Historical US Military Doctrine: Why Telegrams Required Paraphrasing for Cryptographic Security
By
azeemba
Crisp on the outside, thoughtful on the inside. A keeper.
Summary
The article examines historical US military communications doctrine from WWII era that required telegrams to be 'closely paraphrased' before distribution. This practice was designed to prevent cryptographic attacks by ensuring the same message was never sent twice using identical encryption methods. The author cites a 1950 US Army Technical Manual (TM 32-220) on basic cryptography that superseded earlier 1944-1945 manuals, providing evidence of this security protocol.
Key quotes
· 4 pulledIt appears that it was US military communications doctrine to not send the exact same message twice using different encryption
the term of art for changing a message to avoid that was indeed 'paraphrase'
This telegram must be closely paraphrased before being communicated to anyone
Department of the Army Technical Manual TM 32-220 dated 1950, titled 'BASIC CRYPTOGRAPHY'
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