[Cryptography] What is the difference between a code and a cipher?

[John Wray (jwray)]

Similarly, Falcon codes were in use when I was in the Navy. We typically appended them to the last line of a RTTY message.

John AL4U

From: Tom Mitchell <mitch at niftyegg.com<mailto:mitch at niftyegg.com>>
Date: Thursday, September 4, 2014 at 7:22 PM
To: Peter Fairbrother <zenadsl6186 at zen.co.uk<mailto:zenadsl6186 at zen.co.uk>>
Cc: Cryptography Mailing List <cryptography at metzdowd.com<mailto:cryptography at metzdowd.com>>
Subject: Re: [Cryptography] What is the difference between a code and a cipher?

On Wed, Sep 3, 2014 at 8:16 PM, Peter Fairbrother <zenadsl6186 at zen.co.uk<mailto:zenadsl6186 at zen.co.uk>> wrote:
Old chestnut - is it being intended to be hard to decrypt? Having a variable key? Something else?

I don't know whether there is a definitive answer, but opinions are sought.


Cypher.... scrambled
Code   ....  words or phrases replace phrases or words.

A football team often uses code words to call a play.

A baseball coaching staff might use stenography  to call plays.

"Code talkers" used a different language to implement a code.

Morse code... replaces letters, words, phrases with dots and dashes.

http://en.wikipedia.org/wiki/Cipher


One size does not fit all.


--
  T o m    M i t c h e l l

F101
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