposition Cipher

from encdecpy import columnartransposition

• columnartransposition.encode(string, key) - Returns the encoded string.
• columnartransposition.decode(string, key) - Returns the decoded string.

key is a string and should contain unique characters between A-Z.

Polybius Square Cipher

from encdecpy import polybiussquare

• polybiussquare.encode(string, key) - Returns the encoded string.
• polybiussquare.decode(string, key) - Returns the decoded string.

key is a string and should contain unique characters between a-z with one alphabet missing. Length of key should be 25. An example key - phqgiumeaylnofdxkrcvstzwb.

Rail Fence Cipher

from encdecpy import railfence

• railfence.encode(string, key) - Returns the encoded string.
• railfence.decode(string, key) - Returns the decoded string.

key is a positive number denoting the number of rails.

ROT13 Cipher

from encdecpy import rot13

• rot13.encode(string) - Returns the encoded string.
• rot13.decode(string) - Returns the decoded string.

Running Key Cipher

from encdecpy import runningkey

• runningkey.encode(string, key) - Returns the encoded string.
• runningkey.decode(string, key) - Returns the decoded string.

key is a large string, usually a paragraph taken from a book.

Simple Substitution Cipher

from encdecpy import simplesubstitution

• simplesubstitution.encode(string, key) - Returns the encoded string.
• simplesubstitution.decode(string, key) - Returns the decoded string.
• simplesubstitution.generate_random_key() - Returns a randomly generated key.

key is a string containing a permutation of the alphabets (a-z), with no other characters. String should contain only unique characters.

Vignere Cipher

from encdecpy import vignere

• vignere.encode(string, key) - Returns the encoded string.
• vignere.decode(string, key) - Returns the decoded string.

key is a string, usually a single word.