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The Path of a Message

How did an enemy message get to Bletchley Park and what happened once it was here?

Intercept - Y Stations

Enemy messages were obtained by the ‘Y’ Service, a chain of wireless intercept stations across Britain and in a number of countries overseas.

Decryption

After interception, the encrypted messages were taken down on paper and sent to Bletchley Park by motorcycle or teleprinter

Analysis

Bletchley Park did not just decrypt messages, the contents had to be analysed

Dissemination

The final step in the codebreaking process was to send the resulting top secret intelligence to the relevant people

Intercept - Y Stations

Enemy messages were obtained by the ‘Y’ Service, a chain of wireless intercept stations across Britain and in a number of countries overseas.

Analysis

Bletchley Park did not just decrypt messages, the contents had to be analysed

Decryption

After interception, the encrypted messages were taken down on paper and sent to Bletchley Park by motorcycle or teleprinter

Dissemination

The final step in the codebreaking process was to send the resulting top secret intelligence to the relevant people