NAME

       tcl::transform::otp - Encryption via one-time pad

SYNOPSIS

       package require Tcl  8.6

       package require tcl::transform::core  ?1?

       package require tcl::transform::otp  ?1?

       ::tcl::transform::otp chan keychanw keychanr

________________________________________________________________________________________________________________

DESCRIPTION

       The  tcl::transform::otp  package  provides  a  command  creating  a  channel  transformation  which uses
       externally provided one-time pads to perform encryption (on writing) and decryption (on reading).

       A related transformations in this module is tcl::transform::rot.

       The internal TclOO class implementing the transform handler is a sub-class  of  the  tcl::transform::core
       framework.

API

       ::tcl::transform::otp chan keychanw keychanr
              This command creates a one-time pad based encryption transformation on top of the channel chan and
              returns its handle.

              The two channels keychanw  and  keychanr  contain  the  one-time  pads  for  the  write  and  read
              directions,  respectively.  Their  contents are reads and xored with the bytes written to and read
              from the channel.

BUGS, IDEAS, FEEDBACK

       This document, and the package it describes, will undoubtedly contain bugs and  other  problems.   Please
       report  such  in  the category virtchannel of the Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist].
       Please also report any ideas for enhancements you may have for either package and/or documentation.

       When proposing code changes, please provide unified diffs, i.e the output of diff -u.

       Note further that attachments are strongly preferred over inlined patches. Attachments  can  be  made  by
       going  to the Edit form of the ticket immediately after its creation, and then using the left-most button
       in the secondary navigation bar.

KEYWORDS

       channel transformation, cipher, decryption, encryption, one time pad, otp, reflected  channel,  tip  230,
       transformation, virtual channel, xor

CATEGORY

       Channels

COPYRIGHT

       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>