In the history of cryptography, the Enigma was a portable ciphermachine used to encrypt and decrypt secret messages.
在密码学的历史上，谜是一轻便的密码机可将秘密通讯电文加密和解密。
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The quest for the true claimant drove people mad. Here are secrets and codes, an elaborate cipher-breaking machine, an obsession with graves and crazy adventures to find lost manuscripts.