NAME

       caesar, rot13 — decrypt caesar ciphers

SYNOPSIS

       caesar [rotation]

DESCRIPTION

       The  caesar utility attempts to decrypt caesar ciphers using English letter frequency statistics.  caesar
       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.

Debian                                          November 16, 1993                                      CAESAR(6)