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метод "запрос-ответ" stresses
data.prot.	question-answer method; question-answer technique
метод аутентификации запрос-ответ
data.prot.	challenge/response method; challenge/response technique
метод "запрос – ответ"
sec.sys.	question-answer method; challenge/response method

метод "запрос-ответ: 14 phrases in 6 subjects

Banking	1
Electronics	1
Information security and data protection	4
Information technology	1
Programming	4
Security systems	3