English ⇄ Russian +

challenge-response string stresses
data.prot.	последовательность запросов и ответов

challenge-response : 37 phrases in 12 subjects

Biology	1
Computer networks	2
Ecology	1
Electronics	1
Immunology	1
Information security and data protection	9
Information technology	1
Mass media	2
Microsoft	1
Programming	7
Security systems	10
Telecommunications	1