basic linguistics data and methods

[rwst]

For cryptanalysis of classical ciphers, natural language-specific data like digram, trigram frequencies, indices of coincidence, and specific alphabets are needed. This ticket is collective for

• implementation of data structure holding the data
• inclusion of same static data for at least one natural language

Suggest to use NaturalLanguage.

Some code to use could be Jon Hanke's http://www.wordpress.jonhanke.com/wp-content/uploads/2012/02/crypto_routines.txt

CC: @rwst

Component: cryptography

Keywords: natural language, linguistics, ngram, friedman, alphabet

Issue created by migration from https://trac.sagemath.org/ticket/15772

[rwst]

Description changed:

--- 
+++ 
@@ -4,3 +4,5 @@
 * inclusion of same static data for at least one natural language

 Suggest to use `NaturalLanguage`.
+
+Some code to use could be Jon Hanke's http://www.wordpress.jonhanke.com/wp-content/uploads/2012/02/crypto_routines.txt