A device or instrument designed to measure or detect hidden, secret, or encrypted information or communication.
From Greek 'kryptos' (hidden) + 'metron' (measure). This term is rare and technical, emerging in 20th-century espionage and security contexts to describe measuring devices for covert activity.
The cryptometer represents the eternal spy-versus-spy arms race—as soon as cryptologists hide secrets better, detection specialists invent devices to find those hidden secrets!
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