Unclassified
BATCO
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Unclassified
BATCO
British paper cryptographic system
uncommon · Q4834680
Related cards · encryption
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Concepts
Cipher
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Works
Data Encryption Standard
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Unclassified
CRM 114 (fictional device)
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Concepts
Solitaire (cipher)
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Works
Seahorse (software)
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Unclassified
Mercury (cipher machine)
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