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REPAGINATION :
Renumbering of the pages of a code book, normally affecting all except
two of the figures of each code-group.
REPEAT :
1. (especially) A second or subsequent occurrence of a code or cipher
passage or set of characteristics either in the same or in other
messages.
2. A cipher passage or series of characteristics that occurs elsewhere,
either in the same or in other messages.
3. A second or subsequent transmission of a message or any part thereof.
4. Re-use of subtractor tables or keys; a subtractor table or other key
thus re-used.
REPEATER :
1. One that repeats or recurs.
2. A re-encipherment.
REQUEST :
(in German Y service Traffic) A short message from an aircraft giving
the frequency and call sign of an enemy station which it has picked up,
and asking for an immediate bearing to be taken on that station.
RE-RECIPHER :
A second reciphering key or process applied to an already reciphered
code message.
RE-REGISTER :
A register of decoded messages designed to assist book-breaking
especially on the introduction of a new code-book for the same traffic.
See next.
RE-REGISTRATION :
A second registration of cipher or code messages; especially a registration
of decoded messages, made on the basis of originating unit or station, and
including such particulars as date and time of origin, call-sign, address,
signature, originator's serial number, transmitting station's serial
number, nature of subject matter, and index number of decode, designed to
facilitate book-breaking especially when a new book is introduced.
RESEARCH :
Systematic study or investigation of any (esp. of a new) type of cipher
traffic aimed at (a) establishing its essential character, e.g. whether
transposition or substitution and, if the latter, whether machine or hand
cipher or code (b) determining the essential character of the processes
and appliances or mechanisms, if any, involved in its production; and
(c) devising methods of attack, and esp. methods of solution, appropriate
to the ascertained nature of the problem; (cf. Development). Also, the
production of general treatises on cryptography, e.g. this dictionary.
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