ROT13

Mahendra Kumar

intermediatecryptographyencoding

Python Programming implementing ROT13 encoding

ROT13 ("rotate by 13 places", sometimes hyphenated ROT-13) is a simple letter substitution cypher that replaces a letter with the 13th letter after it in the alphabet. ROT13 is a special case of the Caesar cypher which was developed in ancient Rome.

from string import maketrans
rot13trans = maketrans('ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz', 
   'NOPQRSTUVWXYZABCDEFGHIJKLMnopqrstuvwxyzabcdefghijklm')
# Function to translate plain text
def rot13(text):
   return text.translate(rot13trans)
def main():
   txt = "ROT13 Algorithm"
   print rot13(txt)
	
if __name__ == "__main__":
   main()