Splitting bit strings

From: Mok-Kong Shen (mok-kong.shen_at_t-online.de)
Date: 08/18/04 

Date: Wed, 18 Aug 2004 00:19:13 +0200

If I don't err, spread specturm techniques belong to the
realm of communication engineering and are as such not
something normally under the direct control of the common
users, though, as is well known, they may certainly
provide substantial security benefits.

It seems trivial but useful in my view to apply some gist
of the idea there also at the level of the user directly.
Are there existing applications of such in practice?
(Any references?) If not, why? I mean one could, for
example, split a bit string (this may be plaintext or
ciphertext) into eight bitstrings by employing a
pseudo-random sequence of 3-bit units to determine to
which of the eight streams any bit from the given bit
string goes. These resulting bit strings may of course
be subjected to arbitrary further encryption processing,
if desired. At the recipient side a corresponding merge
is done.

One could certainly also manage to have a number of
independent bit strings of the user be simultaneously
split and combined as is done in spread spectrum.

Thanks.

M. K. Shen