Definition from Wiktionary, the free dictionary
cryptophone (plural cryptophones)
- A telephone that provides security against eavesdropping and electronic surveillance.
2008 March 12, Peter Wayner, “Psst! Follow Me and I’ll Show You the Exhibition”, in New York Times:
- The bulky refrigerator-size boxes that scrambled the phone discussions of Roosevelt and Churchill are just steps from the hefty cryptophones of the 1970s and more modern versions.