JN25: Uncovering JN25: Japan's Secret WWII Naval Cipher 🔍
Join Professor Chris Christensen for a virtual talk on JN25, the Imperial Japanese Navy's advanced WWII naval code that succeeded earlier ciphers. Discover its secrets and impact during the war.
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7.2K views • Apr 8, 2022
About this video
A Virtual Talk by Professor Chris Christensen
A successor to the Red Book and Blue Book codes, JN-25 was introduced by the Imperial Japanese Navy on 1 June 1939.
JN-25 was a 5-digit code that was enciphered by additives. The cipher was first broken by British codebreaker John Tiltman, but after the Japanese attacks that led to war in the Far East, the primary responsibility for breaking JN-25 messages was assigned to the US Navy’s codebreaking section OP-20-G.
This presentation will explore the structure and evolution of the cipher and describe the basic ideas of the codebreaking attacks on JN-25.
29 30
A successor to the Red Book and Blue Book codes, JN-25 was introduced by the Imperial Japanese Navy on 1 June 1939.
JN-25 was a 5-digit code that was enciphered by additives. The cipher was first broken by British codebreaker John Tiltman, but after the Japanese attacks that led to war in the Far East, the primary responsibility for breaking JN-25 messages was assigned to the US Navy’s codebreaking section OP-20-G.
This presentation will explore the structure and evolution of the cipher and describe the basic ideas of the codebreaking attacks on JN-25.
29 30
Video Information
Views
7.2K
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164
Duration
01:09:43
Published
Apr 8, 2022
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4.6
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