160756Sbostic.\" Copyright (c) 1989, 1991, 1993 260756Sbostic.\" The Regents of the University of California. All rights reserved. 343541Strent.\" 443542Strent.\" %sccs.include.redist.man% 543541Strent.\" 6*64887Sbostic.\" @(#)caesar.6 8.2 (Berkeley) 11/16/93 743541Strent.\" 850842Scael.Dd 950842Scael.Dt CAESAR 6 1050842Scael.Os 1150842Scael.Sh NAME 1250842Scael.Nm caesar 1350842Scael.Nd decrypt caesar cyphers 1450842Scael.Sh SYNOPSIS 1550842Scael.Nm caesar 1650842Scael.Op Ar rotation 1750842Scael.Sh DESCRIPTION 1843541StrentThe 19*64887Sbostic.Nm caesar 2045566Sbosticutility attempts to decrypt caesar cyphers using English letter frequency 2143541Strentstatistics. 22*64887Sbostic.Nm Caesar 2343541Strentreads from the standard input and writes to the standard output. 2450842Scael.Pp 2543541StrentThe optional numerical argument 2650842ScaelAr rotation 2743541Strentmay be used to specify a specific rotation value. 2850842Scael.Pp 2945566SbosticThe frequency (from most common to least) of English letters is as follows: 3050842Scael.Pp 3150842Scael.Bd -filled -offset indent 3245566SbosticETAONRISHDLFCMUGPYWBVKXJQZ 3350842Scael.Ed 3450842Scael.Pp 3545566SbosticTheir frequencies as a percentage are as follows: 3650842Scael.Pp 3750842Scael.Bd -filled -offset indent 3845566SbosticE(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), 3950842ScaelD(3.8), L(3.4), F(2.9), C(2.7), M(2.5), U(2.4), G(2), 4050842ScaelP(1.9), Y(1.9), 4145566SbosticW(1.5), B(1.4), V(.9), K(.4), X(.15), J(.13), Q(.11), Z(.07). 4250842Scael.Ed 4350842Scael.Pp 4450842ScaelRotated postings to 4550842Scael.Tn USENET 4650842Scaeland some of the databases used by the 4750842Scael.Xr fortune 6 4845566Sbosticprogram are rotated by 13 characters. 49