[Cryptography] Practicality of codebook in current-day secret communications

[mok-kong shen]

Am 24.02.2016 um 20:58 schrieb mok-kong shen:
[snip]
> ........ Note
> that the codebook need not be static but can preferrably be dynamic,
> i.e. dependent on a session key.
[snip]

Edited:

It may be remarked that the codebook need not be static but can
preferrably be dynamic, i.e. the mapping between the codewords and
their meanings is dependent on a session key, being a random
permutation (Fisher and Yates algorithm or alternatives) determined by
it. The codewords are preferrably to be chosen to be certain commonly
employed words, e.g. surnames etc. in order to ease the composition of
a fairly natural covertext. In case it is desired to have integrity
check, one could employ two disjoint sets of codewords that are
independently permuted w.r.p.t. the set of meanings so that each
meaning (or only those meanings that are classified as important) will
be trasmitted via the coexistence of at least one keyword from each set.

M. K. Shen