I am very concerned about the insecurity of the Republican
communications. The Dutch continually make statements showing that
they have broken the Republican code [1] and although the
Republicans are aware of this, they seem unable to devise a more
secure version. If this lack of security continues it will put the
Republic (and us) in a farcical position during the talks on board
ship when their messages between Jogjakarta and the ship will be
passed by wireless telegraphy.

2. I am sure that you will agree from all view points that it [is]
absolutely essential that during the talks, the Republic's
exchange of messages should be 100% secure. I would be pleased
therefore if you would give very urgent and immediate
consideration to obtaining from departmental or service sources a
code which we can make available to the Republic. The code could
be explained to them secretly by us and they could make any
changes to suit themselves (I hope it will be possible for the
code to be forwarded on plane which brings a new engine for our
R.A.A.F. plane here).

3. If this suggestion is unacceptable the only other alternatives
appear to be-
(A) Moore suggests to them employ code based on Playfair [2];

(B) For us to try to find ways and means of improving the security
of their present code and have Moore and Turner advise them
(secretly, of course).

4. Your urgent comments would be appreciated, as I appreciate on
this important matter that I should not take any steps without
your knowledge and approval, even making Moore and Turner
available to advise the Republic. [3]