Chronology Current Month Current Thread Current Date
[Year List] [Month List (current year)] [Date Index] [Thread Index] [Thread Prev] [Thread Next] [Date Prev] [Date Next]

Re: [Phys-L] rot13 cipher

Thanks to John Denker for providing this explanation and websites. Somehow
I missed any earlier messages about rot13.

Dr. Donald Polvani
Retired Engineer and Community College Physics Instructor

-----Original Message-----
From: Phys-l [] On Behalf Of John Denker
Sent: Monday, June 30, 2014 4:20 PM
Subject: [Phys-L] rot13 cipher

I quote from

The algorithm provides virtually no cryptographic security, and is
often cited as a canonical example of weak encryption.

ROT13 is used in online forums as a means of hiding spoilers,
punchlines, puzzle solutions, and offensive materials from the casual
glance. ROT13 has been described as the "Usenet equivalent of a
magazine printing the answer to a quiz upside down".

Some people found this obvious ... but others complained off-list that it
wasn't obvious.

As previously discussed in this forum, decoders are readily available, e.g.


In analogy to triple-DES, which is widely used because it is more secure
than the basic DES (digital encryption standard), some people use

Forum for Physics Educators