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

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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  SF  Trackers
       [http://sourceforge.net/tracker/?group_id=12883].    Please  also  report  any  ideas  for
       enhancements you may have for either package and/or documentation.

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>