Documents
First-day survey
(postscript)
Modular arithmetic definitions and propositions (
ps
) (
pdf
) (
html
) (updated)
Chapter 1 glossary
Letter tally form
Digraph tally form
Trigraph tally form
David Kahn on the personalities of letters (
Word
) (
.htm
)
Vigenere cryptanalysis forms
Index of coincidence and polyalphabets (
ps
) (
pdf
) (
html
)