CAESAR(6) BSD Reference Manual CAESAR(6) NNAAMMEE ccaaeessaarr - decrypt caesar cyphers SSYYNNOOPPSSIISS ccaaeessaarr [_r_o_t_a_t_i_o_n] DDEESSCCRRIIPPTTIIOONN The Nm caesar utility attempts to decrypt caesar cyphers using English letter frequency statistics. Nm Caesar reads from the standard input and writes to the standard output. The optional numerical argument Ar rotation may be used to specify a spe- cific rotation value. The frequency (from most common to least) of English letters is as fol- lows: 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 for- tune(6) program are rotated by 13 characters. 4.4BSD May 31, 1993 1