caesar(6) - NetBSD Manual Pages

Command: Section: Arch: Collection:  
CAESAR(6)                     NetBSD Games Manual                    CAESAR(6)


NAME
caesar, rot13 -- decrypt caesar ciphers
SYNOPSIS
caesar [rotation]
DESCRIPTION
The caesar utility attempts to decrypt caesar ciphers using English let- ter 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 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 fortune(6) program are rotated by 13 characters. NetBSD 9.2_STABLE November 16, 1993 NetBSD 9.2_STABLE
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