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Diffstat (limited to 'doc/context')
| -rw-r--r-- | doc/context/third/enigma/enigma_manual.tex | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/doc/context/third/enigma/enigma_manual.tex b/doc/context/third/enigma/enigma_manual.tex index efb4fe2..d136dc1 100644 --- a/doc/context/third/enigma/enigma_manual.tex +++ b/doc/context/third/enigma/enigma_manual.tex @@ -81,6 +81,50 @@ Encryption equals decryption. \stoptext \endinput \stopcontexttyping +\useURL[kgbuch] [http://de.wikipedia.org/wiki/Kenngruppenbuch] + [] [code book] +Now it’s certainly not wise to carry around the key to encrypted +documents as plain text within those documents. The keys will have to be +distributed via an independent channel, e.\,g. a \from[kgbuch]. +Keys in general don’t have to be supplied inside the document. If there +is none specified, the module will interrupt the \TEX\ run and +\emph{ask} for user input. Suppose Alice wanted to send an encrypted +file to Bob and already generated the cipher text as follows: + +\starttyping +mtxrun --script mtx-t-enigma \ + --setup="day_key =B I IV V 22 07 10 AZ DG IE YJ QM CW, \ + rotor_setting = bar, \ + verbose=0" \ + --text="I have nothing to hide. From the NSA, that is." +\stoptyping + +Alice would then include the result of this line in her \LATEX\ document +as follows: + +\startlatextyping +\documentclass{scrartcl} +\usepackage{enigma} +\defineenigma{decryption} +%% Encryption key not given in the setup. +\setupenigma{decryption}{ + rotor_setting = bar, + verbose = 3, +} +\begin{document} + +\startdecryption +usbatbwcaajhzgeyzkqskupzbmdhbdepccgeh +\stopdecryption + +\end{document} +\stoplatextyping + +She subsequently mails this file to Bob and conveys the key through a +secure channel. They only thing that will be left for Bob to do now, is +to enter the key at the prompt when compiling the document with +\LUALATEX. + \stopdocsection \stopdocchapter |