The Ultra Secret
Operation Ultra was designed to intercept and decode German signals sent using Enigma, the top-secret German cypher machine. F.W. Winterbotham, was the man responsible for the organization, distribution and security of Ultra. This is his personal account of the operation.
Specifications of The Ultra Secret
|Author||F. W. Winterbotham|
|Binding||Mass Market Paperback|
|Number Of Pages||286|
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