noun
Usage: usually capitalized B&C
Etymology: translation of French chambre noire
: a government office or department engaged in cryptographic work, especially cryptanalysis
noun
Usage: usually capitalized B&C
Etymology: translation of French chambre noire
: a government office or department engaged in cryptographic work, especially cryptanalysis
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012