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Find the primitive roots of G=?.(a) {2, 6, 8}(b) {2, 5, 8}(c) {3, 4, 7, 8}(d) {2, 6, 7, 8}I have been asked this question in quiz.The origin of the question is Number Theory in chapter More Number Theory of Cryptograph & Network Security

Answer»

The correct CHOICE is (d) {2, 6, 7, 8}

For explanation I would say: Number of primitive roots = F(f(11))=f((111-110)) = f(10)= f(2). f(5)

= (21-20)(51-50) = 1 X 4 = 4

The primitive roots of this set {2, 6, 7, and 8}.



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