Foreign Office
Commander Mansfield Cumming “C”
Agadir Crisis
British Expeditionary Force
GHQ I(b)
Admiral William Reginald “Blinker” Hall
NATURE OF THE GREAT WAR
symmetric war
timetable war
consumer’s expectation
cavalry as battlefield intelligence
trench warfare
static intelligence structures
industrialized war of attrition (totalwar)
war of ideologies
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Margaret Zelle -- Mata Hari
Room 40
CRYPTOGRAPHY 101
plaintext
steganography
transmission security
cryptography
cipher
transposition
substitution
cipher alphabets
homophones
nulls
monoalphabetic cipher
polyalphabetic cipher
code
code words
monophone code
polyphone code
digraph or bigram
polygram
encicode
placode
key
keyword, keyphrase, or key number
decipher or decode
decrypt (verb) -- cryptoanalysis
decryption -- decrypt (noun)
cleartext or "in clear" or "in plain language"
paradox of cryptanalysis
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Arthur Zimmerman
Zimmerman Telegraph (Zimmerman Note)
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