This catalog contains a picture and short description of all the machines displayed online in the Cipher History Museum. Each chapter highlights a different technology used for that category of cipher machine. The first part of the chapter provides an overview of the type of cipher technology on display and the individual machines are then listed chronologically, just as they appear in the museum. Additional information about the history and technology of these machines, along with more pictures, is available at CipherMachines.com.
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