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CAESAR

Section: Games and Demos (6)
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BSD mandoc
 

NAME

caesar rot13 - decrypt caesar cyphers  

SYNOPSIS

[rotation ]  

DESCRIPTION

The utility attempts to decrypt caesar cyphers using English letter frequency statistics. reads from the standard input and writes to the standard output.

The optional numerical argument rotation may be used to specify a specific rotation value.

The frequency (from most common to least) of English letters is as follows:

ETAONRISHDLFCMUGPYWBVKXJQZ

Their frequencies as a percentage are as follows:

E(13), T(10.5), A(8.1), O(7.9), N(7.1), R(6.8), I(6.3), S(6.1), H(5.2), D(3.8), L(3.4), F(2.9), C(2.7), M(2.5), U(2.4), G(2), P(1.9), Y(1.9), W(1.5), B(1.4), V(.9), K(.4), X(.15), J(.13), Q(.11), Z(.07).

Rotated postings to USENET and some of the databases used by the fortune(6) program are rotated by 13 characters.


 

Index

NAME
SYNOPSIS
DESCRIPTION




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