rot26

ROT13 ("rotate by 13 places", sometimes hyphenated ROT-13) is a letter substitution cipher that replaces a letter with the letter 13 letters after it in the alphabet. Instead of only rotating 13 places, ROT26 rotates twice as many characters in the alphabet and is therefore twice as secure.

• jD91mZM2

Since Carp needs to be on the forefront in technical breakthroughs, this package needs to be implemented. It is a general rotation cypher suite, with convenience functions for rot13 and rot26.

Install

Don’t.

Usage

The ROT module within rot26.carp implements six functions, three for encryption:

(use ROT)

; rot26 should always be used for maximum security
(ROT.rot26 "secure me!") ; => "secure me!"

; rot13 is provided for compatibility reasons
(ROT.rot13 "secure me!") ; => "frpher zr!"

; because no cryptography library is complete without
; gratuituous API complexity, we provide arbitrary
; rotation as well
(ROT.rot "secure me!" 1) ; => "tfdvsf nf!"

And three for decryption:

(use ROT)

(ROT.unrot26 "secure me!") ; => "secure me!"

(ROT.unrot13 "frpher zr!") ; => "secure me!"

(ROT.unrot "tfdvsf nf!" 1) ; => "secure me!"

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Have fun!